#  @crashcourse CrashCourse CrashCourse posts on YouTube about education, green, history, hank the most. They currently have [----------] followers and [---] posts still getting attention that total [-------] engagements in the last [--] hours. ### Engagements: [-------] [#](/creator/youtube::UCX6b17PVsYBQ0ip5gyeme-Q/interactions)  - [--] Week [---------] -0.51% - [--] Month [----------] +61% - [--] Months [----------] +34% - [--] Year [-----------] +35% ### Mentions: [---] [#](/creator/youtube::UCX6b17PVsYBQ0ip5gyeme-Q/posts_active)  - [--] Week [---] +7.50% - [--] Month [-----] +4.80% - [--] Months [-----] +6.40% - [--] Year [-----] +8.30% ### Followers: [----------] [#](/creator/youtube::UCX6b17PVsYBQ0ip5gyeme-Q/followers)  - [--] Week [----------] no change - [--] Month [----------] +0.60% - [--] Months [----------] +2.40% - [--] Year [----------] +4.30% ### CreatorRank: [-------] [#](/creator/youtube::UCX6b17PVsYBQ0ip5gyeme-Q/influencer_rank)  ### Social Influence **Social category influence** [countries](/list/countries) 21.96% [finance](/list/finance) 5.44% [travel destinations](/list/travel-destinations) 4.8% [technology brands](/list/technology-brands) 2.99% [currencies](/list/currencies) #4141 [celebrities](/list/celebrities) 2.56% [stocks](/list/stocks) 2.03% [social networks](/list/social-networks) 1.39% [automotive brands](/list/automotive-brands) 0.85% [gaming](/list/gaming) 0.43% **Social topic influence** [education](/topic/education) #931, [green](/topic/green) #1613, [history](/topic/history) #1918, [hank](/topic/hank) #88, [john](/topic/john) 20.47%, [science](/topic/science) #1693, [united states](/topic/united-states) #6466, [what is](/topic/what-is) #1342, [in the](/topic/in-the) 6.29%, [the world](/topic/the-world) #4595 **Top accounts mentioned or mentioned by** [@the](/creator/undefined) [@curein60_nt](/creator/undefined) [@bdbiam](/creator/undefined) [@joshlama](/creator/undefined) [@wordlessrage](/creator/undefined) [@n05albums](/creator/undefined) [@n008817671329](/creator/undefined) [@gmailcom](/creator/undefined) [@n072819311727](/creator/undefined) [@edtechari](/creator/undefined) [@simplscientist](/creator/undefined) [@n0213764313763](/creator/undefined) [@gopage216695](/creator/undefined) [@thethoughtemporium](/creator/undefined) [@cosmicskeptic](/creator/undefined) [@tommocarroll](/creator/undefined) [@besmart](/creator/undefined) [@veritastruthyt](/creator/undefined) [@zenatisyo7182](/creator/undefined) [@falemetv](/creator/undefined) **Top assets mentioned** [Alphabet Inc Class A (GOOGL)](/topic/$googl) ### Top Social Posts Top posts by engagements in the last [--] hours "Nonexistent Objects & Imaginary Worlds: Crash Course Philosophy #29 Today we transition between units on language and aesthetics with a discussion of nonexistent and imaginary objects. Is it possible to make true assertions about things that arent real Well explore Meinongs Jungle and the concept of a universe of discourse. -- House of Cards Copyright [----] Netflix Harry Potter Copyright Warner Brothers Hogwarts photo by Rob Young via WikiMedia Commons CC BY [---] https://commons.wikimedia.org/wiki/File:Hogwarts_Castle_(7119191451).jpg -- Produced in collaboration with PBS Digital Studios:" [YouTube Link](https://youtube.com/watch?v=Y7v2kESrqDQ) 2016-09-27T16:45Z 16.9M followers, 895.3K engagements "Slavery - Crash Course US History #13 In which John Green teaches you about America's "peculiar institution" slavery. I wouldn't really call it peculiar. I'd lean more toward a horrifying and depressing institution but nobody asked me. John will talk about what life was like for an enslaved person in the 19th century United States and how enslaved people resisted oppression to the degree that was possible. We'll hear about cotton plantations the violent punishment of enslaved people the day-to-day lives of enslaved people and slave rebellions. Nat Turner Harriet Tubman and Whipped Peter all" [YouTube Link](https://youtube.com/watch?v=Ajn9g5Gsv98) 2013-05-02T23:34Z 16.9M followers, 5.5M engagements "Bureaucracy Basics: Crash Course Government and Politics #15 This week Craig Benzine discusses bureaucracies. Bureaucracies tend to be associated with unintelligible rules and time-wasting procedures but they play an important though controversial role in governing. From the FDA to the EPA these agencies were established to help the government manage and carry out laws much more efficiently - to bring rule-making and enforcement closer to the experts. But the federal bureaucracy (which is part of the executive branch) has a lot of power and sometimes acts like Congress in creating regulations" [YouTube Link](https://youtube.com/watch?v=I8EQAnKntLs) 2015-05-09T15:41Z 16.9M followers, 1.7M engagements "American Imperialism: Crash Course US History #28 In which John Green teaches you about Imperialism. In the late 19th century the great powers of Europe were running around the world obtaining colonial possessions especially in Africa and Asia. The United States which as a young country was especially susceptible to peer pressure followed along and snapped up some colonies of its own. The US saw that Spain's hold on its empire was weak and like some kind of expansionist predator it jumped into the Cuban War for Independence and turned it into the Spanish-Cuban-Phillipino-American War which" [YouTube Link](https://youtube.com/watch?v=QfsfoFqsFk4) 2013-09-05T23:26Z 16.9M followers, 4.8M engagements "19th Century Reforms: Crash Course US History #15 In which John Green teaches you about various reform movements in the 19th century United States. From Utopian societies to the Second Great Awakening to the Abolition movement American society was undergoing great changes in the first half of the 19th century. Attempts at idealized societies popped up (and universally failed) at Utopia OH New Harmony IN Modern Times NY and many other places around the country. These utopians had a problem with mainstream society and their answer was to withdraw into their own little worlds. Others didn't like" [YouTube Link](https://youtube.com/watch?v=t62fUZJvjOs) 2013-05-15T00:46Z 16.9M followers, 3.2M engagements "Natural Hazards: Crash Course Geography #27 Today we wrap up the first half of our series on physical geography by taking a closer look at natural hazards - which are physical processes like heat waves and cyclones earthquakes and volcanic eruptions and floods and droughts. And when these natural events cause significant harm to humans we call them natural disasters. So today we'll explore the ways geographers analyze and track these events and take a closer look at the human impact of Hurricane Katrina in New Orleans and The Boxing Day Tsunami on the Andaman and Nicobar islands. Watch our" [YouTube Link](https://youtube.com/watch?v=-FBq5lE1Kz0) 2021-09-20T20:46Z 16.9M followers, 391.4K engagements "How to Transfer Colleges Crash Course How to College You're already learning on YouTube why not get college credit for it https://link.gostudyhall.com/my1 Sometimes you realize the school you're attending just isn't right for you. Or you discover you want to change majors and a different school has a better program. Or you've completed your gen ed classes at a community college and are ready to transfer to a [--] year institution. For whatever reason transferring is something we may have to deal with to complete our college journeys. And yes it can be a pain. But in this episode of Crash Course:" [YouTube Link](https://youtube.com/watch?v=-RQdkW-em-g) 2022-05-26T22:00Z 16.9M followers, 126.5K engagements "Animals & Shapeshifters: Crash Course Latin American Literature #10 Fish and insects and dogsoh my In this episode of Crash Course Latin American Literature well explore how all things fuzzy buzzy and ferocious can help us understand our own human nature. Introduction: Latin American Animals 00:00 Antnio Vieira 0:46 Alejo Carpentier 3:34 Pilar Quintana 6:27 Review & Credits 8:54 Sources: https://docs.google.com/document/d/1eE7g4-k6PD7C6wNBzeJIO8GCDHpoJl8ldDjKyq_2yYg/edittab=t.0 To learn more check out these videos: https://www.youtube.com/watchv=oyv-eJRRozs" [YouTube Link](https://youtube.com/watch?v=0ZpphjzNaGI) 2026-01-29T17:00Z 16.9M followers, 20.1K engagements "Disease Crash Course World History [---] In which John Green teaches you about disease and the effects that disease has had in human history. Disease has been with man since the beginning and it has shaped the way humans operate in a lot of ways. John will teach you about the Black Death the Great Dying and the modern medical revolution that has changed the world. Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse Want to find Crash Course elsewhere on the internet Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter -" [YouTube Link](https://youtube.com/watch?v=1PLBmUVYYeg) 2014-07-25T01:22Z 16.9M followers, 3.5M engagements "Making Time Management Work for You: Crash Course Business - Soft Skills #10 Most of us struggle with time management. It's normal. But things need to get done both at work and in your personal life. So in this episode of Crash Course Business Evelyn gives us all some ways to structure our checklist and make sure we get our work done while still not forgetting to take care of ourselves. *** Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following patrons for their generous monthly contributions that help keep Crash" [YouTube Link](https://youtube.com/watch?v=2Si7ah_h32s) 2019-05-15T21:00Z 16.9M followers, 339K engagements "Who Was Karl Marx And Why Is Everyone Still Talking About Him To some Marxism is the solution to all capitalisms problems. To others its a major threat to democracy. But what did Karl Marx really say about capitalism and communism and how can that help shape our discussions today Crash Course Political Theory #6 Introduction: "The Specter of Communism" 00:00 Who Was Marx 0:37 The Problem of Capitalism 4:17 The Mondragon Corporation 6:22 The Proletariat Revolution 8:04 Critiquing Marx 10:04 Review & Credits 11:41 Sources:" [YouTube Link](https://youtube.com/watch?v=3imIf8NAcWQ) 2024-12-19T17:00Z 16.9M followers, 343.8K engagements "Keyboards & Command Line Interfaces: Crash Course Computer Science #22 Today we are going to start our discussion on user experience. We've talked a lot in this series about how computers move data around within the computer but not so much about our role in the process. So today we're going to look at our earliest form of interaction through keyboards. We'll talk about how the keyboard got its qwerty layout and then we'll track its evolution in electronic typewriters and eventually terminals with screens. We are going to focus specifically on text interaction through command line interfaces" [YouTube Link](https://youtube.com/watch?v=4RPtJ9UyHS0) 2017-08-02T21:12Z 16.9M followers, 452.5K engagements "Thermodynamics: Crash Course Physics #23 Have you ever heard of a perpetual motion machine More to the point have you ever heard of why perpetual motion machines are impossible One of the reasons is because of the first law of thermodynamics In this episode of Crash Course Physics Shini talks to us about thermodynamics and entropy. Also we learn about isovolumetric isobaric isothermal and adiabatic processes. It'll all make sense in a minute -- Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios -- Want to find Crash Course elsewhere on the internet" [YouTube Link](https://youtube.com/watch?v=4i1MUWJoI0U) 2016-09-15T21:27Z 16.9M followers, 2M engagements "Supervised Learning: Crash Course AI #2 Today were going to teach John Green Bot how to tell the difference between donuts and bagels using supervised learning Supervised learning is the process of learning WITH training labels and is the most widely used kind of learning with it comes to AI - helping with stuff like tagging photos on Facebook and filtering spam from your email. Were going to start small today and show how just a single neuron (or perceptron) is constructed and explain the differences between precision and recall. Next week we'll build our first neural network. Read more" [YouTube Link](https://youtube.com/watch?v=4qVRBYAdLAo) 2019-08-16T21:15Z 16.9M followers, 478.4K engagements "Pre-Columbian Theater Spanish Empire and Sor Juana: Crash Course Theater #22 This week we're headed to the Americas to learn about the theater that existed there prior to the arrival of Europeans how the theater of the Spanish influenced it and the impact of Sor Juana Inez de la Cruz playwrighting Spanish nun extraordinaire. Also check out America from Scratch the new series from PBS Digital Studios: http://bit.ly/amscratch_sub Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following Patrons for their generous monthly" [YouTube Link](https://youtube.com/watch?v=5gxHbYI0uy4) 2018-07-21T18:30Z 16.9M followers, 122K engagements "The New Deal: Crash Course US History #34 In which John Green teaches you about the New Deal which was president Franklin D. Roosevelt's plan to pull the United States out of the Great Depression of the 1930s. Did it work Maybe. John will teach you about some of the most effective and some of the best-known programs of the New Deal. They weren't always the same thing. John will tell you who supported the New Deal and who opposed it. He'll also get into how the New Deal changed the relationship between the government and citizens and will even reveal just how the Depression ended. (hint: it" [YouTube Link](https://youtube.com/watch?v=6bMq9Ek6jnA) 2013-10-18T19:59Z 16.9M followers, 5M engagements "Screens & 2D Graphics: Crash Course Computer Science #23 Today we begin our discussion of computer graphics. So we ended last episode with the proliferation of command line (or text) interfaces which sometimes used screens but typically electronic typewriters or teletypes onto paper. But by the early 1960s a number of technologies were introduced to make screens much more useful from cathode ray tubes and graphics cards to ASCII art and light pens. This era would mark a turning point in computing - computers were no longer just number crunching machines but potential assistants interactively" [YouTube Link](https://youtube.com/watch?v=7Jr0SFMQ4Rs) 2017-08-09T22:15Z 16.9M followers, 395.7K engagements "Quantum Mechanics - Part 1: Crash Course Physics #43 What is light That is something that has plagued scientists for centuries. It behaves like a wave. and a particle. what Is it both In this episode of Crash Course Physics Shini introduces the idea of quantum mechanics and how it helps us understand light. Also there's this thing called the ULTRAVIOLET CATASTROPHE -- Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios -- Want to find Crash Course elsewhere on the internet Facebook - http://www.facebook.com/YouTubeCrashC. Twitter -" [YouTube Link](https://youtube.com/watch?v=7kb1VT0J3DE) 2017-03-03T15:59Z 16.9M followers, 2.2M engagements "Cell Membranes: How Does Stuff Get Into Your Cells: Crash Course Biology #24 The cell membrane is a protein-studded phospholipid bilayer that not only protects our cells but also regulates what goes in and out. In this episode of Crash Course Biology well look at the structure of the bilayer learn about its discovery and explore the many ways substances can be transported into and out of cells. Chapters: Introduction to the Cell Membrane 00:00 Membrane Structure 2:10 Membrane Proteins 4:53 Membrane Transport 7:07 Review & Credits 11:54 This series was produced in collaboration with HHMI" [YouTube Link](https://youtube.com/watch?v=9Ia8zH-qMZw) 2023-12-19T17:00Z 16.9M followers, 245.4K engagements "What is Climate Change: Crash Course Climate & Energy #1 We know that temperatures on Earth have fluctuated dramatically in the past but we also know that by burning fossil fuels we are causing temperatures to rise faster than ever. In this episode of Crash Course Climate and Energy well introduce some core concepts that will help us throughout the series like the difference between climate and weather and take a look back through the Earths history at other periods of significant climate change. Chapters: Introduction: Climate Change 00:00 The Greenhouse Effect 2:16 Earth's Climate Record" [YouTube Link](https://youtube.com/watch?v=9PFhrpyWV-w) 2022-12-07T17:00Z 16.9M followers, 250.7K engagements "Plant Cells: Crash Course Biology #6 Hank describes why plants are so freaking amazing - discussing their evolution and how their cells are both similar to & different from animal cells. Watching this after [----] Here's an updated video about plant cells from Crash Course Botany: https://youtu.be/y9BLCfcUcFg Table of Contents annotations: [--]. Introduction 0:00 [--]. Plant Evolution 0:56 [--]. Eukaryotic vs. Prokaryotic Cells 2:33 [--]. Cellulose and Lignin 3:58 [--]. Plastids and Chloroplasts 7:05 [--]. Central Vacuole 8:10 This video uses sounds from Freesound.org Crash Course is on Patreon You can support" [YouTube Link](https://youtube.com/watch?v=9UvlqAVCoqY) 2012-03-05T21:50Z 16.9M followers, 3.4M engagements "The Power of Motivation: Crash Course Psychology #17 Feeling motivated Even if you are do you know why The story of Aaron Ralston can tell us a lot about motivation. In this episode of Crash Course Psychology Hank tells us Ralston's story as well as [--] theories of motivation and some evolutionary perspectives on motivation. Want more videos about psychology Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych -- Chapters: Introduction: Motivation 00:00 What is Motivation 1:08 Evolutionary Perspective: Instincts 1:29 Drive-Reduction Theory: Homeostasis & Incentives" [YouTube Link](https://youtube.com/watch?v=9hdSLiHaJz8) 2014-06-02T23:22Z 16.9M followers, 3.2M engagements "Controversy of Intelligence: Crash Course Psychology #23 So how many different kinds of intelligence are there And what is the G-Factor Eugenics Have you ever taken an IQ Test All of these things play into the fascinating and sometimes icky history of Intelligence Testing. In this episode of Crash Course Psychology Hank talks us through some of the important aspects of that history. as well as Nazis. Hey I said some of it was icky. Want more videos about psychology Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych -- Chapters: Introduction: Defining" [YouTube Link](https://youtube.com/watch?v=9xTz3QjcloI) 2014-07-21T18:43Z 16.9M followers, 3.5M engagements "How Rivers Shape the Landscape: Crash Course Geography #23 Today we're going to talk about rivers and how these dynamic delicate yet powerful systems are able to constantly change the landscape. We'll focus on the Zambezi River in Southeast Africa following its main features from the tributaries that feed into it in the upper course to the deafening wonder that is Mosi-oa-Tunya waterfall (also called as Victoria Falls) in the middle course all the way to the delta as the river flows into the Indian Ocean. Along the way we'll teach you all about why rivers meander why some rivers have rapids" [YouTube Link](https://youtube.com/watch?v=CDEj62HGNkk) 2021-08-10T16:15Z 16.9M followers, 323.1K engagements "Is Atheism a Religion: Crash Course Religions #13 Atheism is far from new but the various ways that people say no thank you to belief in gods deities or particular religions are so diverse that theyve had a huge impact on world belief systems. In this episode of Crash Course Religions we break down the different flavors of atheism and nonbelief and ask the question Is atheism a religion Introduction: Is God Dead 00:00 The History of Atheism 1:13 Atheism Today 3:17 To Believe or Not to Believe 4:20 Atheism Around the World 5:29 Atheism as Critique 7:02 Qualities of Religion & Atheism 8:15" [YouTube Link](https://youtube.com/watch?v=CZXFZAxX3UA) 2024-12-03T17:00Z 16.9M followers, 240.7K engagements "How World War I Started: Crash Course World History [---] In which John Green teaches you about World War I and how it got started. Crash Course doesn't usually talk much about dates but the way that things unfolded in July and August of [----] is kind of important to understanding the Great War. You'll learn about Franz Ferdinand Gavrilo Princip the Black Hand and why the Serbian nationalists wanted to kill the poor Archduke. You'll also learn who mobilized first and who exactly started the war. Sort of. Actually there's no good answer to who started the war but we give it a shot anyway. Crash" [YouTube Link](https://youtube.com/watch?v=Cd2ch4XV84s) 2014-09-13T00:07Z 16.9M followers, 7M engagements "What are the Patterns of Border Conflicts Crash Course Geography #37 Today were going to take a closer look at borders and the stories they tell. When we look at a map the shapes were seeing can seem so permanent but a map is just a snapshot of the Earth at a particular time and by looking a countries shape (and how it has changed across time) we can learn so much about how power moves and the ebb and flow of conflict. Well talk about the different types of borders and power dynamics at play in Armenia and Azerbaijan and even look to the oceans as we explore conflict in the South China Sea." [YouTube Link](https://youtube.com/watch?v=CgaZGbzFK1s) 2021-12-13T18:43Z 16.9M followers, 120.9K engagements "Joints: Crash Course Anatomy & Physiology #20 We continue our look at your bones and skeletal system skipping over the silly kid's song in favor of a more detailed look at your axial and appendicular skeleton. This episode also talks about the structural and functional classifications of your joints and the major types of body movement that they facilitate. Pssst. we made flashcards to help you review the content in this episode Find them on the free Crash Course App Download it here for Apple Devices: https://apple.co/3d4eyZo Download it here for Android Devices: https://bit.ly/2SrDulJ" [YouTube Link](https://youtube.com/watch?v=DLxYDoN634c) 2015-05-26T21:00Z 16.9M followers, 4.1M engagements "How Does Disease Move Crash Course Geography #34 From outbreaks of measles in the United States and cholera in Haiti to patterns of lead poisoning near gold mines in Nigeria medical geographers play an important role in tracking disease in the landscape. Today we're going to look at strategies medical geographers use to help as many people as possible achieve the highest level of health possible. Our sources: https://docs.google.com/document/d/1ldkfmEnwz4BCE76sxR1seA7d2L0jyVxX4Bc9YH0Tqog/editusp=sharing Watch our videos and review your learning with the Crash Course App Download here for" [YouTube Link](https://youtube.com/watch?v=DaHTOFphlMY) 2021-11-15T19:35Z 16.9M followers, 99.9K engagements "☁ What is a Cloud Crash Course Geography #10 In addition to just being beautiful one-of-a-kind panoramas in the sky clouds can tell us so much about how energy and weather patterns flow around the globe. Today we'll talk about how clouds form the three main types (cirrus status and cumulus) explain how and why we get rain and end with a discussion on humidity and how high humidity can feel hot and sticky on a warm day but comfortable on a cold day. So join us and countless people throughout history and look up -- at the clouds Watch our videos and review your learning with the Crash Course" [YouTube Link](https://youtube.com/watch?v=EK_UOLsN72Q) 2021-03-08T21:22Z 16.9M followers, 420.8K engagements "The Facts about Fact Checking: Crash Course Navigating Digital Information #2 We're off to fact-checking school. This time John Green is teaching you how to fact-check like the pros. We're going to walk through the steps that professionals follow including figuring out who is behind the information we read why they're sharing that information and what kind of evidence exists to back up the claim. We'll also talk about the difference between skepticism and cynicism. Special thanks to our partners from MediaWise who helped create this series: The Poynter Institute The Stanford History Education" [YouTube Link](https://youtube.com/watch?v=EZsaA0w_0z0) 2019-01-15T21:36Z 16.9M followers, 748K engagements "Taxes & Smuggling - Prelude to Revolution: Crash Course US History #6 In which John Green teaches you about the roots of the American Revolution. The Revolution did not start on July [--] [----]. The Revolutionary War didn't start on July [--] either. (as you remember I'm sure the Revolution and the Revolutionary War are not the same thing) The shooting started on April [--] [----] at Lexington and/or Concord MA. Or the shooting started with the Boston Massacre on March [--] [----]. At least we can pin down the Declaration of Independence to July [--] [----]. Except that most of the signers didn't sign until" [YouTube Link](https://youtube.com/watch?v=Eytc9ZaNWyc) 2013-03-07T23:50Z 16.9M followers, 5.3M engagements "Medieval China: Crash Course History of Science #8 Like Egypt Sumer and Mesoamerica ancient China represents a hydraulic civilizationone that maintained its population by diverting rivers to aid in irrigationand one that developed writing thousands of years ago. Today were going to focus on the time of the Northern and Southern Song Dynasties a time of great technical innovation. But before we get to the Song lets take a tour through the ages and explore key elements of Chinese scientific culture. *** Crash Course is on Patreon You can support us directly by signing up at" [YouTube Link](https://youtube.com/watch?v=F6Su3rBxea8) 2018-05-21T22:30Z 16.9M followers, 865.6K engagements "The Heart Part [--] - Heart Throbs: Crash Course Anatomy & Physiology #26 Today we're talking about the heart and heartthrobs -- both literal and those of the televised variety. Hank explains how your hearts pacemaker cells use leaky membranes to generate their own action potentials and how the resulting electricity travels through the cardiac conduction pathway from SA Node to Purkinje fibers allowing your heart to contract. He's also going to make you better able to spot inaccuracies in medical dramas by explaining how defibrillators work to reset the rhythm of your heart. Pssst. we made" [YouTube Link](https://youtube.com/watch?v=FLBMwcvOaEo) 2015-07-13T22:02Z 16.9M followers, 3.2M engagements "Nuclear Chemistry Part [--] - Fusion and Fission: Crash Course Chemistry #39 Continuing our look at Nuclear Chemistry Hank takes this episode to talk about Fusion and Fission. What they mean how they work their positives negatives and dangers. Plus E=mc2 Mass Defect and Applications of Fission and Fusion in the real world Pssst. we made flashcards to help you review the content in this episode Find them on the free Crash Course App Download it here for Apple Devices: https://apple.co/3d4eyZo Download it here for Android Devices: https://bit.ly/2SrDulJ -- Table of Contents E=mc2 Mass Defect" [YouTube Link](https://youtube.com/watch?v=FU6y1XIADdg) 2013-11-19T21:40Z 16.9M followers, 1.3M engagements "Tribal Sovereignty Explained: Ep [--] of Crash Course Native American History What is tribal sovereignty In this episode of Crash Course Native American History well explore how tribes can and cant govern themselves and why sovereignty isnt something the U.S. ever gave to tribes its an inherent right they already had. Introduction: The Chinook 00:00 What is tribal sovereignty 0:42 Tribal sovereignty in the US 1:57 Plenary power 3:23 The benefits of tribal sovereignty 5:39 The limitations of tribal sovereignty 8:16 Review & Credits 9:59 Sources:" [YouTube Link](https://youtube.com/watch?v=GgzR-RSfc9U) 2025-05-13T16:00Z 16.9M followers, 143.5K engagements "Biological Molecules - You Are What You Eat: Crash Course Biology #3 Hank talks about the molecules that make up every living thing - carbohydrates lipids and proteins - and how we find them in our environment and in the food that we eat. Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse Want to find Crash Course elsewhere on the internet Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Instagram - https://www.instagram.com/thecrashcourse/ CC Kids:" [YouTube Link](https://youtube.com/watch?v=H8WJ2KENlK0) 2012-02-13T23:53Z 16.9M followers, 7.6M engagements "What Is Myth Crash Course World Mythology #1 Welcome to Crash Course World Mythology our latest adventure (and this series may be literally adventurous) in education. Over the next [--] episodes or so we and Mike Rugnetta are going to learn about the world by looking at the foundational stories of a bunch of different cultural traditions. Were going to look at the ways that peoples stories define them and the ways they shape their culture. Were going to learn about gods goddesses heroes and tricksters and a lot more. Were going to walk the blurry line between myth and religion and were going to" [YouTube Link](https://youtube.com/watch?v=HeX6CX5LEj0) 2017-02-25T00:56Z 16.9M followers, 2.8M engagements "Galaxies part 1: Crash Course Astronomy #38 The Milky Way is our neighborhood in the universe. Its a galaxy and there are many others out there. Galaxies contain gas dust and billions of stars or more. They come in four main shapes: elliptical spiral peculiar and irregular. Galaxies can collide and grow in size by eating each other. Check out the Crash Course Astronomy poster here: http://store.dftba.com/products/crashcourse-astronomy-poster -- Chapters: Introduction: Galaxies 00:00 Spiral Galaxies 3:00 Elliptical Galaxies 5:22 Galactic Collisions 6:18 Peculiar Galaxies 8:46 Irregular" [YouTube Link](https://youtube.com/watch?v=I82ADyJC7wE) 2015-10-29T22:13Z 16.9M followers, 1.7M engagements "Light Is Waves: Crash Course Physics #39 The way light behaves can seem very counterintuitive and many physicists would agree with that but once you figure out light waves it all starts to make more sense In this episode of Crash Course Physics Shini shows us how we know that light exists as a wave and why that's really cool -- Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios -- Want to find Crash Course elsewhere on the internet Facebook - http://www.facebook.com/YouTubeCrashC. Twitter - http://www.twitter.com/TheCrashCourse Tumblr -" [YouTube Link](https://youtube.com/watch?v=IRBfpBPELmE) 2017-01-26T23:43Z 16.9M followers, 1.3M engagements "Federalism: Crash Course Government and Politics #4 In which Craig Benzine teaches you about federalism or the idea that in the United States power is divided between the national government and the [--] state governments. Craig will teach you about how federalism has evolved over the history of the US what powers are given to the federal government and what stuff the states control on their own. And he punches an eagle which may not surprise you at all. Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios Support is provided by Voqal: http://www.voqal.org" [YouTube Link](https://youtube.com/watch?v=J0gosGXSgsI) 2015-02-14T21:26Z 16.9M followers, 3.8M engagements "Neural Networks: Crash Course Statistics #41 Today we're going to talk big picture about what Neural Networks are and how they work. Neural Networks which are computer models that act like neurons in the human brain are really popular right now - they're being used in everything from self-driving cars and Snapchat filters to even creating original art As data gets bigger and bigger neural networks will likely play an increasingly important role in helping us make sense of all that data. Special thanks to Max Deutsch giving us permission to use his Neural Network-written Harry Potter chapter" [YouTube Link](https://youtube.com/watch?v=JBlm4wnjNMY) 2018-12-12T21:28Z 16.9M followers, 94.4K engagements "How Populations Grow and Change: Crash Course Geography #33 Is the world overpopulated or underpopulated While we worry about there being too many people for the planet to support we can also worry about how fewer people in a given place may affect the economy what may happen when there are more elderly people who need care than there are healthcare workers or even be concerned about how many people are necessary to carry on other aspects of culture. Today we'll discuss Malthusian and Boserup predictions on the planet's carrying capacity and take a close look at a popular demography tool" [YouTube Link](https://youtube.com/watch?v=JpAiBg0hrfQ) 2021-11-08T19:31Z 16.9M followers, 394.2K engagements "Files & File Systems: Crash Course Computer Science #20 Today were going to look at how our computers read and interpret computer files. Well talk about how some popular file formats like txt wave and bitmap are encoded and decoded giving us pretty pictures and lifelike recordings from just strings of 1s and 0s and well discuss how our computers are able to keep all this data organized and readily accessible to users. Youll notice in this episode that were starting to talk more about computer users not programmers foreshadowing where the series will be going in a few episodes. Pre-order our" [YouTube Link](https://youtube.com/watch?v=KN8YgJnShPM) 2017-07-12T22:07Z 16.9M followers, 879K engagements "The Personal Computer Revolution: Crash Course Computer Science #25 Today we're going to talk about the birth of personal computing. Up until the early 1970s components were just too expensive or underpowered for making a useful computer for an individual but this would begin to change with the introduction of the Altair [----] in [----]. In the years that follow we'll see the founding of Microsoft and Apple and the creation of the [----] Trinity: The Apple II Tandy TRS-80 and Commodore PET [----]. These new consumer oriented computers would become a huge hit but arguably the biggest success of the" [YouTube Link](https://youtube.com/watch?v=M5BZou6C01w) 2017-08-23T21:08Z 16.9M followers, 362.1K engagements "White Dwarfs & Planetary Nebulae: Crash Course Astronomy #30 Today Phil follows up last weeks look at the death of low mass stars with what comes next: a white dwarf. White dwarfs are incredibly hot and dense objects roughly the size of Earth. They also can form planetary nebulae: huge intricately detailed objects created when the wind blown from the dying stars is lit up by the central white dwarf. They only last a few millennia. The Sun probably wont form one but higher mass stars do. Check out the Crash Course Astronomy solar system poster here:" [YouTube Link](https://youtube.com/watch?v=Mj06h8BeeOA) 2015-08-27T21:00Z 16.9M followers, 1.2M engagements "Shaping Public Opinion: Crash Course Government and Politics #34 So today Craig is going to talk about where our political opinions come from. Of course most peoples politics are grounded in their ideologies but there are also other external influences such as the government itself interest groups and the media. So we're going to talk about how these influencers factor into the overall public opinion and how their roles have changed over time. Now this stuff may seem like common sense but its important to know where our opinions come from especially when you consider how quickly the media" [YouTube Link](https://youtube.com/watch?v=NflULVECAFQ) 2015-10-09T23:04Z 16.9M followers, 614.4K engagements "A World Without Governments Anarchism Explained The word anarchy is synonymous with chaos but what does it mean to political theorists In this episode of Crash Course Political Theory we explore the theories and practices of anarchism. Crash Course Political Theory #7 Introduction: 00:00 What Is Anarchy 0:42 Classical Anarchy 3:28 Collectivism 4:54 Anarchist Communism 5:39 Modern Anarchy 6:39 Review & Credits 10:30 Special thanks to Chris Boland for the use of his portrait of Rebecca Solnit / www.chrisboland.com Sources:" [YouTube Link](https://youtube.com/watch?v=P-Ibq-9wulQ) 2025-01-02T17:00Z 16.9M followers, 302.8K engagements "High Mass Stars: Crash Course Astronomy #31 Massive stars fuse heavier elements in their cores than lower-mass stars. This leads to the creation of heavier elements up to iron. Iron robs critical energy from the core causing it to collapse. The shock wave together with a huge swarm of neutrinos blasts through the stars outer layers causing it to explode. The resulting supernova creates even more heavy elements scattering them through space. Also happily were in no danger from a nearby supernova. Check out the Crash Course Astronomy solar system poster here:" [YouTube Link](https://youtube.com/watch?v=PWx9DurgPn8) 2015-09-10T21:00Z 16.9M followers, 2.2M engagements "Napoleon Bonaparte: Crash Course European History #22 We try not to get into too much great man history here at Crash Course but we have to admit: Napoleon Bonaparte is a pretty big deal. Join us as we track the rise further rise fall rise fall mortal fall and posthumous rise of Napoleon. This guy changed France he changed Europe and in a lot of ways he changed the world. Sources -Al-Jabarti Abd al-Rahman Napoleon in Egypt: Al-Jabartis Chronicle of the French Occupation of [----] Shmuel Moreh ed. Princeton: Markus Wiener [----]. -Bell David A. Napoleon: A Concise Biography. New York: Oxford" [YouTube Link](https://youtube.com/watch?v=Pd6E38FfuMg) 2019-10-22T02:04Z 16.9M followers, 2.7M engagements "What is a Game: Crash Course Games #1 Welcome to Crash Course Games In this series our host Andre Meadows is going to discuss the history and science of games. Were going to talk about video games of course but also board games role playing games card games even sports But before we get ahead of ourselves we are going to look at what a game actually is who is playing these games and what they are doing to us. It turns out these answers arent as obvious as they would seem but one thing is definitely clear: games make up a huge portion of most peoples lives and we think that can be a great" [YouTube Link](https://youtube.com/watch?v=QPqR2wOs8WI) 2016-04-01T23:59Z 16.9M followers, 1M engagements "The Dark Ages.How Dark Were They Really: Crash Course World History #14 John Green teaches you about the so-called Dark Ages which it turns out weren't as uniformly dark as you may have been led to believe. While Europe was indeed having some issues many other parts of the world were thriving and relatively enlightened. John covers European Feudalism the cultural blossoming of the Islamic world and the scientific and artistic advances in China all during these "Dark Ages." Along the way John will raise questions about the validity of Europe's status as a continent reveal the best and worst" [YouTube Link](https://youtube.com/watch?v=QV7CanyzhZg) 2012-04-26T23:58Z 16.9M followers, 8.7M engagements "Media & Money: Crash Course Media Literacy #5 Media isnt just movies and newspapers and TV shows its also a part of society that involves a lot of money. And all that money has implications for the media that gets created. Media is created by people -- a range of people making a range of decisions and earning a range of different paychecks to do it. Those decisions matter and understanding how money affects those decisions is an essential component of media literacy. Introduction: Your Media on Money 0:00 Let's say you're a movie director 1:04 Media is made 2:01 Purpose or why media is" [YouTube Link](https://youtube.com/watch?v=QpYrSLiIoKo) 2018-03-27T20:01Z 16.9M followers, 250.1K engagements "Let's Talk About Sex: Crash Course Psychology #27 Sex is complicated for different reasons in different cultures. But it's the entire purpose of life so there's no reason to blush. In this episode of Crash Course Psychology Hank talks about Kinsey Masters and Johnson Sexuality Gender Identity and Hormones and even looks into the idea of why we have sex. There's a lot to go through here. Want more videos about psychology Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych -- Chapters: Introduction: Alfred Kinsey 00:00 Biological Sex & Gender Identity 2:01 Masters" [YouTube Link](https://youtube.com/watch?v=Qymp_VaFo9M) 2014-08-18T23:57Z 16.9M followers, 7.5M engagements "Population Ecology: The Texas Mosquito Mystery - Crash Course Ecology #2 Population ecology is the study of groups within a species that interact mostly with each other and it examines how they live together in one geographic area to understand why these populations are different in one time and place than they are in another. How is that in any way useful to anyone ever Hank uses the example of the West Nile virus outbreak in Texas to show you in this episode of Crash Course: Ecology. Table of Contents 1) Density & Dispersion 02:03 2) Population Growth 03:07 3) Limiting Factors 03:45 a)" [YouTube Link](https://youtube.com/watch?v=RBOsqmBQBQk) 2012-11-12T22:45Z 16.9M followers, 1.9M engagements "Rap and Hip Hop: Crash Course Black American History #47 Music is an integral part of Black American culture. Today Clint Smith will teach you about rap & hip hop and the cultural significance of artists including Public Enemy Wu-Tang Clan the Notorious B.I.G. Tupac N.W.A. Queen Latifah and Missy Elliott. And he just might break dance while doing it. Clint's book How the Word is Passed is available now https://bookshop.org/books/how-the-word-is-passed-a-reckoning-with-the-history-of-slavery-across-america/9780316492935 SOURCES: https://www.nbcnews.com/id/wbna19680493 Janell Hobson and R." [YouTube Link](https://youtube.com/watch?v=RHCA5b9TkVg) 2022-09-20T19:00Z 16.9M followers, 484.9K engagements "The Silent Era: Crash Course Film History #9 The Silent Era of Hollywood set a lot of things into motion in terms of how movies were made and sold. Big stars were one of the main ways studios tried to make their movies stand apart from one another and get the public to make choices at the cinema. But this also gave a lot of power to those stars to command a lot of money. In this episode of Crash Course Film History we take a look at the Silent Era of Hollywood and people like Charlie Chaplin. Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios Want to know" [YouTube Link](https://youtube.com/watch?v=ROOV9tucra0) 2017-06-08T21:31Z 16.9M followers, 404.1K engagements "Education In Society: Crash Course Sociology #40 Today well explore the history of education as a social institution with a specific focus on how the US organizes its educational system. Well look at education through the lenses of some sociological paradigms: structural functionalist approaches (including some of the manifest and latent functions associated with education) and a symbolic interactionist approach to education that shows us how self-fulfilling prophecies in educational settings contribute to differences in academic outcomes for students. Crash Course is made with Adobe Creative" [YouTube Link](https://youtube.com/watch?v=S294zRodS_4) 2018-01-15T21:48Z 16.9M followers, 600.8K engagements "Christianity from Judaism to Constantine: Crash Course World History #11 In which John Green teaches you the history of Christianity from the beginnings of Judaism and the development of monotheism right up to Paul and how Christianity stormed the Roman Empire in just a few hundred years. Along the way John will cover Abram/Abraham the Covenant the Roman Occupation of Judea and the birth life death and legacy of Jesus of Nazareth. No flame wars Let's keep the commentary civil. Chapters: Introduction: The Son of God 00:00 Understanding the Jewish Tradition 0:33 Herod and Herod - Roman Rulers" [YouTube Link](https://youtube.com/watch?v=TG55ErfdaeY) 2012-04-05T22:32Z 16.9M followers, 10.2M engagements "Venice and the Ottoman Empire: Crash Course World History #19 In which John Green discusses the strange and mutually beneficial relationship between a republic the city-state of Venice and an Empire the Ottomans--and how studying history can help you to be a better boyfriend/girlfriend. Together the Ottoman Empire and Venice grew wealthy by facilitating trade: The Venetians had ships and nautical expertise; the Ottomans had access to many of the most valuable goods in the world especially pepper and grain. Working together across cultural and religious divides they both become very rich and" [YouTube Link](https://youtube.com/watch?v=UN-II_jBzzo) 2012-05-31T21:07Z 16.9M followers, 4.5M engagements "Congressional Delegation: Crash Course Government and Politics #13 In which Craig Benzine teaches you about delegation and informal powers. What are all these federal agencies about Well the President has a lot of stuff to do as the chief executive and as much as Americans like to talk about personal responsibility the President can't really do all this stuff alone. Because it's a huge job Same deal with Congress. So they delegate authority. This is where all the government agencies and stuff come from. Congress creates them to actually get around to enforcing laws. You'll learn about stuff" [YouTube Link](https://youtube.com/watch?v=UVboes68PkQ) 2015-04-24T22:02Z 16.9M followers, 556.5K engagements "To The Moon & Mars - Aerospace Engineering: Crash Course Engineering #34 This week were exploring aerospace engineering and its two main fields: aeronautical engineering and astronautical engineering. Well explore life & buoyancy propulsion systems and the challenges of managing the human body in space. Crash Course Engineering is produced in association with PBS Digital Studios: https://www.youtube.com/playlistlist=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV PBS Space Time: https://www.youtube.com/channel/UC7_gcs09iThXybpVgjHZ_7g *** RESOURCES: https://www.history.com/topics/space-race" [YouTube Link](https://youtube.com/watch?v=UvtYn2j78gw) 2019-01-31T21:04Z 16.9M followers, 368.4K engagements "Due Process of Law: Crash Course Government and Politics #28 This week Craig is going to continue our discussion of due process. Technically we started last week with the 4th amendment and search and seizure but this week were going to look at the 5th and 6th amendments and how they ensure a fair trial. Well talk about some stuff you tend to hear a lot on tv like your right to an attorney and a jury of your peers and also terms like double jeopardy and pleading the fifth. Now this stuff can get pretty complicated which is where lawyers come in handy but its important to know your liberties to" [YouTube Link](https://youtube.com/watch?v=UyHWRXAAgmQ) 2015-08-22T00:20Z 16.9M followers, 1.1M engagements "Political Parties: Crash Course Government and Politics #40 Today Craig is going to talk about political parties and their role in American politics. So when most people think about political parties they associate them with the common ideologies of the voters and representatives within that party but the goal of a party is NOT to influence policies. The role of political parties is much simpler: to win control of the government. So today were going got talk about why we have political parties in the first place and then finish with the five functions they use in reaching that goal. Its a lot" [YouTube Link](https://youtube.com/watch?v=VEmOUHxessE) 2015-12-05T01:17Z 16.9M followers, 2.2M engagements "Aggression vs. Altruism: Crash Course Psychology #40 In our final episode of Crash Course Psychology Hank discusses the ideas of Aggression and Altruism. These two things are difficult to understand and explain so sit tight and get ready to run the gauntlet of human emotions. Want more videos about psychology Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych -- Chapters: Introduction: Robber's Cave Experiment 00:00 Conflict vs. Cooperation 2:26 Aggression 3:05 Genetic Neurological & Biochemical Reasons for Aggression 3:26 Frustration-Aggression Hypothesis 4:24" [YouTube Link](https://youtube.com/watch?v=XoTx7Rt4dig) 2014-11-24T22:00Z 16.9M followers, 1.7M engagements "Heat Transfer: Crash Course Engineering #14 Today were talking about heat transfer and the different mechanisms behind it. Well explore conduction the thermal conductivity of materials convection boundary layers and radiation. Crash Course Engineering is produced in association with PBS Digital Studios: https://www.youtube.com/playlistlist=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV *** RESOURCES: https://www.grc.nasa.gov/www/k-12/airplane/thermo1.html http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/firlaw.html http://coolcosmos.ipac.caltech.edu/cosmic_classroom/light_lessons/thermal/transfer.html" [YouTube Link](https://youtube.com/watch?v=YK7G6l_K6sA) 2018-08-23T20:02Z 16.9M followers, 858K engagements "Intro to Genetics: Why Your Cat Looks Like That: Crash Course Biology #31 How do traits get passed down in our DNA And what do genes have to do with cat fur In this episode of Crash Course Biology well untangle the simplest patterns of inheritance and reassure our redheaded friendsyoure not going anywhere. Chapters: Are Redheads Going Extinct 00:00 Alleles & Traits 1:32 Patterns of Inheritance 4:50 Autosomal Dominance 5:56 Incomplete Dominance 7:51 Codominance 8:47 Review & Credits 10:20 This series was produced in collaboration with HHMI BioInteractive committed to empowering educators and" [YouTube Link](https://youtube.com/watch?v=YnJPbphsoMY) 2024-02-20T17:00Z 16.9M followers, 177.9K engagements "Ancient Egypt: Crash Course World History #4 In which John covers the long long history of ancient Egypt including the Old Middle and New Kingdoms and even a couple of intermediate periods. Learn about mummies pharaohs pyramids and the Nile with John Green. Chapters: Introduction: Ancient Egypt 00:00 How The Nile Shaped Egypt 1:57 The Old Kingdom of Egypt 4:02 The Middle Kingdom of Egypt 6:29 The New Kingdom of Egypt 7:54 An Open Letter to King Tut 9:18 Credits 11:14 Resources: Mummies: https://goo.gl/BvAdmj Pyramids: http://goo.gl/aCov2j Crash Course is on Patreon You can support us directly" [YouTube Link](https://youtube.com/watch?v=Z3Wvw6BivVI) 2012-02-16T20:06Z 16.9M followers, 8.5M engagements "Japan in the Heian Period and Cultural History: Crash Course World History [---] In which John Green teaches you about what westerners call the middle ages and the lives of the aristocracy.in Japan. The Heian period in Japan lasted from 794CE to 1185CE and it was an interesting time in Japan. Rather than being known for a thriving economy or particularly interesting politics the most important things to come out of the Heian period were largely cultural. There was a flourishing of art and literature in the period and a lot of that culture was created by women. The Tale of Genji by Murasaki" [YouTube Link](https://youtube.com/watch?v=ZnZEoOJ-cxE) 2015-03-05T01:35Z 16.9M followers, 3.1M engagements "Voltage Electric Energy and Capacitors: Crash Course Physics #27 So how do those defibrillators you see on TV actually work Surprise Physics can explain Okay buckle up everyone Today Shini has the task of breaking down electrical potential energy electric potential voltage capacitors energy storage and potential energy. it's a lot -- Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios -- Want to find Crash Course elsewhere on the internet Facebook - http://www.facebook.com/YouTubeCrashC. Twitter - http://www.twitter.com/TheCrashCourse Tumblr -" [YouTube Link](https://youtube.com/watch?v=ZrMltpK6iAw) 2016-10-14T20:33Z 16.9M followers, 888.4K engagements "The Reproductive System: How Gonads Go - CrashCourse Biology #34 Hank lets us in on the meaning of life at least from a biological perspective - it's reproduction which answers the essential question of all organisms: how do I make more of myself So sex how does it work Table of Contents 1) Gametes: Ova and Sperm 2:27 2) Sex Determination 4:59 3) Secondary Sexual Characteristics 6:48 4) Female Reproductive Structures 7:25 a) Uterus & Oviducts 7:40 b) Endometrium (Menstruation) 7:57 c) Cervix & Vagina 8:32 5) Male Reproductive Structures 8:45 a) Scrotum Sminferous Tubules & Epididymas 8:59 b)" [YouTube Link](https://youtube.com/watch?v=_7rsH2loIY8) 2012-09-17T20:37Z 16.9M followers, 1.2M engagements "Intro to Epidemiology: Crash Course Public Health #6 Epidemiology is the study of patterns of diseases. And most people might think that means epidemiologists are only studying things like Ebola. But the truth is much more varied. In this episode of Crash Course Public Health we'll take a look at the different ways Epidemiology is conducted including the use of.pie It'll make sense we promise. Check out our shared playlist with APHA: https://www.youtube.com/playlistlist=PLDjqc55aK3kywF2dd97_Jh5iP0d2ARhdo Vanessas channel: https://www.youtube.com/braincraft Sources:" [YouTube Link](https://youtube.com/watch?v=_luU3I03JwE) 2022-09-08T17:00Z 16.9M followers, 298.1K engagements "Social Groups: Crash Course Sociology #16 How do the groups that you're part of affect you How do you in turn affect those groups Today we are talking about how people in society come together with a look at social groups. Well look at what social groups are the different kinds of groups that exist group dynamics leadership conformity networks and more Crash Course is made with Adobe Creative Cloud. Get a free trial here: https://www.adobe.com/creativecloud.html *** Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the" [YouTube Link](https://youtube.com/watch?v=_wFZ5Dbj8DA) 2017-07-03T20:02Z 16.9M followers, 880.7K engagements "Imperialism: Crash Course World History #35 In which John Green teaches you about European Imperialism in the 19th century. European powers started to create colonial empires way back in the 16th century but businesses really took off in the 19th century especially in Asia and Africa. During the 1800s European powers carved out spheres of influence in China India and pretty much all of Africa. While all of the major (and some minor) powers in Europe participated in this new imperialism England was by far the most dominant once able to claim that the "sun never set on the British Empire." Also" [YouTube Link](https://youtube.com/watch?v=alJaltUmrGo) 2012-09-20T21:22Z 16.9M followers, 7.1M engagements "Cybersecurity: Crash Course Computer Science #31 Cybersecurity is a set of techniques to protect the secrecy integrity and availability of computer systems and data against threats. In todays episode were going to unpack these three goals and talk through some strategies we use like passwords biometrics and access privileges to keep our information as secure but also as accessible as possible. From massive Denial of Service or DDos attacks to malware and brute force password cracking there are a lot of ways for hackers to gain access to your data so well also discuss some strategies like" [YouTube Link](https://youtube.com/watch?v=bPVaOlJ6ln0) 2017-10-11T21:37Z 16.9M followers, 1.2M engagements "The Medieval Islamicate World: Crash Course History of Science #7 The religion of Islam significantly influenced knowledge-making in the greater Mediterranean and western Asian world. Islamicate scholarsmeaning people influenced by Islamic civilization regardless of their religious viewsgave us terms such as algebra azimuth algorithm alcohol alkali and alembic. Well dive into Islamic medicine and philosophers such as the great Persian polymath Ibn Sina in future episodes. For now lets explore the beginnings of Islamicate natural philosophy. It's really cool you guys *** Crash Course is on" [YouTube Link](https://youtube.com/watch?v=bkVsus8Ehxs) 2018-05-14T22:00Z 16.9M followers, 1.3M engagements "What Are Volcanoes Crash Course Geography #21 Today were going to take a closer look at these beautiful but dangerous landforms as we explore the different types of volcanoes and trace the patterns of volcanic activity around the world. From the explosive power of a stratovolcano like Mount St. Helens in Washington to the quiet but consistent eruptions of a shield volcano like Klauea in Hawaii volcanoes are like windows into the center of the Earth helping us understand more about how it all works. Watch our videos and review your learning with the Crash Course App Download here for Apple" [YouTube Link](https://youtube.com/watch?v=cnKoTlUaqAs) 2021-07-26T20:10Z 16.9M followers, 377K engagements "The Americas and Time Keeping: Crash Course History of Science #5 In this episode of Crash Course History of Science we travel to the Americas to ask the question "When are we" and get some answers. We'll look at the Maya Inca and Olmec civilizations and how they recorded their science. *** Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever: Mark Brouwer Glenn Elliott Justin Zingsheim Jessica Wode Eric Prestemon" [YouTube Link](https://youtube.com/watch?v=dCBDUDwaeCA) 2018-05-01T00:28Z 16.9M followers, 617.8K engagements "Crash Course Psychology Preview Welcome to Crash Course Psychology Want more videos about psychology Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse Want to find Crash Course elsewhere on the internet Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Instagram - https://www.instagram.com/thecrashcourse/ CC Kids: http://www.youtube.com/crashcoursekids" [YouTube Link](https://youtube.com/watch?v=eal4-A89IWY) 2014-01-27T23:19Z 16.9M followers, 1.9M engagements "Feeling All the Feels: Crash Course Psychology #25 In this episode of Crash Course Psychology Hank talks about these things called "Emotions". What are they And why do we need them Want more videos about psychology Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych -- Chapters: Introduction: Emotions 00:00 Theories on Emotions 2:11 Cognition & Emotion 3:35 The Spillover Effect 4:22 Top-Down vs Bottom-Up Approaches to Cognitive Processing 6:09 The Autonomic Nervous System 8:10 Optimal Arousal 8:39 Review & Credits 10:03 -- Crash Course is on Patreon You can" [YouTube Link](https://youtube.com/watch?v=gAMbkJk6gnE) 2014-08-05T05:18Z 16.9M followers, 2.3M engagements "Vascular Plants = Winning - Crash Course Biology #37 Hank introduces us to one of the most diverse and important families in the tree of life - the vascular plants. These plants have found tremendous success and their secret is also their defining trait: conductive tissues that can take food and water from one part of a plant to another part. Though it sounds simple the ability to move nutrients and water from one part of an organism to another was an evolutionary breakthrough for vascular plants allowing them to grow exponentially larger store food for lean times and develop features that" [YouTube Link](https://youtube.com/watch?v=h9oDTMXM7M8) 2012-10-08T21:37Z 16.9M followers, 1.7M engagements "Frankenstein Part 2: Crash Course Literature [---] In which John Green continues to teach you about Mary Shelley's Frankenstein. You'll learn about romantic vs Romantic the latter of which is a literary movement. John will also look at a few different critical readings of Frankenstein and you'll learn about Victor's motivations. We'll also look a little bit at the moral limitations of science if there are any. Consider supporting local bookstores by purchasing your books through our Bookshop affiliate link https://bookshop.org/shop/complexly or at your local bookseller. Crash Course is on" [YouTube Link](https://youtube.com/watch?v=hRDjmyEvmBI) 2014-04-03T22:19Z 16.9M followers, 1.2M engagements "Let's make a movie recommendation system: Crash Course AI #16 Follow along: https://colab.research.google.com/drive/1-v9cw18wTDjaCUlECKHsQnHeisLKyG8U We need to save Jabril and John Green Bots movie nights. Jabril generally likes action movies and John Green Bot likes romantic movies but they need to find something that they can both watch and enjoy together. Today were going to build a movie recommender systems to find that perfect movie. With the help of the LensKit library our AI will use existing movie ratings from the MovieLens dataset and personalized ratings from Jabril and John Green" [YouTube Link](https://youtube.com/watch?v=iaIW3CO4rcY) 2019-11-29T21:30Z 16.9M followers, 81.3K engagements "The Death and Resurrection of Theater as.Liturgical Drama: Crash Course Theater #8 As the Roman Empire fell so did the theater. If there's anyone who hates theater and actors more than Romans it's early Christians. As Christianity ascended in the west theater declined. But fear not. This isn't the end of the series. Theater would be back and in the best subversive theater-y fashion it would return via the Catholic mass Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following Patrons for their generous monthly" [YouTube Link](https://youtube.com/watch?v=kX0jHv05FYM) 2018-04-06T20:10Z 16.9M followers, 239.8K engagements "Civil Rights & Liberties: Crash Course Government & Politics #23 Today Craig is going to give you an overview of civil rights and civil liberties. Often these terms are used interchangeably but they are actually very different. Our civil liberties contained in the Bill of Rights once only protected us from the federal government but slowly these liberties have been incorporated to protect us from the states. Well take a look at how this has happened and the supreme court cases that got us here. Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios Support is" [YouTube Link](https://youtube.com/watch?v=kbwsF-A2sTg) 2015-07-18T00:26Z 16.9M followers, 1.7M engagements "Silicon - The Internet's Favorite Element: Crash Course Chemistry #35 In this episode we talk about Silicon Valley's namesake and how network solids are at the heart of it all. Hank also discusses Solid-State Semiconductors N-Type and P-Type Semiconductors Diodes Transistors Computer Chips and Binary Code. All from the same thing that makes up sand Pssst. we made flashcards to help you review the content in this episode Find them on the free Crash Course App Download it here for Apple Devices: https://apple.co/3d4eyZo Download it here for Android Devices: https://bit.ly/2SrDulJ -- Table of" [YouTube Link](https://youtube.com/watch?v=kdy3RsZk7As) 2013-10-22T01:39Z 16.9M followers, 391.3K engagements "Training Neural Networks: Crash Course AI #4 Today were going to talk about how neurons in a neural network learn by getting their math adjusted called backpropagation and how we can optimize networks by finding the best combinations of weights to minimize error. Then well send John Green Bot into the metaphorical jungle to find where this error is the smallest known as the global optimal solution compared to just where it is relatively small called local optimal solutions and we'll discuss some strategies we can use to help neural networks find these optimized solutions more quickly. Crash" [YouTube Link](https://youtube.com/watch?v=lgKrup5oi_A) 2019-08-30T20:46Z 16.9M followers, 227.9K engagements "The Cold War and Consumerism: Crash Course Computer Science #24 Today were going to step back from hardware and software and take a closer look at how the backdrop of the cold war and space race and the rise of consumerism and globalization brought us from huge expensive codebreaking machines in the 1940s to affordable handhelds and personal computers in the 1970s. This is an era that saw huge government funded projects - like the race to the moon. And afterward a shift towards the individual consumer commoditization of components and the rise of the Japanese electronics industry. Pre-order" [YouTube Link](https://youtube.com/watch?v=m8i38Yq1wX4) 2017-08-16T21:54Z 16.9M followers, 319.4K engagements "Community Ecology II: Predators - Crash Course Ecology #5 Hank gets to the more violent part of community ecology by describing predation and the many ways prey organisms have developed to avoid it. TABLE OF CONTENTS Herbivory and Parasitism 1:43 Predatory Adaptation 3:39 Cryptic Coloration 4:25 Mullerian Mimicry 5:43 Batesian Mimicry 6:38 Resources: http://www.youtube.com/watchv=37hHBgaZymo&feature=fvwrel http://www.youtube.com/watchv=eGAeRWwQ2mA http://www.nature.com/scitable/knowledge/library/predation-herbivory-and-parasitism-13261134" [YouTube Link](https://youtube.com/watch?v=mFDiiSqGB7M) 2012-12-04T21:11Z 16.9M followers, 633.8K engagements "How to Sell Anything: Crash Course Entrepreneurship #12 It can be hard to strike the right tone or know whats going to appeal to someone but there are tricks. We can craft a narrative and use well-placed emotional appeals to tell customers a story. Even if you dont consider yourself a persuasive person you dont need a +5 charisma modifier to succeed at this crucial stage of entrepreneurship. *** Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following patrons for their generous monthly contributions that help keep Crash" [YouTube Link](https://youtube.com/watch?v=n7-wsGLc1js) 2019-11-06T22:30Z 16.9M followers, 167.1K engagements "The First Home Consoles: Crash Course Games #5 So last week Andre talked about Ataris role in the rise of the video game industry but Atari wasnt the only major player in the 1970s. So were going to step back a few years and first talk about Ralph Baer who designed the first video game console - the Magnavox Odyssey. The Odyssey would go on to inspire the industry including of course Atari but also Mattel and many others. This was the start of the first console wars and with it we see huge improvements in graphics gameplay and of course better storytelling. But well also see a flooding of the" [YouTube Link](https://youtube.com/watch?v=npOPGrAcFLg) 2016-05-07T00:13Z 16.9M followers, 349.3K engagements "Probability Part 2: Updating Your Beliefs with Bayes: Crash Course Statistics #14 Today we're going to introduce bayesian statistics and discuss how this new approach to statistics has revolutionized the field from artificial intelligence and clinical trials to how your computer filters spam We'll also discuss the Law of Large Numbers and how we can use simulations to help us better understand the "rules" of our data even if we don't know the equations that define those rules. Want to try out the law of large numbers simulation yourself More details here:" [YouTube Link](https://youtube.com/watch?v=oZCskBpHWyk) 2018-05-02T21:04Z 16.9M followers, 279.8K engagements "More Stereochemical Relationships: Crash Course Organic Chemistry #9 Enantiomers have almost all the same chemical and physical properties so it can be tough to separate them. But its still super important that we know how to tell them apart In this episode of Crash Course Organic Chemistry well recap all the types of isomers weve learned about so far and also learn about polarimetry as a way to separate enantiomers and how to predict the number of stereoisomers a molecule will have. Episode Sources: THINK BIG Must the molecules of life always be Left-Handed or Right-Handed Smithsonian" [YouTube Link](https://youtube.com/watch?v=ofFEFywbJKA) 2020-08-05T21:17Z 16.9M followers, 194.4K engagements "Meiosis: Why Are All Humans Unique: Crash Course Biology #30 Ever wonder why we arent exact clones of our parents or why siblings arent exactly alike The reason traces back to meiosis. In this episode of Crash Course Biology well discover how egg and sperm cells get made and learn why youre a totally unique remix of your parents DNA. Introduction: Why Are We All Unique 0:00 Gametes 1:33 Meiosis 4:09 The Phases of Meiosis 4:44 Nondisjunction 7:14 Why We Aren't Clones 8:18 Meiosis & Genetic Diversity 9:49 Review & Credits 11:32 This series was produced in collaboration with HHMI BioInteractive" [YouTube Link](https://youtube.com/watch?v=pj1oFx42d48) 2024-02-13T17:00Z 16.9M followers, 340.5K engagements "Why We Can Exist Crash Course Pods: The Universe #2 Head to https://policygenius.com/crashcourse to get your free life insurance quotes and see how much you could save. In Episode [--] of their journey through the history of the universe Dr. Katie Mack and John Green discuss the fundamental forces of nature the tiny ovens we know as particle colliders and how we all can exist. Chapters 00:00 - Introduction 3:17 - Particle colliders 5:45 - Protons 14:00 - The Fundamental Forces 20:33 - The Theory of Everything 27:12 - The Higgs Field 34:46 - It's Incredible That We Know This Stuff *** Crash" [YouTube Link](https://youtube.com/watch?v=qOa8djo1uLc) 2024-05-08T15:00Z 16.9M followers, 133.4K engagements "Atari and the Business of Video Games: Crash Course Games #4 Today Andre is going to talk about the rise of Atari and with it the rise of the video game industry. So if you remember from last episode we mentioned that the first arcade machine Galaxy Game happened to have a coin slot but this was just the beginning. Nolan Bushnell often considered the Father of the Video Game Industry saw the opportunity for the commercialization of video games. Bushnell founded Atari and oversaw the development of its first game - Pong. And then through some questionably ethical business strategies Bushnell" [YouTube Link](https://youtube.com/watch?v=r8gHnuv7U_o) 2016-04-22T23:56Z 16.9M followers, 400.3K engagements "Advanced CPU Designs: Crash Course Computer Science #9 So now that weve built and programmed our very own CPU were going to take a step back and look at how CPU speeds have rapidly increased from just a few cycles per second to gigahertz Some of that improvement of course has come from faster and more efficient transistors but a number hardware designs have been implemented to boost performance. And youve probably heard or read about a lot of these - theyre the buzz words attached to just about every new CPU release - terms like instruction pipelining cache FLOPS superscalar branch prediction" [YouTube Link](https://youtube.com/watch?v=rtAlC5J1U40) 2017-04-27T00:39Z 16.9M followers, 1M engagements "Foreign Aid and Remittance: Crash Course Economics #34 What is foreign aid How much foreign aid does the United States distribute each year. Comparatively not much. In fact foreign aid only accounts for a small fraction of most nations' overall spending. But it's hugely important. Foreign aid improves healthcare can promote economic growth and assists people who've been through disasters. Remittances are moneys that are sent internationally by immigrants. People move internationally to *** Crash Course is on Patreon You can support us directly by signing up at" [YouTube Link](https://youtube.com/watch?v=tAvA_cOeeOI) 2016-05-27T22:38Z 16.9M followers, 410.9K engagements "Types of Bureaucracies: Crash Course Government and Politics #16 In which Craig Benzine breaks down the different types of bureaucracies. I mean sure theyre all part of the executive branch but some work more directly with the President than others. Some bureaucracies exist solely to independently regulate industry whereas others are expected to operate like corporations and make a profit. And on top of all that some of these agencies have sub-agencies It can all get pretty complicated so well try to discuss some of the most significant agencies out there and the ones you hear a lot about on" [YouTube Link](https://youtube.com/watch?v=tIvUo3bP4Eo) 2015-05-15T22:28Z 16.9M followers, 950.5K engagements "The Milky Way: Crash Course Astronomy #37 Today were talking about our galactic neighborhood: The Milky Way. Its a disk galaxy a collection of dust gas and hundreds of billions of stars with the Sun located about halfway out from the center. The disk has grand spiral patterns formed by the traffic jams of stars and nebulae where stars are born. The central region is shaped like a bar and is mostly old red stars. Theres also a halo surrounding us of old stars. Check out the Crash Course Astronomy solar system poster here: http://store.dftba.com/products/crashcourse-astronomy-poster --" [YouTube Link](https://youtube.com/watch?v=tj_QPnO8vpQ) 2015-10-22T21:00Z 16.9M followers, 1.5M engagements "War & Expansion: Crash Course US History #17 In which John Green teaches you about the Mexican-American War in the late 1840s and the expansion of the United States into the western end of North America. In this episode of Crash Course US territory finally reaches from the Atlantic coast to the Pacific Ocean. After Oregon was secured from the UK and the southwest was ceded by Mexico that is. Famous Americans abound in this episode including James K Polk (Young Hickory Napoleon of the Stump) Martin Van Buren Zachary Taylor and Winfield Scott. You'll also learn about the California Gold Rush of" [YouTube Link](https://youtube.com/watch?v=tkdF8pOFUfI) 2013-06-06T22:32Z 16.9M followers, 3.9M engagements "The Physics of Heat: Crash Course Physics #22 Have you ever wondered why we wear clothes I mean beyond the obvious. Why does wearing a jacket in the cold keep you warmer What is happening to all the heat inside your body In this episode of Crash Course Physics Shini talks about the physics of heat -- Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios -- Want to find Crash Course elsewhere on the internet Facebook - http://www.facebook.com/YouTubeCrashC. Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support" [YouTube Link](https://youtube.com/watch?v=tuSC0ObB-qY) 2016-09-08T23:17Z 16.9M followers, 882.2K engagements "Schizophrenia and Dissociative Disorders: Crash Course Psychology #32 In this episode of Crash Course Psychology Hank describes some of the most misunderstood psychological disorders out there: Schizophrenia and Dissociative Identity Disorder. Want more videos about psychology Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych -- Chapters: Introduction: Schizophrenia & Dissociative Disorders 00:00 Schizophrenia Spectrum Disorders 1:31 Psychotic Symptoms 5:04 Physiological Brain Abnormalities in Schizophrenic Patients 5:43 Diathesis Stress Model 6:49" [YouTube Link](https://youtube.com/watch?v=uxktavpRdzU) 2014-09-29T23:41Z 16.9M followers, 5.2M engagements "Intro to Big Data: Crash Course Statistics #38 Today we're going to begin our discussion of Big Data. Everything from which videos we click (and how long we watch them) on YouTube to our likes on Facebook say a lot about us - and increasingly more and more sophisticated algorithms are being designed to learn about us from our clicks and not-clicks. Today we're going to focus on some ways Big Data impacts on our lives from what liking Hello Kitty says about us to how Netflix chooses just the right thumbnail to encourage us to watch more content. And Big Data is necessarily a good thing next" [YouTube Link](https://youtube.com/watch?v=vku2Bw7Vkfs) 2018-11-14T22:00Z 16.9M followers, 215K engagements "If One Finger Brought Oil - Things Fall Apart Part 1: Crash Course Literature [---] In which John Green teaches you about Chinua Achebe's [----] novel Things Fall Apart. You'll learn about Igboland a region in modern-day Nigeria prior to the arrival of the British Empire. Achebe tells the story of Okonkwo an Igbo villager who has worked his way up from life as a sharecropped and become a respected leader in his community. Okonkwo has a tragic fall and is exiled. And then the trouble starts. British missionaries arrive and change everything. Things Fall Apart has a lot to say about colonization" [YouTube Link](https://youtube.com/watch?v=w1Kw94qjdQA) 2014-04-17T21:07Z 16.9M followers, 1.5M engagements "Divine Command Theory: Crash Course Philosophy #33 As we venture into the world of ethics there are a lot of different answers to the grounding problem for us to explore. One of the oldest and most popular is the divine command theory. But with age comes a long history of questions too such as the dilemma presented by Plato known as the Euthyphro Problem. -- All other images and video either public domain or via VideoBlocks or Wikimedia Commons licensed under Creative Commons BY 4.0: https://creativecommons.org/licenses/by/4.0/ -- Produced in collaboration with PBS Digital Studios:" [YouTube Link](https://youtube.com/watch?v=wRHBwxC8b8I) 2016-10-31T21:07Z 16.9M followers, 1.5M engagements "The Scientific Method: Crash Course Biology #2 Science offers a way of discovering and understanding the world around us driven by questions and tested with evidence. And its a twisty-turny team effort you wont find many lone geniuses out there or straight lines from hypothesis to conclusion. In this episode of Crash Course Biology well talk about the big picture of how scientific progress is made from peer review to mathematical models with some exploding eggs along the way. Chapters: Introduction to Science 00:00 The Scientific Method 2:25 Science is a Team Effort 5:18 The Scientific Theory" [YouTube Link](https://youtube.com/watch?v=xOLcZMw0hd4) 2023-06-13T16:00Z 16.9M followers, 582.5K engagements "The New Astronomy: Crash Course History of Science #13 This week on Crash Course: History of the Scientific Revolutionastronomical anomalies accrued. Meanwhile in Denmarkan eccentric rich dude constructed not one but two science castles And his humble German assistant synthesized a lot of new old and bold astronomical ideas into a single sun-centered eccentricity-positive system *** Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free" [YouTube Link](https://youtube.com/watch?v=-FYvy3_egHw) 2018-07-09T22:19Z 16.9M followers, 496.3K engagements "ATP & Respiration: Crash Course Biology #7 In which Hank does some push-ups for science and describes the "economy" of cellular respiration and the various processes whereby our bodies create energy in the form of ATP. Special thanks go to Stafford Fitness (www.staffordfitness.net) for allowing us to shoot the gym scenes in their facilities. This video uses sounds from Freesound.org Table of Contents: 1) Cellular Respiration 01:00 2) Adenosine Triphosphate 01:29 3) Glycolysis 4:13 A) Pyruvate Molecules 5:00 B) Anaerobic Respiration/Fermentation 5:33 C) Aerobic Respiration 6:45 4) Krebs Cycle" [YouTube Link](https://youtube.com/watch?v=00jbG_cfGuQ) 2012-03-12T22:18Z 16.9M followers, 11.5M engagements "The Protestant Reformation: Crash Course European History #6 You may have noticed that the internet is terrible at religious discourse. Well this is not a new phenomenon. In the early 16th century the Roman Catholic church dominated Christianity in Europe and the institution was starting to show some cracks. Tensions mounted and protests grew and eventually the Protestant Reformation happened. Martin Luther nailed his [--] Theses to the church door in Wittenberg but the Reformation doesn't exactly begin with Luther and it certainly doesn't end with him. Today we're looking at how and why the" [YouTube Link](https://youtube.com/watch?v=0eO0pPrGi6o) 2019-05-18T20:02Z 16.9M followers, 1.9M engagements "International IP Law: Crash Course Intellectual Property #6 This week Stan Muller teaches you how intellectual property law functions internationally. Like between countries. Well guess what. There's kind of no such thing as international law. But we can talk about treaties. There is a bevy of international treaties that regulate how countries deal with each others' IP. The upside is that this cooperation tends to foster international trade. The downside is that these treaties tend to stifle creativity by making it harder to shorten copyright terms. You win some you lose some. Crash Course is" [YouTube Link](https://youtube.com/watch?v=0pgEPKAKrtQ) 2015-06-03T23:51Z 16.9M followers, 240K engagements "The Bobo Beatdown: Crash Course Psychology #12 In this episode of Crash Course Psychology Hank talks about how we learn by observation. and how that can mean beating up an inanimate clown named Bobo. Want more videos about psychology Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych -- Chapters: Introduction: The Bobo Doll Experiment 00:00 Social Cognitive Learning 1:05 Limitations of Classical & Operant Conditioning 1:58 Learning Associations 2:38 Learning & Cognition 4:06 Latent Learning 4:58 Observational Learning Modeling & Imitation 5:36 Reward Pathways &" [YouTube Link](https://youtube.com/watch?v=128Ts5r9NRE) 2014-04-28T22:16Z 16.9M followers, 3.3M engagements "The Native Civil Rights Movement: Ep [--] of Crash Course Native American History Were in our self-determination era In this episode of Crash Course Native American History well explore the activism that led to the biggest change in modern federal Indian policy and how it affects Native nations today. Introduction: Alcatraz 00:00 Indians of All Tribes 0:36 The Self-determination Era 1:56 Effects of Self-determination 3:58 The Indian Child Welfare Act 6:37 Problems with Self-determination 7:23 Self-determination Today 8:55 Review & Credits 9:49 Sources:" [YouTube Link](https://youtube.com/watch?v=1O2LWteKuRc) 2025-09-09T16:00Z 16.9M followers, 60.9K engagements "Horror in Latin American literature: Crash Course Latin American Literature #6 Are you afraid of ghosts In this episode of Crash Course Latin American Literature we pull back the curtain on the origins of Latin American horror winding our way through (literal) ghost towns haunted inns and the eerie landscape of the Andes. Prepare to be spooked. Introduction: A Ghost Story 00:00 Ghosts in Latin America 0:37 Pedro Pramo 1:22 The Female Gothic 4:54 Andean Gothic 6:51 The New Boom 8:25 Review and Credits 9:16 Sources:" [YouTube Link](https://youtube.com/watch?v=1TmWZ5yIKx0) 2025-12-11T17:00Z 16.9M followers, 24.1K engagements "Luther and the Protestant Reformation: Crash Course World History #218 In which John Green teaches you about the Protestant Reformation. Prior to the Protestant Reformation pretty much everyone in Europe was a Roman Catholic. Not to get all "great man" but Martin Luther changed all that. Martin Luther didn't like the corruption he saw in the church especially the sale of indulgences so he left the church and started his own. And it caught on And it really did kind of change the world. The changes increased literacy and education and some even say the Protestant Reformation was the beginning" [YouTube Link](https://youtube.com/watch?v=1o8oIELbNxE) 2014-11-29T21:02Z 16.9M followers, 6.2M engagements "Operating Systems: Crash Course Computer Science #18 Get 10% off a custom domain and email address by going tohttps://www.hover.com/CrashCourse. So as you may have noticed from last episode computers keep getting faster and faster and by the start of the 1950s they had gotten so fast that it often took longer to manually load programs via punch cards than to actually run them The solution was the operating system (or OS) which is just a program with special privileges that allows it to run and manage other programs. So today were going to trace the development of operating systems from the" [YouTube Link](https://youtube.com/watch?v=26QPDBe-NB8) 2017-06-28T21:13Z 16.9M followers, 1.8M engagements "Lost in Translation: Crash Course Film Criticism #7 It's time to take a look at a quieter sweeter and maybe happier film in this series. Sophia Coppola's "Lost in Translation" is a wonderful romantic comedy that doesn't play by the usual rules of its genre. In this episode Michael talks to us about how the film works as well as why the film works so well. Also does it critique Capitalism It might Strap in *** Check out all [--] films we'll be talking about below Citizen Kane Aliens Where Are My Children Selma In the Mood For Love Do the Right Thing Lost In Translation Apocalypse Now Pan's" [YouTube Link](https://youtube.com/watch?v=2wRcDM_5rjs) 2018-03-01T22:02Z 16.9M followers, 357.2K engagements "Election Basics: Crash Course Government and Politics #36 This week Craig is going to give you a broad overview of elections in the United States. So as you may have noticed there are kind of a lot of people in the U.S and holding individual issues up to a public vote doesn't seem particularly plausible. So to deal with this complexity we vote for people not policies that represent our best interests. But as you'll see this process was not thoroughly addressed in the Constitution so there have been a number of amendments and laws at the state level implemented to create the election system we" [YouTube Link](https://youtube.com/watch?v=48EZKXweGDo) 2015-10-23T21:32Z 16.9M followers, 1.3M engagements "Emmett Till: Crash Course Black American History #34 In [----] a 14-year-old boy named Emmett Till was brutally murdered in Money Mississippi. The white men who murdered him killed him for being Black. Emmett Till's mother chose to have an open casket funeral and show the world what had been done to her son. Despite the killers being acquitted in court the story of Emmett Till and the jarring images of his funeral shocked the nation and were a vital catalyst in turning the civil rights movement into a nationwide phenomenon. Clint's book How the Word is Passed is available now" [YouTube Link](https://youtube.com/watch?v=4HljsKwpv3g) 2022-03-12T17:28Z 16.9M followers, 351.7K engagements "Emotion Stress and Health: Crash Course Psychology #26 So it turns out we have an easy time reading emotions in facial expressions but emotions can straight up kill us In this episode of Crash Course Psychology Hank discusses stress emotions and their overall impact on our health. Want more videos about psychology Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych -- Chapters: Introduction: How Emotions Work 00:00 Facial Expressions 1:24 Expressing Emotions 2:18 How Many Emotions Are There 2:57 Two-Dimensional Model of Emotional Experience 3:29 Defining Stress" [YouTube Link](https://youtube.com/watch?v=4KbSRXP0wik) 2014-08-12T02:26Z 16.9M followers, 3.5M engagements "The Singularity Skynet and the Future of Computing: Crash Course Computer Science #40 In our SERIES FINALE of Crash Course Computer Science we take a look towards the future In the past [--] years electronic computing has fundamentally changed how we live our lives and we believe its just getting started. From ubiquitous computing artificial intelligence and self-driving cars to brain computer interfaces wearable computers and maybe even the singularity there is so much amazing potential on the horizon. Of course there is also room for peril with the rise of artificial intelligence and more" [YouTube Link](https://youtube.com/watch?v=5TNAz1HYg18) 2017-12-21T17:01Z 16.9M followers, 358.6K engagements "5 Human Impacts on the Environment: Crash Course Ecology #10 Hank gives the rundown on the top five ways humans are negatively impacting the environment and having detrimental effects on the valuable ecosystem services which a healthy biosphere provides. Table of Contents Ecosystem Services 00:51 The Importance of Biodiversity 04:07 Deforestation 06:42 Desertification 06:49 Global Warming 07:59 Invasive Species 08:51 Overharvesting 09:20 Crash Course/SciShow videos referenced in this episode: Hydrologic and Carbon Cycles: http://www.youtube.com/watchv=2D7hZpIYlCA Nitrogen and Phosphorus" [YouTube Link](https://youtube.com/watch?v=5eTCZ9L834s) 2013-01-08T01:14Z 16.9M followers, 2.8M engagements "How Presidents Govern: Crash Course Government and Politics #14 This week Craig Benzine talks about how the President gets things done. Filling the role of the Executive Branch is a pretty big job - much too big for just one person. It's so big that the President employs an entire federal bureaucracy Today were just going to focus on those closest to the President like the Vice President the Cabinet and the Executive Office of the President. Well figure out which strategy is most useful in helping the President make things happen and well discuss the controversy around the Presidents gradual" [YouTube Link](https://youtube.com/watch?v=5vnuFJSMYkY) 2015-05-01T23:49Z 16.9M followers, 1.2M engagements "How a Bill Becomes a Law: Crash Course Government and Politics #9 Oh my Craig has his work cut out for him this week. The process of how a bill becomes a law can be pretty complex fraught with potential bill-death at every corner. As if just getting through committee isnt difficult enough bills have to navigate a series of amendments and votes in both houses potentially more committees further compromise bills and even more floor votes just to end up on the chopping block of the President. And then in one fell swoop the President can stop a bill in its tracks with a veto But then again a" [YouTube Link](https://youtube.com/watch?v=66f4-NKEYz4) 2015-03-20T23:03Z 16.9M followers, 2.6M engagements "Translation: How RNA Gets Translated into Protein Power: Crash Course Biology #35 How does the information from mRNA turn into a protein It all comes down to translation where nucleotides are translated into a chain of amino acids. In this episode of Crash Course Biology well cover codon-reading ribosomes tRNA delivery trucks and scientists who are using what they know about translation to save lives. Introduction: Making Proteins 00:00 DNA & mRNA 1:13 How Translation Works 2:16 Peptides & Polypeptides 6:43 Why Proteins Matter 7:07 Dr. Katalin Karik 9:26 Review & Credits 11:37 This series was" [YouTube Link](https://youtube.com/watch?v=6ulXau2HyHg) 2024-03-19T16:00Z 16.9M followers, 285.2K engagements "What Are Rocks and How Do They Form Crash Course Geography #18 From towering mountains to pebbles along a river the Earth is made of a huge variety of rocks. In today's episode we're going to follow the rock cycle of a piece of granite in the Himalayan mountains and as you'll see every rock has a far-reaching story to tell often millions of years in the making. Watch our videos and review your learning with the Crash Course App Download here for Apple Devices: https://apple.co/3d4eyZo Download here for Android Devices: https://bit.ly/2SrDulJ Crash Course is on Patreon You can support us" [YouTube Link](https://youtube.com/watch?v=7Bxw4kkeHJ8) 2021-06-28T21:39Z 16.9M followers, 1.4M engagements "Crash Course Writing Workshop Editorial Director Meghan Modafferi and Script Editor Annie Fillenwarth take you behind the scenes into the life cycle of a Crash Course script as it develops from a seed of an idea into a heavily-researched edited fact-checked and fun-ified piece of writing. Learn how to make nonfiction writing engaging clear and story-oriented and avoid common pitfalls along the way. Learn more about the Learn-a-thon at http://complexlylearnathon.com" [YouTube Link](https://youtube.com/watch?v=7IaHRXC_U_U) 2025-11-03T08:19Z 16.9M followers, 17.1K engagements "The Land Back Movement Explained: Ep [--] of Crash Course Native American History The Land Back movement is exactly what it sounds like: Native Americans want their land back. But its also a whole lot more than that. In this episode of Crash Course Native American History we explore what the Land Back movement does how it works and what it means for our shared future on this planet. Introduction: [----] Land Back Lane 00:00 Land Back & Land Acknowledgements 0:40 Settler Rent 2:00 The Jemez Pueblo Tribe 3:17 Environmental Impact 4:14 Haudenosaunee Activism 7:04 Review & Credits 9:26 Sources:" [YouTube Link](https://youtube.com/watch?v=7L2cSifRrLk) 2025-11-11T17:00Z 16.9M followers, 53.1K engagements "Newtonian Gravity: Crash Course Physics #8 I'm sure you've all heard about Isaac Newton and that apple that fell on his head and how that was a huge deal to our understanding of gravity. Well. let's talk about that. In this episode of Crash Course Physics Shini sits down to talk about the realities of the apple story and how Newtonian Gravity is more than a little important. *** Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse -- Want to find Crash" [YouTube Link](https://youtube.com/watch?v=7gf6YpdvtE0) 2016-05-19T19:56Z 16.9M followers, 1.4M engagements "The Growth of Knowledge: Crash Course Psychology #18 How does our knowledge grow It turns out there are some different ideas about that. Schemas Four-Stage Theory of Cognitive Development and Vygotsky's Theory of Scaffolding all play different roles but the basic idea is that children think about things very differently than adults. Hank explains in today's episode of Crash Course Psychology. Want more videos about psychology Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych -- Chapters: Introduction: Cognitive Development 00:00 Maturation 1:23 Jean Piaget's" [YouTube Link](https://youtube.com/watch?v=8nz2dtv--ok) 2014-06-09T23:39Z 16.9M followers, 3.1M engagements "The Dred Scott Decision: Crash Course Black American History #16 In this video we'll learn about the US Supreme Court decision in Scott vs Sanford handed down in [----]. The case ultimately rejected the idea that Black people could be citizens of the United States and this helped entrench the institution of slavery denied a host of rights to a huge number of people (both enslaved and free) and increased the tensions between abolitionists and enslavers. Clint's book How the Word is Passed is available now https://bookshop.org/a/3859/9780316492935 VIDEO SOURCES" [YouTube Link](https://youtube.com/watch?v=9VffLWl8asY) 2021-09-04T16:59Z 16.9M followers, 566.3K engagements "Genetic Traits: Nature Nurture Not That Simple: Crash Course Biology #32 Its not nature versus nurtureits both In this episode of Crash Course Biology well explore how complex interactions between genes and the environment shape all sorts of traits from human skin color to honeybees royal jelly. Chapters: Nature vs. Nurture 00:00 Polygenic Traits 1:24 Complex Traits 3:31 Epigenetics & Dr. Folami Ideraabdullah 7:11 Heritability 9:14 Phenotypic Plasticity 10:10 Review & Credits 11:22 This series was produced in collaboration with HHMI BioInteractive committed to empowering educators and" [YouTube Link](https://youtube.com/watch?v=9zwq8N4Ufd8) 2024-02-27T17:00Z 16.9M followers, 130.2K engagements "The Internet: Crash Course Computer Science #29 Today we're going to talk about how the Internet works. Specifically how that stream of characters you punch into your browser's address bar like "youtube.com" return this very website. Just to clarify we're talking in a broader sense about that massive network of networks connecting millions of computers together not just the World Wide Web which is a portion of the Internet and our topic for next week. Today we're going to focus on how data is passed back and forth - how a domain name is registered by the Domain Name System and of course how" [YouTube Link](https://youtube.com/watch?v=AEaKrq3SpW8) 2017-09-20T21:47Z 16.9M followers, 900.5K engagements "Water & Solutions - for Dirty Laundry: Crash Course Chemistry #7 Dihydrogen monoxide (better known as water) is the key to nearly everything. It falls from the sky makes up 60% of our bodies and just about every chemical process related to life takes place with it or in it. Without it none of the chemical reactions that keep us alive would happen - none of the reactions that sustain any life form on earth would happen - and the majority of inorganic chemical reactions that shape the surface of the earth would not happen either. Every one of us uses water for all kinds of chemistry every day -" [YouTube Link](https://youtube.com/watch?v=AN4KifV12DA) 2013-03-26T02:51Z 16.9M followers, 2.3M engagements "Moon Phases: Crash Course Astronomy #4 In this episode of Crash Course Astronomy Phil takes you through the cause and name of the Moon's phases. Check out the Crash Course Astronomy solar system poster here: http://store.dftba.com/products/crashcourse-astronomy-poster -- Chapters: Why does the Moon Have Phases 00:00 New Moon 2:26 Waxing Crescent 4:17 First Quarter 4:35 Waxing Gibbous 5:15 Full Moon 5:32 Waning Gibbous Third Quarter and Waning Crescent 6:26 Earthshine 7:20 Review 8:58 -- PBS Digital Studios: http://youtube.com/pbsdigitalstudios Follow Phil on Twitter:" [YouTube Link](https://youtube.com/watch?v=AQ5vty8f9Xc) 2015-02-05T22:00Z 16.9M followers, 4.1M engagements "Shirley Chisholm: Crash Course Black American History #43 In [----] Shirley Chisholm ran for president of the United States of America as a Democrat. She didn't win but this was not the beginning or the end of her career in politics. She held a congressional seat in the New York delegation for decades and Shirley was a pioneer on many fronts. Today we'll learn about her life her career and her legacy. Clint's book How the Word is Passed is available now https://bookshop.org/books/how-the-word-is-passed-a-reckoning-with-the-history-of-slavery-across-america/9780316492935 SOURCES Shirley Chisholm" [YouTube Link](https://youtube.com/watch?v=ATfkyVN7M5c) 2022-07-27T21:56Z 16.9M followers, 118.4K engagements "Economic Systems and Macroeconomics: Crash Course Economics #3 In which Jacob Clifford and Adriene Hill teach you about Economic Systems and Macroeconomics. So economics is basically about choices. We'll look at some of the broadest economic choices when we talk about the difference between planned economies and market economies. We'll get into communism socialism command economies and capitalism. We'll look at how countries choose the kind of system they're going to use (spoiler alert: many end up with mixed economies). We'll also look into how individuals make economic choices. Crash Course" [YouTube Link](https://youtube.com/watch?v=B43YEW2FvDs) 2015-07-30T18:40Z 16.9M followers, 4.4M engagements "E/Z Alkenes Electrophilic Addition & Carbocations: Crash Course Organic Chemistry #14 Alkenes are an important type of molecule in organic chemistry that were going to see a lot more of in this series. But before we can really get into the many cool reactions alkenes do we need to go over some of the basics. In this episode of Crash Course Organic Chemistry well review and build on our knowledge of alkene nomenclature revisit our friend the carbocation and learn Markovnikovs Rule: an important tool that will help us predict the products of addition reactions involving alkenes. Series Sources:" [YouTube Link](https://youtube.com/watch?v=B8qaENT_k0A) 2020-10-14T18:00Z 16.9M followers, 220.7K engagements "Distances: Crash Course Astronomy #25 How do astronomers make sense of the vastness of space How do they study things so far away Today Phil talks about distances going back to early astronomy. Ancient Greeks were able to find the size of the Earth and from that the distance to and the sizes of the Moon and Sun. Once the Earth/Sun distance was found parallax was used to find the distance to nearby stars and that was bootstrapped using brightness to determine the distances to much farther stars. Check out the Crash Course Astronomy solar system poster here:" [YouTube Link](https://youtube.com/watch?v=CWMh61yutjU) 2015-07-17T00:00Z 16.9M followers, 2.1M engagements "Degrees of Freedom and Effect Sizes: Crash Course Statistics #28 Today we're going to talk about degrees of freedom - which are the number of independent pieces of information that make up our models. More degrees of freedom typically mean more concrete results. But something that is statistically significant isn't always practically significant. And to measure that we'll introduce another new concept - effect size. Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following Patrons for their generous monthly contributions" [YouTube Link](https://youtube.com/watch?v=Cm0vFoGVMB8) 2018-08-22T20:47Z 16.9M followers, 212K engagements "The Norse Pantheon: Crash Course World Mythology #10 This week we're headed north. To check out the gods of the Northmen. Or the Norse. That's right we're talking Thor Loki Freyr Freya Odin Frigg Baldr and Tyr. And Fenrir. And the Frost Giants. There's a lot to cover here and it's going to be fun. Watch this prior to Ragnarok as this video probably won't be available after the end of the universe. Crash Course is made with Adobe Creative Cloud. Try it for free here: http://www.adobe.com/creativecloud/start-with-free-creativecloud.html Our Sources: Kevin Crossley-Holland the Norse Myths." [YouTube Link](https://youtube.com/watch?v=CyU54gV_PWM) 2017-04-30T22:18Z 16.9M followers, 1.6M engagements "A History of Indigenous Women with Lily Gladstone: Ep [--] of Crash Course Native American History Women have always played important roles in Native societies. In this episode of Crash Course Native American History Lily Gladstone helps us unpack the ways Native women have shown up as war heroes and peacemakers and as matriarchs and activists. Introduction: Divine Women 00:00 Matriarchal Societies 0:37 Native Women at War 2:01 Jikonsaseh 3:05 Ideas about Gender 4:48 Effects of Colonization 5:53 Violence Against Women Today 8:08 Native Activism 9:24 Review & Credits 12:42 Special thanks to "100" [YouTube Link](https://youtube.com/watch?v=Dj8EjBQJD84) 2025-10-14T16:00Z 16.9M followers, 117.3K engagements "Money and Finance: Crash Course Economics #11 So we've been putting off a kind of basic question here. What is money What is currency How are the two different. Well not to give away too much but money has a few basic functions. It acts as a store of value a medium of exchange and as a unit of account. Money isn't just bills and coins. It can be anything that meets these three criteria. In US prisons apparently pouches of Mackerel are currency. Yes mackerel the fish. Paper and coins work as money because they're backed by the government which is an advantage over mackerel. So once you've got" [YouTube Link](https://youtube.com/watch?v=Dugn51K_6WA) 2015-10-14T16:01Z 16.9M followers, 1.9M engagements "The Northern Renaissance: Crash Course European History #3 The European Renaissance may have started in Florence but it pretty quickly moved out of Italy and spread the art architecture literature and humanism across Europe to places like France Spain England and the Low Countries. SOURCES: Hunt Lynn et al. The Making of the West: Peoples and Cultures 6th ed. Boston: Bedford St. Martins [----]. Jardine Lisa. Erasmus Man of Letters. Princeton: Princeton University Press [----]. Donald R. Kelley Renaissance Humanism. Boston: Twayne [----]. Crash Course is on Patreon You can support us directly by" [YouTube Link](https://youtube.com/watch?v=EuzAbE-kPkM) 2019-04-26T23:53Z 16.9M followers, 1.5M engagements "Cyclohexanes: Crash Course Organic Chemistry #7 Hexagons appear all over the natural world from honeycomb to bubbles and they even appear in organic chemistry In this episode of Crash Course Organic Chemistry we're learning all about cyclohexanes including how rings pucker to relieve strain the boat and chair conformations and how ring flips can switch substituents from axial to equatorial. We'll practice a lot of chair flips but don't flip an actual chair just yet Lots of practice is key to understanding organic chemistry's favorite manifestation of the hexagon. Episode Sources: Philip Ball" [YouTube Link](https://youtube.com/watch?v=GRVxDqhgOYo) 2020-07-08T21:00Z 16.9M followers, 240.6K engagements "Social Mobility: Crash Course Sociology #26 Today were exploring social mobility in some more depth. Well look at intergenerational and intragenerational mobility and the difference between absolute and relative mobility. Well go over the long run upward social mobility trends in the United States as well as recent declines in absolute social mobility. Well also explore how opportunities for social mobility differ by class race and gender. Crash Course is made with Adobe Creative Cloud. Get a free trial here: https://www.adobe.com/creativecloud.html Crash Course is on Patreon You can support" [YouTube Link](https://youtube.com/watch?v=GjuV-XdYHhA) 2017-09-25T20:01Z 16.9M followers, 412.4K engagements "Check Yourself with Lateral Reading: Crash Course Navigating Digital Information #3 Look to your left. Look to your right. Look at this video. Today John Green is going to teach you how to read laterally using multiple tabs in your browser to look stuff up and fact check as you read. Real-time fact-checking an help you figure out what's real and what's not on the internet. Special thanks to our partners from MediaWise who helped create this series: The Poynter Institute The Stanford History Education Group (sheg.stanford.edu) Follow MediaWise and their fact-checking work across social:" [YouTube Link](https://youtube.com/watch?v=GoQG6Tin-1E) 2019-01-23T00:08Z 16.9M followers, 1M engagements "P-Hacking: Crash Course Statistics #30 Today we're going to talk about p-hacking (also called data dredging or data fishing). P-hacking is when data is analyzed to find patterns that produce statistically significant results even if there really isn't an underlying effect and it has become a huge problem in science since many scientific theories rely on p-values as proof of their existence Today we're going to talk about a few ways researchers have "hacked" their data and give you some tips for identifying and avoiding these types of problems when you encounter stats in your own lives. XKCD's" [YouTube Link](https://youtube.com/watch?v=Gx0fAjNHb1M) 2018-09-05T21:03Z 16.9M followers, 160.1K engagements "Community Ecology: Feel the Love - Crash Course Ecology #4 Interactions between species are what define ecological communities and community ecology studies these interactions anywhere they take place. Although interspecies interactions are mostly competitive competition is pretty dangerous so a lot of interactions are actually about side-stepping direct competition and instead finding ways to divvy up resources to let species get along. Feel the love Table of Contents 1) Competitive Exclusion Principle 2:02 2) Fundamental vs. Realized Niche 3:48 3) Eco-lography / Resource Partitioning 5:25" [YouTube Link](https://youtube.com/watch?v=GxE1SSqbSn4) 2012-11-26T22:33Z 16.9M followers, 1.2M engagements "World War II A War for Resources: Crash Course World History #220 In which John Green teaches you about World War II and some of the causes behind the war. In a lot of ways WWII was about resources especially food. The expansionist aggression of both Germany and Japan was in a lot of ways about resources. There were other reasons to be sure but the idea that the Axis needed more food can't be ignored. Citation 1: Lizzie Collingham. The Taste of War: World War II and the Battle for Food. Penguin. New York. [----]. p [--] Citation 2: Collingham. p [---] --- Learn more about WWII in these other Crash" [YouTube Link](https://youtube.com/watch?v=H-2q-QMUIgY) 2014-12-14T23:34Z 16.9M followers, 2.9M engagements "A Brief History of the Universe: Crash Course Astronomy #44 Thanks to the wonders of physics astronomers can map a timeline of the universes history. Today Phils going to give you an overview of those first few minutes (yes MINUTES) of the universes life. It started with the Big Bang when the Universe was incredibly dense and hot. It expanded and cooled going through multiple stages where different kinds of matter could form. It underwent a phenomenally rapid expansion called inflation which smoothed out much of the lumpiness in the matter. Normal matter formed atoms between [--] and [--] minutes" [YouTube Link](https://youtube.com/watch?v=IGCVTSQw7WU) 2016-01-07T22:00Z 16.9M followers, 1.2M engagements "World War I Battlefields: Crash Course European History #33 Europe's system of alliances and centuries-old tensions erupted into war in August of [----]. This week on Crash Course Euro we're talking about the military history of World War I and taking a look at the broad strokes of how the war unfolded. We'll take you from the guns of August through gruesome battles like Verdun and the Somme and follow the thread all the way through to the Armistice in [----]. It didn't turn out to be the War to End All Wars sadly but there is a lot to learn from it. Sources -Engelstein Laura. Russia in Flames." [YouTube Link](https://youtube.com/watch?v=IIiDULrXaqQ) 2020-01-23T21:22Z 16.9M followers, 880.5K engagements "African Pantheons and the Orishas: Crash Course World Mythology #11 So today were talking about African Pantheons. Now you might say thats ridiculous. Africa isnt a single place with a single pantheon and wed be fools to try and cover all that in an eleven minute video. Youd be right. Instead were going to focus on Yoruba religion from west Africa and the Orishas that populate Yoruba stories. The many many Orishas cover all aspects of life and can be pretty specialized. Were going to focus on a dozen or so. Crash Course is on Patreon You can support us directly by signing up at" [YouTube Link](https://youtube.com/watch?v=J2se_zimj40) 2017-05-12T23:34Z 16.9M followers, 1.4M engagements "Confucianism Buddhism and Daoism: Chinese Popular Religion A large proportion of Chinese people believe in a godyet most report they dont belong to any religion. In this episode of Crash Course Religions well learn about two of the Three Teachings of ChinaConfucianism and Daoismand explore why Chinese religious practice is much more fluid than the question What religion do you follow Introduction: A Ghostly Unboxing 00:00 The Ghost Festival 1:29 Religion in China 2:43 Confucianism 4:02 Daoism 7:39 Chinese Popular Religion 10:47 Review & Credits 11:44" [YouTube Link](https://youtube.com/watch?v=JJ7fTJb6RHc) 2024-11-26T17:00Z 16.9M followers, 258.2K engagements "German Expressionism: Crash Course Film History #7 We've spent a lot of time focusing on France and the U.S. as that's where a significant amount of both infrastructure and business models were initially set up for film. But there were other countries adding their own stories to the annals of film history. In this episode of Crash Course Film History we're going to focus on Germany and how they got a bit expressive with film. Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios Want to know more about Craig https://www.youtube.com/user/wheezywaiter The" [YouTube Link](https://youtube.com/watch?v=K6XDyth0qxc) 2017-05-26T00:00Z 16.9M followers, 569.1K engagements "What Are Ecosystems Crash Course Geography #15 Today we're going to take a closer look at ecosystems -- which are communities of living organisms in an area interacting with their environment -- and how this relationship between the amount of energy a place receives and the movement of nutrients is what makes the incredible diversity of life possible. We'll also take a look at the patterns we see in the main global biomes show you why some biomes (like tropical rainforests) are so productive and discuss an agricultural practice some farmers have employed to help preserve their local" [YouTube Link](https://youtube.com/watch?v=KQF9WdZrH_c) 2021-05-18T19:11Z 16.9M followers, 478K engagements "Italian and German Unification: Crash Course European History #27 So we haven't talked much about Italy and Germany so far in Crash Course Euro and that's because prior to the mid-19th century those two nation-states weren't really a thing. Today we'll look at how Italy and Germany pulled it together in the second half of the 1800s. You'll learn about Guisseppe Garibaldi Victor Emmanuelle Otto von Bismarck Wilhelm I and a whole heck of a lot about the development of modern politics. Sources -Hunt Lynn. The Making of the West: Peoples and Cultures. 6th ed. Boston: Bedford St. Martins 2019." [YouTube Link](https://youtube.com/watch?v=KSjDe9_jZk8) 2019-11-27T00:21Z 16.9M followers, 1.5M engagements "Nuclear Chemistry: Crash Course Chemistry #38 In this episode Hank welcomes you to the new age to the new age welcome to the new age. Here he'll talk about transmutation among elements isotopes calculating half-life radioactive decay and spontaneous fission. Pssst. we made flashcards to help you review the content in this episode Find them on the free Crash Course App Download it here for Apple Devices: https://apple.co/3d4eyZo Download it here for Android Devices: https://bit.ly/2SrDulJ -- Table of Contents Radioactivity Transmutation Among Elements and Isotopes Calculating Half-Life" [YouTube Link](https://youtube.com/watch?v=KWAsz59F8gA) 2013-11-11T18:29Z 16.9M followers, 2.2M engagements "Tides: Crash Course Astronomy #8 Today Phil explores the world of tides What is the relationship between tides and gravity How do planets and their moons become tidally locked What would happen if you were 300km tall Important questions. Check out the Crash Course Astronomy solar system poster here: http://store.dftba.com/products/crashcourse-astronomy-poster -- Chapters: Introduction 00:00 Gravity Over Distance 0:44 Tidal Force Parameters 1:35 Battle of the Bulges 2:55 High and Low Tides 3:47 Push & Pull 4:51 Tidal Lock 6:07 Sun Tides 6:58 Review 8:51 -- PBS Digital Studios:" [YouTube Link](https://youtube.com/watch?v=KlWpFLfLFBI) 2015-03-05T22:00Z 16.9M followers, 2M engagements "The Structure & Cost of US Health Care: Crash Course Sociology #44 In our final episode of Crash Course Sociology we are going to talk about what the health care system in the US looks like the five As of health care accessibility and a couple of contributing factors to the affordability of health care: fee for service care and the structure of our health insurance system which encourage higher spending. Thanks everybody for joining us for the past year on Crash Course Sociology Crash Course is made with Adobe Creative Cloud. Get a free trial here:" [YouTube Link](https://youtube.com/watch?v=KriEIJ0ubh0) 2018-02-12T22:03Z 16.9M followers, 352.3K engagements "Mitosis: Splitting Up is Complicated - Crash Course Biology #12 Hank describes mitosis and cytokinesis - the series of processes our cells go through to divide into two identical copies. References: http://www.eurekalert.org/pub_releases/2012-02/wifb-amm020812.php http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files/bio%20101/bio%20101%20lectures/mitosis/mitosis.htm http://www.genome.gov/Images/press_photos/highres/97-300.jpg http://www.nature.com/nrm/journal/v2/n1/fig_tab/nrm0101_072a_F1.html https://www.genome.gov/Glossary/index.cfmp=viewimage&id=33" [YouTube Link](https://youtube.com/watch?v=L0k-enzoeOM) 2012-04-16T21:22Z 16.9M followers, 7.2M engagements "How to Pay for College Crash Course How to College You're already learning on YouTube why not get college credit for it https://link.gostudyhall.com/my1 Paying for college is stressful and there's a lot of research we need to do. So we want to be methodical and patient and make sure we know what all of our options are. So in this episode Erica walks us through how to know our options what steps to take to get the funding you need to be successful in college. *** Now you can take top-tier college courses with Study Hall Study Hall videos are available to watch at no cost and first-year courses" [YouTube Link](https://youtube.com/watch?v=L6cjyTaExCQ) 2022-04-22T19:00Z 16.9M followers, 304.9K engagements "Migration: Crash Course European History #29 Between [----] and [----] an estimated [--] million people left Europe. This is one of the most significant migrations in human history. So who was leaving Europe And why Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following patrons for their generous monthly contributions that help keep Crash Course free for everyone forever: Eric Prestemon Sam Buck Mark Brouwer Efrain R. Pedroza Matthew Curls Indika Siriwardena Avi Yashchin Timothy J Kwist Brian Thomas Gossett Haixiang N/A Liu" [YouTube Link](https://youtube.com/watch?v=MN8fjAjLLpg) 2019-12-10T22:57Z 16.9M followers, 586.9K engagements "School Segregation and Brown v Board: Crash Course Black American History #33 In [----] the Supreme Court ruled unanimously that public schools should be racially integrated and overturned the separate but equal doctrine established in Plessy v Ferguson decades before. This was made possible by a concerted legal effort spearheaded by the NAACP. Beginning in the 1930s the NAACP's legal defense fund (led by Thurgood Marshall at the time of the Brown Decision) pursued a strategy of bringing cases to court that would expand the civil rights of Black Americans. This multi-decade effort culminated in" [YouTube Link](https://youtube.com/watch?v=NBlqcAEv4nk) 2022-02-11T21:27Z 16.9M followers, 478.5K engagements "Metals & Ceramics: Crash Course Engineering #19 Today well explore more about two of the three main types of materials that we use as engineers: metals and ceramics. Well discuss properties of metals alloys ceramics clay cement and glass-ceramic materials. Well also look at the applications of our materials with microelectromechanical systems and accelerometers. Correction: aluminum oxide is not rust; rust refers only to iron oxide. Aluminum does corrode and the process by which it corrodes has been referred to as 'rusting' even if it is technically not rusting unless the material is iron or" [YouTube Link](https://youtube.com/watch?v=NOK1nMiiTWU) 2018-09-27T19:01Z 16.9M followers, 275.1K engagements "Animal Defense Systems: How Skin Snot and Cells Keep Us Healthy: Crash Course Biology #45 The world is full of microbes and viruses that can get us sick but weve got an Avengers-style defense system ready to take them on. In this episode of Crash Course Biology well learn about an animals immune system from their skin to inflammatory responses to the adaptive immune system and all the special cells and antibodies that come with it. Introduction: Defending Against Pathogens 00:00 The Integumentary System 01:09 Internal Defenses 02:29 Asymptomatic Infections 05:52 Healing 06:31 Adaptive" [YouTube Link](https://youtube.com/watch?v=Nb6oWRnvBDw) 2024-06-04T16:00Z 16.9M followers, 48.5K engagements "Columbus Vasco da Gama and Zheng He - 15th Century Mariners: Crash Course World History #21 In which John Green teaches you about the beginning of the so-called Age of Discovery. You've probably heard of Christopher Columbus who "discovered" America in [----] but what about Vasco da Gama How about Zheng He Columbus gets a bad rap from many modern historians but it turns out he was pretty important as far as the history of the world goes. That said he wasn't the only pioneer plying the seas in the 1400s. In Portugal Vasco da Gama was busy integrating Europe into the Indian Ocean Trade by sailing" [YouTube Link](https://youtube.com/watch?v=NjEGncridoQ) 2012-06-15T01:37Z 16.9M followers, 4.4M engagements "Moonlight: Crash Course Film Criticism #13 Moonlight is a hard-edged yet beautifully made story about a black American dealing with his sexuality in a sometimes unforgiving and violent world. Its director Barry Jenkins uses every trick in the filmmaking book to put us in the perspective of the main character Chiron. It's an amazing accomplishment as Michael Aranda talks about in this episode of Crash Course Film Criticism. *** Check out all [--] films we'll be talking about below Citizen Kane Aliens Where Are My Children Selma In the Mood For Love Do the Right Thing Lost In Translation" [YouTube Link](https://youtube.com/watch?v=Nlz9CCZSJ5I) 2018-04-12T20:55Z 16.9M followers, 350K engagements "The Rise of Conservatism: Crash Course US History #41 In which John Green teaches you about the rise of the conservative movement in United States politics. So the sixties are often remembered for the liberal changes that the decade brought to America but lest you forget Richard Nixon was elected to the presidency during the sixties. The conservative movement didn't start with Nixon though. Modern conservatism really entered mainstream consciousness during the [----] presidential contest between the incumbent president and Kennedy torch-bearer Lyndon B Johnson and Republican Senator Barry" [YouTube Link](https://youtube.com/watch?v=OCrxD19DHA8) 2013-12-13T23:48Z 16.9M followers, 3.9M engagements "Compression: Crash Course Computer Science #21 Get your first two months of CuriosityStream free by going to http://curiositystream.com/crashcourse and using the promo code crashcourse. So last episode we talked about some basic file formats but what we didnt talk about is compression. Often files are way too large to be easily stored on hard drives or transferred over the Internet - the solution unsurprisingly is to make them smaller. Today were going to talk about lossless compression which will give you the exact same thing when reassembled as well as lossy compression which uses the" [YouTube Link](https://youtube.com/watch?v=OtDxDvCpPL4) 2017-07-26T21:25Z 16.9M followers, 596.4K engagements "Foreign Policy: Crash Course Government and Politics #50 Today Craig finishes up our series on U.S. Government and Politics by talking about both the least and most important aspect of government: foreign policy. Foreign policy is important because it has the potential to affect the largest number of people but at the same time it tends to play a minimal role in our perception of the government (unless were at war). Foreign policy addresses diplomacy security human rights economics and the environment at a global scale and were going to talk about how our government has approached each of" [YouTube Link](https://youtube.com/watch?v=PMhIQNkO_Y0) 2016-03-05T01:46Z 16.9M followers, 1M engagements "Eclipses: Crash Course Astronomy #5 The big question in the comments last week was "BUT WHAT ABOUT ECLIPSES" Today Phil breaks 'em down for you. This episode is sponsored by Squarespace: http://www.squarespace.com/crashcourse Check out the Crash Course Astronomy solar system poster here: http://store.dftba.com/products/crashcourse-astronomy-poster -- As promised Phil's sun spotting recommendations: Astronomers Without Borders (charitable org): http://store.astronomerswithoutborders.org/index.phpmain_page=product_info&cPath=8&products_id=3 Rainbow Symphony glasses:" [YouTube Link](https://youtube.com/watch?v=PRgua7xceDA) 2015-02-13T16:00Z 16.9M followers, 2.1M engagements "Polar & Non-Polar Molecules: Crash Course Chemistry #23 Molecules come in infinite varieties so in order to help the complicated chemical world make a little more sense we classify and categorize them. One of the most important of those classifications is whether a molecule is polar or non-polar which describes a kind of symmetry - not just of the molecule but of the charge. In this edition of Crash Course Chemistry Hank comes out for Team Polar and describes why these molecules are so interesting to him. You'll learn that molecules need to have both charge asymmetry and geometric asymmetry" [YouTube Link](https://youtube.com/watch?v=PVL24HAesnc) 2013-07-23T02:59Z 16.9M followers, 4.6M engagements "Adolescence: Crash Course Psychology #20 In this episode of Crash Course Psychology Hank has a look at that oh-so-troublesome time in everyone's life: Adolescence He talks about identity individuality and The Breakfast Club. Want more videos about psychology Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych -- Chapters: Introduction: The Breakfast Club 00:00 Erikson's [--] Stages of Progressive Psychosocial Development 2:05 Adolescence: Identity vs. Role Confusion 2:51 Young Adulthood: Intimacy vs. Isolation 3:39 Middle Adulthood: Generativity vs. Stagnation 4:35" [YouTube Link](https://youtube.com/watch?v=PzyXGUCngoU) 2014-06-23T16:00Z 16.9M followers, 3.1M engagements "Peripheral Nervous System: Crash Course Anatomy & Physiology #12 It is now time to meet the system that helps your brain stay in touch with the outside world. We follow up last week's tour of the central nervous system with a look at your peripheral nervous system its afferent and efferent divisions how it processes information the reflex arc and what your brain has to say about pain. Pssst. we made flashcards to help you review the content in this episode Find them on the free Crash Course App Download it here for Apple Devices: https://apple.co/3d4eyZo Download it here for Android Devices:" [YouTube Link](https://youtube.com/watch?v=QY9NTVh-Awo) 2015-03-30T21:00Z 16.9M followers, 3.4M engagements "Test Statistics: Crash Course Statistics #26 Test statistics allow us to quantify how close things are to our expectations or theories. Instead of going on our gut feelings they allow us to add a little mathematical rigor when asking the question: Is this random or real Today well introduce some examples using both t-tests and z-tests and explain how critical values and p-values are different ways of telling us the same information. Well get to some other test statistics like F tests and chi-square in a future episode. Crash Course is on Patreon You can support us directly by signing up at" [YouTube Link](https://youtube.com/watch?v=QZ7kgmhdIwA) 2018-08-08T21:43Z 16.9M followers, 284.5K engagements "Growth Cities and Immigration: Crash Course US History #25 In which John Green teaches you about the massive immigration to the United States during the late 19th and early 20th centuries. Immigrants flocked to the US from all over the world in this time period. Millions of Europeans moved to the US where they drove the growth of cities and manned the rapid industrialization that was taking place. In the western US many many Chinese immigrants arrived to work on the railroad and in mines. As is often the case in the United States the people who already lived in the US reacted kind of badly to" [YouTube Link](https://youtube.com/watch?v=RRhjqqe750A) 2013-08-15T22:06Z 16.9M followers, 3.8M engagements "Cultures Subcultures and Countercultures: Crash Course Sociology #11 What is culture How do we define it and how does it change Well explore different categories of culture like low culture high culture and sub-cultures. We'll also revisit our founding theories to consider both a structural functionalist and a conflict theory perspective on what cultures mean for society. Crash Course is made with Adobe Creative Cloud. Get a free trial here: https://www.adobe.com/creativecloud.html *** Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse" [YouTube Link](https://youtube.com/watch?v=RV50AV7-Iwc) 2017-05-22T20:00Z 16.9M followers, 1.7M engagements "What Is a Good Life: Crash Course Philosophy #46 In our final episode of Crash Course Philosophy we consider what it means to live a good life. Well look at the myth of Sisyphus Robert Nozicks experience machine Aristotles eudaimonistic picture of a good human life and the existentialists view that we each determine the value of our own lives. And well think about how you too can live the life of a philosopher. -- Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios -- Want to find Crash Course elsewhere on the internet Facebook -" [YouTube Link](https://youtube.com/watch?v=Ra1Dmz-5HjU) 2017-02-13T22:30Z 16.9M followers, 1.4M engagements "Patents Novelty and Trolls: Crash Course Intellectual Property #4 This week Stan teaches you about patents. It turns out they're patently complicated So patents have some similarities to copyright in that they grant a limited monopoly to people who invent things. The key difference between patents and copyright is that patents are for THINGS. Copyright is for an idea. So if you've come up with a great new invention like for example a condiment gun you should get a patent. We'll also talk about some of the limitations and problems of patents including patent trolls Thanks to the following" [YouTube Link](https://youtube.com/watch?v=RrN7IxvAJto) 2015-05-14T16:08Z 16.9M followers, 453.4K engagements "LARP: Crash Course Games #26 Today were going to talk about LARPs or live action role-playing games. Larping tends to conjure up the image of a bunch of nerds hitting each other with foam weapons but its much more than that. LARPs merge performance community and art in a way that allows players to experience different lives within the safe confines of a game. And it isnt all just medieval battles either there are LARPs for just about any kind of game scenario you could imagine and even some that you might not - like those designed to help players better understand the real-world struggles of" [YouTube Link](https://youtube.com/watch?v=SUYb29YV47w) 2016-11-12T00:18Z 16.9M followers, 154K engagements "How Your Biology Affects Your Health: Crash Course Public Health #2 Today we are going to begin our discussion on the determinants of health which are all of the conditions we are born live and work in that have an influence on our overall wellbeing. Now these determinants can span everything from your education level to income level to genetic code so today we're just going to focus on the biological factors like our age genes and sex and take a closer look at their impacts. Check out our shared playlist with APHA: https://www.youtube.com/playlistlist=PLDjqc55aK3kywF2dd97_Jh5iP0d2ARhdo" [YouTube Link](https://youtube.com/watch?v=SzsifG0UvTM) 2022-08-11T17:00Z 16.9M followers, 118.2K engagements "Introduction to the Solar System: Crash Course Astronomy #9 In today's Crash Course Astronomy Phil takes a look at the explosive history of our cosmic backyard. We explore how we went from a giant ball of gas to the system of planets and other celestial objects we have today. This episode is sponsored by Squarespace: http://www.squarespace.com/crashcourse Check out the Crash Course Astronomy solar system poster here: http://store.dftba.com/products/crashcourse-astronomy-poster -- Chapters: Introduction 00:00 Geocentrism vs Heliocentrism 0:51 Makeup of the Solar System 2:38 Is Pluto a Planet" [YouTube Link](https://youtube.com/watch?v=TKM0P3XlMNA) 2015-03-12T23:00Z 16.9M followers, 2.3M engagements "The Gravity of the Situation: Crash Course Astronomy #7 In today's episode Phil looks at how gravity plays out across the universe. This episode is sponsored by Squarespace: http://www.squarespace.com/crashcourse Check out the Crash Course Astronomy solar system poster here: http://store.dftba.com/products/crashcourse-astronomy-poster -- Chapters: Introduction 00:00 Understanding Mass 1:11 What is Gravity 2:17 Different Types of Orbit 3:41 Escape Velocity 5:30 Why Are Astronauts Weightless 7:03 Gravity Warps Space 8:17 Review 8:43 -- PBS Digital Studios: http://youtube.com/pbsdigitalstudios" [YouTube Link](https://youtube.com/watch?v=TRAbZxQHlVw) 2015-02-26T22:00Z 16.9M followers, 1.7M engagements "The Natives and the English - Crash Course US History #3 In which John Green teaches you about relations between the early English colonists and the Native people they encountered in the New World. In short these relations were poor. As soon as they arrived the English were in conflict with the native people. At Jamestown Captain John Smith briefly managed to get the colony on pretty solid footing with the local tribes but it didn't last and a long series of wars with the natives ensued. This pattern would continue in US history with settlers pushing into native lands and pushing the" [YouTube Link](https://youtube.com/watch?v=TTYOQ05oDOI) 2013-02-14T23:13Z 16.9M followers, 5M engagements "Social Influence: Crash Course Psychology #38 Why do people sometimes do bad things just because someone else told them to And what does the term Groupthink meanIn today's episode of Crash Course Psychology Hank talks about the ideas of Social Influence and how it can affect our decisions to act or to not act. Want more videos about psychology Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych -- Chapters: Introduction 00:00 Milgram's Obedience Experiment 0:31 Social Influence & Conformity 3:22 Asch's Conformity Experiment 4:08 Cultural Expectations & Normative" [YouTube Link](https://youtube.com/watch?v=UGxGDdQnC1Y) 2014-11-12T00:46Z 16.9M followers, 3.1M engagements "The Language of Film: Crash Course Film History #5 In this episode of Crash Course Film History we talk about the development of the language of films by filmmakers like Edwin S. Porter and his films; Life of an American Fireman and The Great Train Robbery. Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios Want to know more about Craig https://www.youtube.com/user/wheezywaiter The Latest from PBS Digital Studios: https://www.youtube.com/playlistlist=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV *** Images and Video Used are in the Public Domain and from the Library" [YouTube Link](https://youtube.com/watch?v=V7ZHd1xU2w8) 2017-05-11T21:45Z 16.9M followers, 422.6K engagements "Influence & Persuasion: Crash Course Media Literacy #6 Weve mentioned already that theres a lot of money in media and a huge chunk of that money is spent on trying to get you to do something buy something vote a certain way change a behavior. How does advertising work And whats the difference between advertising public relations and propaganda Were going to talk about all that and more today. *** Resources: How To Use [--] Psychological Theories To Persuade People https://www.fastcompany.com/3030173/how-to-use-10-psychological-theories-to-persuade-people The [--] Principles of Persuasion" [YouTube Link](https://youtube.com/watch?v=VXhLmkrN0-I) 2018-04-03T19:56Z 16.9M followers, 421.1K engagements "The Nervous System Part [--] - Synapses: Crash Course Anatomy & Physiology #10 We continue our tour of the nervous system by looking at synapses and the crazy stuff cocaine does to your brain. Pssst. we made flashcards to help you review the content in this episode Find them on the free Crash Course App Download it here for Apple Devices: https://apple.co/3d4eyZo Download it here for Android Devices: https://bit.ly/2SrDulJ Chapters: Introduction: What are Synapses 00:00 Electrical vs Chemical Synapses 1:58 How Electrical Synapses Work: Gap Junctions 2:56 How Chemical Synapses Work:" [YouTube Link](https://youtube.com/watch?v=VitFvNvRIIY) 2015-03-10T17:30Z 16.9M followers, 5.3M engagements "The Future of Public Health: Crash Course Public Health #10 We dont know what the next big scientific breakthrough is going to be or what futuristic diseases well encounter. But when it comes to our health we actually have a pretty good idea of what could be next. And we also have some ideas about what we need to do today to prepare. In this final episode of Crash Course Public Health were going to take a look into the future with some roadmaps from the present. Chapters: Looking to the Future 00:00 Disease Surveillance 2:55 A Planetary Approach 5:05 Technology & Misinformation 8:12 Health" [YouTube Link](https://youtube.com/watch?v=VvRr0oL6s_E) 2022-10-06T17:00Z 16.9M followers, 108.6K engagements "Great Glands - Your Endocrine System: CrashCourse Biology #33 Hank fills us in on the endocrine system - the system of glands that produce and secrete different types of hormones directly into the bloodstream to regulate the body's growth metabolism and sexual development & function. References: http://www.vivo.colostate.edu/hbooks/pathphys/endocrine/hypopit/anatomy.html http://www.vivo.colostate.edu/hbooks/pathphys/endocrine/index.html http://www.khanacademy.org/science/healthcare-and-medicine/v/intro-to-the-endocrine-system http://www.ncbi.nlm.nih.gov/pubmed/21540080" [YouTube Link](https://youtube.com/watch?v=WVrlHH14q3o) 2012-09-10T20:00Z 16.9M followers, 2M engagements "Substitution Reactions - SN1 and SN2 Mechanisms: Crash Course Organic Chemistry #21 Weve already learned a bit about substitution reactions in organic chemistry and the two different paths they can follow: SN1 and SN2. In order to better predict the products of a substitution reaction and understand how they work we need to be able to figure out which mechanism a reaction is likely to follow. In this episode of Crash Course Organic Chemistry well deepen our knowledge of substitution reactions by looking at factors like substrate structure and reaction conditions to determine whether SN1 or" [YouTube Link](https://youtube.com/watch?v=Wxn5jvR-ffQ) 2021-02-08T17:22Z 16.9M followers, 385.8K engagements "Photosynthesis and Cellular Respiration: Crash Course Botany #5 Plants and trees may seem pretty passive but behind the scenes their cells are working hard to put on a magic show. In this episode of Crash Course Botany well explore how the processes of photosynthesis and cellular respiration work why theyre so critical for all life on Earth and how theyre helping us to forge a greener path to the future. Chapters: Plants' Magic Show 00:00 Photosynthesis 1:27 The Light-Dependent Reactions 3:02 The Light-Independent Reactions 4:18 Cellular Respiration 5:32 Biofuels 8:50 Review & Credits 11:43" [YouTube Link](https://youtube.com/watch?v=WzOrF5W4l3Q) 2023-06-22T16:00Z 16.9M followers, 349.2K engagements "The Physics of Music: Crash Course Physics #19 Music plays a big part in many of our lives. Whether you just like to listen or you enjoy playing an instrument music is powerful. So what is music How does it work What are the physics of music In this episode of Crash Course Physics Shini talks to us about how music functions in terms of waves and how these waves interact with our ears. -- Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios -- Want to find Crash Course elsewhere on the internet Facebook - http://www.facebook.com/YouTubeCrashC. Twitter -" [YouTube Link](https://youtube.com/watch?v=XDsk6tZX55g) 2016-08-11T22:27Z 16.9M followers, 852.7K engagements "Graphical User Interfaces: Crash Course Computer Science #26 Today we're going to discuss the critical role graphical user interfaces or GUIs played in the adoption of computers. Before the mid 1980's the most common way people could interact with their devices was through command line interfaces which though efficient aren't really designed for casual users. This all changed with the introduction of the Macintosh by Apple in [----]. It was the first mainstream computer to use a GUI standing on the shoulder of nearly two decades of innovation including work from the father of the GUI himself" [YouTube Link](https://youtube.com/watch?v=XIGSJshYb90) 2017-08-30T21:09Z 16.9M followers, 514.7K engagements "Absolute Monarchy: Crash Course European History #13 So far the rulers of Europe have been working to consolidate their power and expand their kingdoms and this is it. The moment they've been working toward: Absolute Monarchy. We're going to learn about how kings and queens became absolute rulers in Europe and where better to start than with Louis XIV of France who is really the model for absolute rule. Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following patrons for their generous monthly contributions that help" [YouTube Link](https://youtube.com/watch?v=YYPAFqQgbqE) 2019-07-27T15:09Z 16.9M followers, 1.5M engagements "How Laws Affect Your Health: Crash Course Public Health #8 If youve been paying attention to the news since oh say [----] then youll no doubt be aware that public health policy can often create tension. Having policies that affect public health can and does save lives but not all policies affecting our health are health policies. Dont worry were going to break it all down in this episode of Crash Course Public Health where we will discuss how an orthopedic surgeons love of racing helped create seatbelt policies in the US and why sometimes laws governing what can be built where affect our" [YouTube Link](https://youtube.com/watch?v=Z08sh4PN8Lc) 2022-09-22T17:00Z 16.9M followers, 88.1K engagements "International Climate Agreements: Crash Course Climate & Energy #10 Climate change is being addressed by individuals activist groups and large corporations but its going to take getting entire nations on board if we want to really meet our climate goals. In this episode of Crash Course Climate and Energy well learn about the alphabet soup that is global climate organization and take a look at some successful and not-so-successful international climate policies. Chapters: Introduction: Global Cooperation 00:00 The UNEP IPCC & UNFCCC 1:43 The Kyoto Protocol 5:34 The Paris Agreement & Green" [YouTube Link](https://youtube.com/watch?v=Z5YvjG4lTpQ) 2023-04-05T16:00Z 16.9M followers, 58.7K engagements "Latin American Revolutions: Crash Course World History #31 In which John Green talks about the many revolutions of Latin America in the 19th century. At the beginning of the 1800s Latin America was firmly under the control of Spain and Portugal. The revolutionary zeal that had recently created the United States and had taken off Louis XVI's head in France arrived in South America and a racially diverse group of people who felt more South American than European took over. John covers the soft revolution of Brazil in which Prince Pedro boldly seized power from his father but promised to give it" [YouTube Link](https://youtube.com/watch?v=ZBw35Ze3bg8) 2012-08-23T22:09Z 16.9M followers, 5.1M engagements "Venus: Crash Course Astronomy #14 Venus is a gorgeous naked-eye planet hanging like a diamond in the twilight -- but its beauty is best looked at from afar. Even though Mercury is closer to the sun Venus is the hottest planet in the solar system due to a runaway greenhouse effect and has the most volcanic activity in the solar system. Its north and south poles were flipped causing it to rotate backward and making for very strange days on this beautiful but inhospitable world. This episode is brought to you by Squarespace http://www.squarespace.com/crashcourse Check out the Crash Course" [YouTube Link](https://youtube.com/watch?v=ZFUgy3crCYY) 2015-04-24T18:33Z 16.9M followers, 1.8M engagements Limited data mode. Full metrics available with subscription: lunarcrush.com/pricing
@crashcourse CrashCourse
CrashCourse posts on YouTube about education, green, history, hank the most. They currently have [----------] followers and [---] posts still getting attention that total [-------] engagements in the last [--] hours.
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Social Influence
Social category influence countries 21.96% finance 5.44% travel destinations 4.8% technology brands 2.99% currencies #4141 celebrities 2.56% stocks 2.03% social networks 1.39% automotive brands 0.85% gaming 0.43%
Social topic influence education #931, green #1613, history #1918, hank #88, john 20.47%, science #1693, united states #6466, what is #1342, in the 6.29%, the world #4595
Top accounts mentioned or mentioned by @the @curein60_nt @bdbiam @joshlama @wordlessrage @n05albums @n008817671329 @gmailcom @n072819311727 @edtechari @simplscientist @n0213764313763 @gopage216695 @thethoughtemporium @cosmicskeptic @tommocarroll @besmart @veritastruthyt @zenatisyo7182 @falemetv
Top assets mentioned Alphabet Inc Class A (GOOGL)
Top Social Posts
Top posts by engagements in the last [--] hours
"Nonexistent Objects & Imaginary Worlds: Crash Course Philosophy #29 Today we transition between units on language and aesthetics with a discussion of nonexistent and imaginary objects. Is it possible to make true assertions about things that arent real Well explore Meinongs Jungle and the concept of a universe of discourse. -- House of Cards Copyright [----] Netflix Harry Potter Copyright Warner Brothers Hogwarts photo by Rob Young via WikiMedia Commons CC BY [---] https://commons.wikimedia.org/wiki/File:Hogwarts_Castle_(7119191451).jpg -- Produced in collaboration with PBS Digital Studios:"
YouTube Link 2016-09-27T16:45Z 16.9M followers, 895.3K engagements
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"Slavery - Crash Course US History #13 In which John Green teaches you about America's "peculiar institution" slavery. I wouldn't really call it peculiar. I'd lean more toward a horrifying and depressing institution but nobody asked me. John will talk about what life was like for an enslaved person in the 19th century United States and how enslaved people resisted oppression to the degree that was possible. We'll hear about cotton plantations the violent punishment of enslaved people the day-to-day lives of enslaved people and slave rebellions. Nat Turner Harriet Tubman and Whipped Peter all"
YouTube Link 2013-05-02T23:34Z 16.9M followers, 5.5M engagements
"Bureaucracy Basics: Crash Course Government and Politics #15 This week Craig Benzine discusses bureaucracies. Bureaucracies tend to be associated with unintelligible rules and time-wasting procedures but they play an important though controversial role in governing. From the FDA to the EPA these agencies were established to help the government manage and carry out laws much more efficiently - to bring rule-making and enforcement closer to the experts. But the federal bureaucracy (which is part of the executive branch) has a lot of power and sometimes acts like Congress in creating regulations"
YouTube Link 2015-05-09T15:41Z 16.9M followers, 1.7M engagements
"American Imperialism: Crash Course US History #28 In which John Green teaches you about Imperialism. In the late 19th century the great powers of Europe were running around the world obtaining colonial possessions especially in Africa and Asia. The United States which as a young country was especially susceptible to peer pressure followed along and snapped up some colonies of its own. The US saw that Spain's hold on its empire was weak and like some kind of expansionist predator it jumped into the Cuban War for Independence and turned it into the Spanish-Cuban-Phillipino-American War which"
YouTube Link 2013-09-05T23:26Z 16.9M followers, 4.8M engagements
"19th Century Reforms: Crash Course US History #15 In which John Green teaches you about various reform movements in the 19th century United States. From Utopian societies to the Second Great Awakening to the Abolition movement American society was undergoing great changes in the first half of the 19th century. Attempts at idealized societies popped up (and universally failed) at Utopia OH New Harmony IN Modern Times NY and many other places around the country. These utopians had a problem with mainstream society and their answer was to withdraw into their own little worlds. Others didn't like"
YouTube Link 2013-05-15T00:46Z 16.9M followers, 3.2M engagements
"Natural Hazards: Crash Course Geography #27 Today we wrap up the first half of our series on physical geography by taking a closer look at natural hazards - which are physical processes like heat waves and cyclones earthquakes and volcanic eruptions and floods and droughts. And when these natural events cause significant harm to humans we call them natural disasters. So today we'll explore the ways geographers analyze and track these events and take a closer look at the human impact of Hurricane Katrina in New Orleans and The Boxing Day Tsunami on the Andaman and Nicobar islands. Watch our"
YouTube Link 2021-09-20T20:46Z 16.9M followers, 391.4K engagements
"How to Transfer Colleges Crash Course How to College You're already learning on YouTube why not get college credit for it https://link.gostudyhall.com/my1 Sometimes you realize the school you're attending just isn't right for you. Or you discover you want to change majors and a different school has a better program. Or you've completed your gen ed classes at a community college and are ready to transfer to a [--] year institution. For whatever reason transferring is something we may have to deal with to complete our college journeys. And yes it can be a pain. But in this episode of Crash Course:"
YouTube Link 2022-05-26T22:00Z 16.9M followers, 126.5K engagements
"Animals & Shapeshifters: Crash Course Latin American Literature #10 Fish and insects and dogsoh my In this episode of Crash Course Latin American Literature well explore how all things fuzzy buzzy and ferocious can help us understand our own human nature. Introduction: Latin American Animals 00:00 Antnio Vieira 0:46 Alejo Carpentier 3:34 Pilar Quintana 6:27 Review & Credits 8:54 Sources: https://docs.google.com/document/d/1eE7g4-k6PD7C6wNBzeJIO8GCDHpoJl8ldDjKyq_2yYg/edittab=t.0 To learn more check out these videos: https://www.youtube.com/watchv=oyv-eJRRozs"
YouTube Link 2026-01-29T17:00Z 16.9M followers, 20.1K engagements
"Disease Crash Course World History [---] In which John Green teaches you about disease and the effects that disease has had in human history. Disease has been with man since the beginning and it has shaped the way humans operate in a lot of ways. John will teach you about the Black Death the Great Dying and the modern medical revolution that has changed the world. Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse Want to find Crash Course elsewhere on the internet Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter -"
YouTube Link 2014-07-25T01:22Z 16.9M followers, 3.5M engagements
"Making Time Management Work for You: Crash Course Business - Soft Skills #10 Most of us struggle with time management. It's normal. But things need to get done both at work and in your personal life. So in this episode of Crash Course Business Evelyn gives us all some ways to structure our checklist and make sure we get our work done while still not forgetting to take care of ourselves. *** Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following patrons for their generous monthly contributions that help keep Crash"
YouTube Link 2019-05-15T21:00Z 16.9M followers, 339K engagements
"Who Was Karl Marx And Why Is Everyone Still Talking About Him To some Marxism is the solution to all capitalisms problems. To others its a major threat to democracy. But what did Karl Marx really say about capitalism and communism and how can that help shape our discussions today Crash Course Political Theory #6 Introduction: "The Specter of Communism" 00:00 Who Was Marx 0:37 The Problem of Capitalism 4:17 The Mondragon Corporation 6:22 The Proletariat Revolution 8:04 Critiquing Marx 10:04 Review & Credits 11:41 Sources:"
YouTube Link 2024-12-19T17:00Z 16.9M followers, 343.8K engagements
"Keyboards & Command Line Interfaces: Crash Course Computer Science #22 Today we are going to start our discussion on user experience. We've talked a lot in this series about how computers move data around within the computer but not so much about our role in the process. So today we're going to look at our earliest form of interaction through keyboards. We'll talk about how the keyboard got its qwerty layout and then we'll track its evolution in electronic typewriters and eventually terminals with screens. We are going to focus specifically on text interaction through command line interfaces"
YouTube Link 2017-08-02T21:12Z 16.9M followers, 452.5K engagements
"Thermodynamics: Crash Course Physics #23 Have you ever heard of a perpetual motion machine More to the point have you ever heard of why perpetual motion machines are impossible One of the reasons is because of the first law of thermodynamics In this episode of Crash Course Physics Shini talks to us about thermodynamics and entropy. Also we learn about isovolumetric isobaric isothermal and adiabatic processes. It'll all make sense in a minute -- Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios -- Want to find Crash Course elsewhere on the internet"
YouTube Link 2016-09-15T21:27Z 16.9M followers, 2M engagements
"Supervised Learning: Crash Course AI #2 Today were going to teach John Green Bot how to tell the difference between donuts and bagels using supervised learning Supervised learning is the process of learning WITH training labels and is the most widely used kind of learning with it comes to AI - helping with stuff like tagging photos on Facebook and filtering spam from your email. Were going to start small today and show how just a single neuron (or perceptron) is constructed and explain the differences between precision and recall. Next week we'll build our first neural network. Read more"
YouTube Link 2019-08-16T21:15Z 16.9M followers, 478.4K engagements
"Pre-Columbian Theater Spanish Empire and Sor Juana: Crash Course Theater #22 This week we're headed to the Americas to learn about the theater that existed there prior to the arrival of Europeans how the theater of the Spanish influenced it and the impact of Sor Juana Inez de la Cruz playwrighting Spanish nun extraordinaire. Also check out America from Scratch the new series from PBS Digital Studios: http://bit.ly/amscratch_sub Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following Patrons for their generous monthly"
YouTube Link 2018-07-21T18:30Z 16.9M followers, 122K engagements
"The New Deal: Crash Course US History #34 In which John Green teaches you about the New Deal which was president Franklin D. Roosevelt's plan to pull the United States out of the Great Depression of the 1930s. Did it work Maybe. John will teach you about some of the most effective and some of the best-known programs of the New Deal. They weren't always the same thing. John will tell you who supported the New Deal and who opposed it. He'll also get into how the New Deal changed the relationship between the government and citizens and will even reveal just how the Depression ended. (hint: it"
YouTube Link 2013-10-18T19:59Z 16.9M followers, 5M engagements
"Screens & 2D Graphics: Crash Course Computer Science #23 Today we begin our discussion of computer graphics. So we ended last episode with the proliferation of command line (or text) interfaces which sometimes used screens but typically electronic typewriters or teletypes onto paper. But by the early 1960s a number of technologies were introduced to make screens much more useful from cathode ray tubes and graphics cards to ASCII art and light pens. This era would mark a turning point in computing - computers were no longer just number crunching machines but potential assistants interactively"
YouTube Link 2017-08-09T22:15Z 16.9M followers, 395.7K engagements
"Quantum Mechanics - Part 1: Crash Course Physics #43 What is light That is something that has plagued scientists for centuries. It behaves like a wave. and a particle. what Is it both In this episode of Crash Course Physics Shini introduces the idea of quantum mechanics and how it helps us understand light. Also there's this thing called the ULTRAVIOLET CATASTROPHE -- Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios -- Want to find Crash Course elsewhere on the internet Facebook - http://www.facebook.com/YouTubeCrashC. Twitter -"
YouTube Link 2017-03-03T15:59Z 16.9M followers, 2.2M engagements
"Cell Membranes: How Does Stuff Get Into Your Cells: Crash Course Biology #24 The cell membrane is a protein-studded phospholipid bilayer that not only protects our cells but also regulates what goes in and out. In this episode of Crash Course Biology well look at the structure of the bilayer learn about its discovery and explore the many ways substances can be transported into and out of cells. Chapters: Introduction to the Cell Membrane 00:00 Membrane Structure 2:10 Membrane Proteins 4:53 Membrane Transport 7:07 Review & Credits 11:54 This series was produced in collaboration with HHMI"
YouTube Link 2023-12-19T17:00Z 16.9M followers, 245.4K engagements
"What is Climate Change: Crash Course Climate & Energy #1 We know that temperatures on Earth have fluctuated dramatically in the past but we also know that by burning fossil fuels we are causing temperatures to rise faster than ever. In this episode of Crash Course Climate and Energy well introduce some core concepts that will help us throughout the series like the difference between climate and weather and take a look back through the Earths history at other periods of significant climate change. Chapters: Introduction: Climate Change 00:00 The Greenhouse Effect 2:16 Earth's Climate Record"
YouTube Link 2022-12-07T17:00Z 16.9M followers, 250.7K engagements
"Plant Cells: Crash Course Biology #6 Hank describes why plants are so freaking amazing - discussing their evolution and how their cells are both similar to & different from animal cells. Watching this after [----] Here's an updated video about plant cells from Crash Course Botany: https://youtu.be/y9BLCfcUcFg Table of Contents annotations: [--]. Introduction 0:00 [--]. Plant Evolution 0:56 [--]. Eukaryotic vs. Prokaryotic Cells 2:33 [--]. Cellulose and Lignin 3:58 [--]. Plastids and Chloroplasts 7:05 [--]. Central Vacuole 8:10 This video uses sounds from Freesound.org Crash Course is on Patreon You can support"
YouTube Link 2012-03-05T21:50Z 16.9M followers, 3.4M engagements
"The Power of Motivation: Crash Course Psychology #17 Feeling motivated Even if you are do you know why The story of Aaron Ralston can tell us a lot about motivation. In this episode of Crash Course Psychology Hank tells us Ralston's story as well as [--] theories of motivation and some evolutionary perspectives on motivation. Want more videos about psychology Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych -- Chapters: Introduction: Motivation 00:00 What is Motivation 1:08 Evolutionary Perspective: Instincts 1:29 Drive-Reduction Theory: Homeostasis & Incentives"
YouTube Link 2014-06-02T23:22Z 16.9M followers, 3.2M engagements
"Controversy of Intelligence: Crash Course Psychology #23 So how many different kinds of intelligence are there And what is the G-Factor Eugenics Have you ever taken an IQ Test All of these things play into the fascinating and sometimes icky history of Intelligence Testing. In this episode of Crash Course Psychology Hank talks us through some of the important aspects of that history. as well as Nazis. Hey I said some of it was icky. Want more videos about psychology Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych -- Chapters: Introduction: Defining"
YouTube Link 2014-07-21T18:43Z 16.9M followers, 3.5M engagements
"How Rivers Shape the Landscape: Crash Course Geography #23 Today we're going to talk about rivers and how these dynamic delicate yet powerful systems are able to constantly change the landscape. We'll focus on the Zambezi River in Southeast Africa following its main features from the tributaries that feed into it in the upper course to the deafening wonder that is Mosi-oa-Tunya waterfall (also called as Victoria Falls) in the middle course all the way to the delta as the river flows into the Indian Ocean. Along the way we'll teach you all about why rivers meander why some rivers have rapids"
YouTube Link 2021-08-10T16:15Z 16.9M followers, 323.1K engagements
"Is Atheism a Religion: Crash Course Religions #13 Atheism is far from new but the various ways that people say no thank you to belief in gods deities or particular religions are so diverse that theyve had a huge impact on world belief systems. In this episode of Crash Course Religions we break down the different flavors of atheism and nonbelief and ask the question Is atheism a religion Introduction: Is God Dead 00:00 The History of Atheism 1:13 Atheism Today 3:17 To Believe or Not to Believe 4:20 Atheism Around the World 5:29 Atheism as Critique 7:02 Qualities of Religion & Atheism 8:15"
YouTube Link 2024-12-03T17:00Z 16.9M followers, 240.7K engagements
"How World War I Started: Crash Course World History [---] In which John Green teaches you about World War I and how it got started. Crash Course doesn't usually talk much about dates but the way that things unfolded in July and August of [----] is kind of important to understanding the Great War. You'll learn about Franz Ferdinand Gavrilo Princip the Black Hand and why the Serbian nationalists wanted to kill the poor Archduke. You'll also learn who mobilized first and who exactly started the war. Sort of. Actually there's no good answer to who started the war but we give it a shot anyway. Crash"
YouTube Link 2014-09-13T00:07Z 16.9M followers, 7M engagements
"What are the Patterns of Border Conflicts Crash Course Geography #37 Today were going to take a closer look at borders and the stories they tell. When we look at a map the shapes were seeing can seem so permanent but a map is just a snapshot of the Earth at a particular time and by looking a countries shape (and how it has changed across time) we can learn so much about how power moves and the ebb and flow of conflict. Well talk about the different types of borders and power dynamics at play in Armenia and Azerbaijan and even look to the oceans as we explore conflict in the South China Sea."
YouTube Link 2021-12-13T18:43Z 16.9M followers, 120.9K engagements
"Joints: Crash Course Anatomy & Physiology #20 We continue our look at your bones and skeletal system skipping over the silly kid's song in favor of a more detailed look at your axial and appendicular skeleton. This episode also talks about the structural and functional classifications of your joints and the major types of body movement that they facilitate. Pssst. we made flashcards to help you review the content in this episode Find them on the free Crash Course App Download it here for Apple Devices: https://apple.co/3d4eyZo Download it here for Android Devices: https://bit.ly/2SrDulJ"
YouTube Link 2015-05-26T21:00Z 16.9M followers, 4.1M engagements
"How Does Disease Move Crash Course Geography #34 From outbreaks of measles in the United States and cholera in Haiti to patterns of lead poisoning near gold mines in Nigeria medical geographers play an important role in tracking disease in the landscape. Today we're going to look at strategies medical geographers use to help as many people as possible achieve the highest level of health possible. Our sources: https://docs.google.com/document/d/1ldkfmEnwz4BCE76sxR1seA7d2L0jyVxX4Bc9YH0Tqog/editusp=sharing Watch our videos and review your learning with the Crash Course App Download here for"
YouTube Link 2021-11-15T19:35Z 16.9M followers, 99.9K engagements
"☁ What is a Cloud Crash Course Geography #10 In addition to just being beautiful one-of-a-kind panoramas in the sky clouds can tell us so much about how energy and weather patterns flow around the globe. Today we'll talk about how clouds form the three main types (cirrus status and cumulus) explain how and why we get rain and end with a discussion on humidity and how high humidity can feel hot and sticky on a warm day but comfortable on a cold day. So join us and countless people throughout history and look up -- at the clouds Watch our videos and review your learning with the Crash Course"
YouTube Link 2021-03-08T21:22Z 16.9M followers, 420.8K engagements
"The Facts about Fact Checking: Crash Course Navigating Digital Information #2 We're off to fact-checking school. This time John Green is teaching you how to fact-check like the pros. We're going to walk through the steps that professionals follow including figuring out who is behind the information we read why they're sharing that information and what kind of evidence exists to back up the claim. We'll also talk about the difference between skepticism and cynicism. Special thanks to our partners from MediaWise who helped create this series: The Poynter Institute The Stanford History Education"
YouTube Link 2019-01-15T21:36Z 16.9M followers, 748K engagements
"Taxes & Smuggling - Prelude to Revolution: Crash Course US History #6 In which John Green teaches you about the roots of the American Revolution. The Revolution did not start on July [--] [----]. The Revolutionary War didn't start on July [--] either. (as you remember I'm sure the Revolution and the Revolutionary War are not the same thing) The shooting started on April [--] [----] at Lexington and/or Concord MA. Or the shooting started with the Boston Massacre on March [--] [----]. At least we can pin down the Declaration of Independence to July [--] [----]. Except that most of the signers didn't sign until"
YouTube Link 2013-03-07T23:50Z 16.9M followers, 5.3M engagements
"Medieval China: Crash Course History of Science #8 Like Egypt Sumer and Mesoamerica ancient China represents a hydraulic civilizationone that maintained its population by diverting rivers to aid in irrigationand one that developed writing thousands of years ago. Today were going to focus on the time of the Northern and Southern Song Dynasties a time of great technical innovation. But before we get to the Song lets take a tour through the ages and explore key elements of Chinese scientific culture. *** Crash Course is on Patreon You can support us directly by signing up at"
YouTube Link 2018-05-21T22:30Z 16.9M followers, 865.6K engagements
"The Heart Part [--] - Heart Throbs: Crash Course Anatomy & Physiology #26 Today we're talking about the heart and heartthrobs -- both literal and those of the televised variety. Hank explains how your hearts pacemaker cells use leaky membranes to generate their own action potentials and how the resulting electricity travels through the cardiac conduction pathway from SA Node to Purkinje fibers allowing your heart to contract. He's also going to make you better able to spot inaccuracies in medical dramas by explaining how defibrillators work to reset the rhythm of your heart. Pssst. we made"
YouTube Link 2015-07-13T22:02Z 16.9M followers, 3.2M engagements
"Nuclear Chemistry Part [--] - Fusion and Fission: Crash Course Chemistry #39 Continuing our look at Nuclear Chemistry Hank takes this episode to talk about Fusion and Fission. What they mean how they work their positives negatives and dangers. Plus E=mc2 Mass Defect and Applications of Fission and Fusion in the real world Pssst. we made flashcards to help you review the content in this episode Find them on the free Crash Course App Download it here for Apple Devices: https://apple.co/3d4eyZo Download it here for Android Devices: https://bit.ly/2SrDulJ -- Table of Contents E=mc2 Mass Defect"
YouTube Link 2013-11-19T21:40Z 16.9M followers, 1.3M engagements
"Tribal Sovereignty Explained: Ep [--] of Crash Course Native American History What is tribal sovereignty In this episode of Crash Course Native American History well explore how tribes can and cant govern themselves and why sovereignty isnt something the U.S. ever gave to tribes its an inherent right they already had. Introduction: The Chinook 00:00 What is tribal sovereignty 0:42 Tribal sovereignty in the US 1:57 Plenary power 3:23 The benefits of tribal sovereignty 5:39 The limitations of tribal sovereignty 8:16 Review & Credits 9:59 Sources:"
YouTube Link 2025-05-13T16:00Z 16.9M followers, 143.5K engagements
"Biological Molecules - You Are What You Eat: Crash Course Biology #3 Hank talks about the molecules that make up every living thing - carbohydrates lipids and proteins - and how we find them in our environment and in the food that we eat. Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse Want to find Crash Course elsewhere on the internet Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Instagram - https://www.instagram.com/thecrashcourse/ CC Kids:"
YouTube Link 2012-02-13T23:53Z 16.9M followers, 7.6M engagements
"What Is Myth Crash Course World Mythology #1 Welcome to Crash Course World Mythology our latest adventure (and this series may be literally adventurous) in education. Over the next [--] episodes or so we and Mike Rugnetta are going to learn about the world by looking at the foundational stories of a bunch of different cultural traditions. Were going to look at the ways that peoples stories define them and the ways they shape their culture. Were going to learn about gods goddesses heroes and tricksters and a lot more. Were going to walk the blurry line between myth and religion and were going to"
YouTube Link 2017-02-25T00:56Z 16.9M followers, 2.8M engagements
"Galaxies part 1: Crash Course Astronomy #38 The Milky Way is our neighborhood in the universe. Its a galaxy and there are many others out there. Galaxies contain gas dust and billions of stars or more. They come in four main shapes: elliptical spiral peculiar and irregular. Galaxies can collide and grow in size by eating each other. Check out the Crash Course Astronomy poster here: http://store.dftba.com/products/crashcourse-astronomy-poster -- Chapters: Introduction: Galaxies 00:00 Spiral Galaxies 3:00 Elliptical Galaxies 5:22 Galactic Collisions 6:18 Peculiar Galaxies 8:46 Irregular"
YouTube Link 2015-10-29T22:13Z 16.9M followers, 1.7M engagements
"Light Is Waves: Crash Course Physics #39 The way light behaves can seem very counterintuitive and many physicists would agree with that but once you figure out light waves it all starts to make more sense In this episode of Crash Course Physics Shini shows us how we know that light exists as a wave and why that's really cool -- Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios -- Want to find Crash Course elsewhere on the internet Facebook - http://www.facebook.com/YouTubeCrashC. Twitter - http://www.twitter.com/TheCrashCourse Tumblr -"
YouTube Link 2017-01-26T23:43Z 16.9M followers, 1.3M engagements
"Federalism: Crash Course Government and Politics #4 In which Craig Benzine teaches you about federalism or the idea that in the United States power is divided between the national government and the [--] state governments. Craig will teach you about how federalism has evolved over the history of the US what powers are given to the federal government and what stuff the states control on their own. And he punches an eagle which may not surprise you at all. Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios Support is provided by Voqal: http://www.voqal.org"
YouTube Link 2015-02-14T21:26Z 16.9M followers, 3.8M engagements
"Neural Networks: Crash Course Statistics #41 Today we're going to talk big picture about what Neural Networks are and how they work. Neural Networks which are computer models that act like neurons in the human brain are really popular right now - they're being used in everything from self-driving cars and Snapchat filters to even creating original art As data gets bigger and bigger neural networks will likely play an increasingly important role in helping us make sense of all that data. Special thanks to Max Deutsch giving us permission to use his Neural Network-written Harry Potter chapter"
YouTube Link 2018-12-12T21:28Z 16.9M followers, 94.4K engagements
"How Populations Grow and Change: Crash Course Geography #33 Is the world overpopulated or underpopulated While we worry about there being too many people for the planet to support we can also worry about how fewer people in a given place may affect the economy what may happen when there are more elderly people who need care than there are healthcare workers or even be concerned about how many people are necessary to carry on other aspects of culture. Today we'll discuss Malthusian and Boserup predictions on the planet's carrying capacity and take a close look at a popular demography tool"
YouTube Link 2021-11-08T19:31Z 16.9M followers, 394.2K engagements
"Files & File Systems: Crash Course Computer Science #20 Today were going to look at how our computers read and interpret computer files. Well talk about how some popular file formats like txt wave and bitmap are encoded and decoded giving us pretty pictures and lifelike recordings from just strings of 1s and 0s and well discuss how our computers are able to keep all this data organized and readily accessible to users. Youll notice in this episode that were starting to talk more about computer users not programmers foreshadowing where the series will be going in a few episodes. Pre-order our"
YouTube Link 2017-07-12T22:07Z 16.9M followers, 879K engagements
"The Personal Computer Revolution: Crash Course Computer Science #25 Today we're going to talk about the birth of personal computing. Up until the early 1970s components were just too expensive or underpowered for making a useful computer for an individual but this would begin to change with the introduction of the Altair [----] in [----]. In the years that follow we'll see the founding of Microsoft and Apple and the creation of the [----] Trinity: The Apple II Tandy TRS-80 and Commodore PET [----]. These new consumer oriented computers would become a huge hit but arguably the biggest success of the"
YouTube Link 2017-08-23T21:08Z 16.9M followers, 362.1K engagements
"White Dwarfs & Planetary Nebulae: Crash Course Astronomy #30 Today Phil follows up last weeks look at the death of low mass stars with what comes next: a white dwarf. White dwarfs are incredibly hot and dense objects roughly the size of Earth. They also can form planetary nebulae: huge intricately detailed objects created when the wind blown from the dying stars is lit up by the central white dwarf. They only last a few millennia. The Sun probably wont form one but higher mass stars do. Check out the Crash Course Astronomy solar system poster here:"
YouTube Link 2015-08-27T21:00Z 16.9M followers, 1.2M engagements
"Shaping Public Opinion: Crash Course Government and Politics #34 So today Craig is going to talk about where our political opinions come from. Of course most peoples politics are grounded in their ideologies but there are also other external influences such as the government itself interest groups and the media. So we're going to talk about how these influencers factor into the overall public opinion and how their roles have changed over time. Now this stuff may seem like common sense but its important to know where our opinions come from especially when you consider how quickly the media"
YouTube Link 2015-10-09T23:04Z 16.9M followers, 614.4K engagements
"A World Without Governments Anarchism Explained The word anarchy is synonymous with chaos but what does it mean to political theorists In this episode of Crash Course Political Theory we explore the theories and practices of anarchism. Crash Course Political Theory #7 Introduction: 00:00 What Is Anarchy 0:42 Classical Anarchy 3:28 Collectivism 4:54 Anarchist Communism 5:39 Modern Anarchy 6:39 Review & Credits 10:30 Special thanks to Chris Boland for the use of his portrait of Rebecca Solnit / www.chrisboland.com Sources:"
YouTube Link 2025-01-02T17:00Z 16.9M followers, 302.8K engagements
"High Mass Stars: Crash Course Astronomy #31 Massive stars fuse heavier elements in their cores than lower-mass stars. This leads to the creation of heavier elements up to iron. Iron robs critical energy from the core causing it to collapse. The shock wave together with a huge swarm of neutrinos blasts through the stars outer layers causing it to explode. The resulting supernova creates even more heavy elements scattering them through space. Also happily were in no danger from a nearby supernova. Check out the Crash Course Astronomy solar system poster here:"
YouTube Link 2015-09-10T21:00Z 16.9M followers, 2.2M engagements
"Napoleon Bonaparte: Crash Course European History #22 We try not to get into too much great man history here at Crash Course but we have to admit: Napoleon Bonaparte is a pretty big deal. Join us as we track the rise further rise fall rise fall mortal fall and posthumous rise of Napoleon. This guy changed France he changed Europe and in a lot of ways he changed the world. Sources -Al-Jabarti Abd al-Rahman Napoleon in Egypt: Al-Jabartis Chronicle of the French Occupation of [----] Shmuel Moreh ed. Princeton: Markus Wiener [----]. -Bell David A. Napoleon: A Concise Biography. New York: Oxford"
YouTube Link 2019-10-22T02:04Z 16.9M followers, 2.7M engagements
"What is a Game: Crash Course Games #1 Welcome to Crash Course Games In this series our host Andre Meadows is going to discuss the history and science of games. Were going to talk about video games of course but also board games role playing games card games even sports But before we get ahead of ourselves we are going to look at what a game actually is who is playing these games and what they are doing to us. It turns out these answers arent as obvious as they would seem but one thing is definitely clear: games make up a huge portion of most peoples lives and we think that can be a great"
YouTube Link 2016-04-01T23:59Z 16.9M followers, 1M engagements
"The Dark Ages.How Dark Were They Really: Crash Course World History #14 John Green teaches you about the so-called Dark Ages which it turns out weren't as uniformly dark as you may have been led to believe. While Europe was indeed having some issues many other parts of the world were thriving and relatively enlightened. John covers European Feudalism the cultural blossoming of the Islamic world and the scientific and artistic advances in China all during these "Dark Ages." Along the way John will raise questions about the validity of Europe's status as a continent reveal the best and worst"
YouTube Link 2012-04-26T23:58Z 16.9M followers, 8.7M engagements
"Media & Money: Crash Course Media Literacy #5 Media isnt just movies and newspapers and TV shows its also a part of society that involves a lot of money. And all that money has implications for the media that gets created. Media is created by people -- a range of people making a range of decisions and earning a range of different paychecks to do it. Those decisions matter and understanding how money affects those decisions is an essential component of media literacy. Introduction: Your Media on Money 0:00 Let's say you're a movie director 1:04 Media is made 2:01 Purpose or why media is"
YouTube Link 2018-03-27T20:01Z 16.9M followers, 250.1K engagements
"Let's Talk About Sex: Crash Course Psychology #27 Sex is complicated for different reasons in different cultures. But it's the entire purpose of life so there's no reason to blush. In this episode of Crash Course Psychology Hank talks about Kinsey Masters and Johnson Sexuality Gender Identity and Hormones and even looks into the idea of why we have sex. There's a lot to go through here. Want more videos about psychology Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych -- Chapters: Introduction: Alfred Kinsey 00:00 Biological Sex & Gender Identity 2:01 Masters"
YouTube Link 2014-08-18T23:57Z 16.9M followers, 7.5M engagements
"Population Ecology: The Texas Mosquito Mystery - Crash Course Ecology #2 Population ecology is the study of groups within a species that interact mostly with each other and it examines how they live together in one geographic area to understand why these populations are different in one time and place than they are in another. How is that in any way useful to anyone ever Hank uses the example of the West Nile virus outbreak in Texas to show you in this episode of Crash Course: Ecology. Table of Contents 1) Density & Dispersion 02:03 2) Population Growth 03:07 3) Limiting Factors 03:45 a)"
YouTube Link 2012-11-12T22:45Z 16.9M followers, 1.9M engagements
"Rap and Hip Hop: Crash Course Black American History #47 Music is an integral part of Black American culture. Today Clint Smith will teach you about rap & hip hop and the cultural significance of artists including Public Enemy Wu-Tang Clan the Notorious B.I.G. Tupac N.W.A. Queen Latifah and Missy Elliott. And he just might break dance while doing it. Clint's book How the Word is Passed is available now https://bookshop.org/books/how-the-word-is-passed-a-reckoning-with-the-history-of-slavery-across-america/9780316492935 SOURCES: https://www.nbcnews.com/id/wbna19680493 Janell Hobson and R."
YouTube Link 2022-09-20T19:00Z 16.9M followers, 484.9K engagements
"The Silent Era: Crash Course Film History #9 The Silent Era of Hollywood set a lot of things into motion in terms of how movies were made and sold. Big stars were one of the main ways studios tried to make their movies stand apart from one another and get the public to make choices at the cinema. But this also gave a lot of power to those stars to command a lot of money. In this episode of Crash Course Film History we take a look at the Silent Era of Hollywood and people like Charlie Chaplin. Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios Want to know"
YouTube Link 2017-06-08T21:31Z 16.9M followers, 404.1K engagements
"Education In Society: Crash Course Sociology #40 Today well explore the history of education as a social institution with a specific focus on how the US organizes its educational system. Well look at education through the lenses of some sociological paradigms: structural functionalist approaches (including some of the manifest and latent functions associated with education) and a symbolic interactionist approach to education that shows us how self-fulfilling prophecies in educational settings contribute to differences in academic outcomes for students. Crash Course is made with Adobe Creative"
YouTube Link 2018-01-15T21:48Z 16.9M followers, 600.8K engagements
"Christianity from Judaism to Constantine: Crash Course World History #11 In which John Green teaches you the history of Christianity from the beginnings of Judaism and the development of monotheism right up to Paul and how Christianity stormed the Roman Empire in just a few hundred years. Along the way John will cover Abram/Abraham the Covenant the Roman Occupation of Judea and the birth life death and legacy of Jesus of Nazareth. No flame wars Let's keep the commentary civil. Chapters: Introduction: The Son of God 00:00 Understanding the Jewish Tradition 0:33 Herod and Herod - Roman Rulers"
YouTube Link 2012-04-05T22:32Z 16.9M followers, 10.2M engagements
"Venice and the Ottoman Empire: Crash Course World History #19 In which John Green discusses the strange and mutually beneficial relationship between a republic the city-state of Venice and an Empire the Ottomans--and how studying history can help you to be a better boyfriend/girlfriend. Together the Ottoman Empire and Venice grew wealthy by facilitating trade: The Venetians had ships and nautical expertise; the Ottomans had access to many of the most valuable goods in the world especially pepper and grain. Working together across cultural and religious divides they both become very rich and"
YouTube Link 2012-05-31T21:07Z 16.9M followers, 4.5M engagements
"Congressional Delegation: Crash Course Government and Politics #13 In which Craig Benzine teaches you about delegation and informal powers. What are all these federal agencies about Well the President has a lot of stuff to do as the chief executive and as much as Americans like to talk about personal responsibility the President can't really do all this stuff alone. Because it's a huge job Same deal with Congress. So they delegate authority. This is where all the government agencies and stuff come from. Congress creates them to actually get around to enforcing laws. You'll learn about stuff"
YouTube Link 2015-04-24T22:02Z 16.9M followers, 556.5K engagements
"To The Moon & Mars - Aerospace Engineering: Crash Course Engineering #34 This week were exploring aerospace engineering and its two main fields: aeronautical engineering and astronautical engineering. Well explore life & buoyancy propulsion systems and the challenges of managing the human body in space. Crash Course Engineering is produced in association with PBS Digital Studios: https://www.youtube.com/playlistlist=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV PBS Space Time: https://www.youtube.com/channel/UC7_gcs09iThXybpVgjHZ_7g *** RESOURCES: https://www.history.com/topics/space-race"
YouTube Link 2019-01-31T21:04Z 16.9M followers, 368.4K engagements
"Due Process of Law: Crash Course Government and Politics #28 This week Craig is going to continue our discussion of due process. Technically we started last week with the 4th amendment and search and seizure but this week were going to look at the 5th and 6th amendments and how they ensure a fair trial. Well talk about some stuff you tend to hear a lot on tv like your right to an attorney and a jury of your peers and also terms like double jeopardy and pleading the fifth. Now this stuff can get pretty complicated which is where lawyers come in handy but its important to know your liberties to"
YouTube Link 2015-08-22T00:20Z 16.9M followers, 1.1M engagements
"Political Parties: Crash Course Government and Politics #40 Today Craig is going to talk about political parties and their role in American politics. So when most people think about political parties they associate them with the common ideologies of the voters and representatives within that party but the goal of a party is NOT to influence policies. The role of political parties is much simpler: to win control of the government. So today were going got talk about why we have political parties in the first place and then finish with the five functions they use in reaching that goal. Its a lot"
YouTube Link 2015-12-05T01:17Z 16.9M followers, 2.2M engagements
"Aggression vs. Altruism: Crash Course Psychology #40 In our final episode of Crash Course Psychology Hank discusses the ideas of Aggression and Altruism. These two things are difficult to understand and explain so sit tight and get ready to run the gauntlet of human emotions. Want more videos about psychology Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych -- Chapters: Introduction: Robber's Cave Experiment 00:00 Conflict vs. Cooperation 2:26 Aggression 3:05 Genetic Neurological & Biochemical Reasons for Aggression 3:26 Frustration-Aggression Hypothesis 4:24"
YouTube Link 2014-11-24T22:00Z 16.9M followers, 1.7M engagements
"Heat Transfer: Crash Course Engineering #14 Today were talking about heat transfer and the different mechanisms behind it. Well explore conduction the thermal conductivity of materials convection boundary layers and radiation. Crash Course Engineering is produced in association with PBS Digital Studios: https://www.youtube.com/playlistlist=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV *** RESOURCES: https://www.grc.nasa.gov/www/k-12/airplane/thermo1.html http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/firlaw.html http://coolcosmos.ipac.caltech.edu/cosmic_classroom/light_lessons/thermal/transfer.html"
YouTube Link 2018-08-23T20:02Z 16.9M followers, 858K engagements
"Intro to Genetics: Why Your Cat Looks Like That: Crash Course Biology #31 How do traits get passed down in our DNA And what do genes have to do with cat fur In this episode of Crash Course Biology well untangle the simplest patterns of inheritance and reassure our redheaded friendsyoure not going anywhere. Chapters: Are Redheads Going Extinct 00:00 Alleles & Traits 1:32 Patterns of Inheritance 4:50 Autosomal Dominance 5:56 Incomplete Dominance 7:51 Codominance 8:47 Review & Credits 10:20 This series was produced in collaboration with HHMI BioInteractive committed to empowering educators and"
YouTube Link 2024-02-20T17:00Z 16.9M followers, 177.9K engagements
"Ancient Egypt: Crash Course World History #4 In which John covers the long long history of ancient Egypt including the Old Middle and New Kingdoms and even a couple of intermediate periods. Learn about mummies pharaohs pyramids and the Nile with John Green. Chapters: Introduction: Ancient Egypt 00:00 How The Nile Shaped Egypt 1:57 The Old Kingdom of Egypt 4:02 The Middle Kingdom of Egypt 6:29 The New Kingdom of Egypt 7:54 An Open Letter to King Tut 9:18 Credits 11:14 Resources: Mummies: https://goo.gl/BvAdmj Pyramids: http://goo.gl/aCov2j Crash Course is on Patreon You can support us directly"
YouTube Link 2012-02-16T20:06Z 16.9M followers, 8.5M engagements
"Japan in the Heian Period and Cultural History: Crash Course World History [---] In which John Green teaches you about what westerners call the middle ages and the lives of the aristocracy.in Japan. The Heian period in Japan lasted from 794CE to 1185CE and it was an interesting time in Japan. Rather than being known for a thriving economy or particularly interesting politics the most important things to come out of the Heian period were largely cultural. There was a flourishing of art and literature in the period and a lot of that culture was created by women. The Tale of Genji by Murasaki"
YouTube Link 2015-03-05T01:35Z 16.9M followers, 3.1M engagements
"Voltage Electric Energy and Capacitors: Crash Course Physics #27 So how do those defibrillators you see on TV actually work Surprise Physics can explain Okay buckle up everyone Today Shini has the task of breaking down electrical potential energy electric potential voltage capacitors energy storage and potential energy. it's a lot -- Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios -- Want to find Crash Course elsewhere on the internet Facebook - http://www.facebook.com/YouTubeCrashC. Twitter - http://www.twitter.com/TheCrashCourse Tumblr -"
YouTube Link 2016-10-14T20:33Z 16.9M followers, 888.4K engagements
"The Reproductive System: How Gonads Go - CrashCourse Biology #34 Hank lets us in on the meaning of life at least from a biological perspective - it's reproduction which answers the essential question of all organisms: how do I make more of myself So sex how does it work Table of Contents 1) Gametes: Ova and Sperm 2:27 2) Sex Determination 4:59 3) Secondary Sexual Characteristics 6:48 4) Female Reproductive Structures 7:25 a) Uterus & Oviducts 7:40 b) Endometrium (Menstruation) 7:57 c) Cervix & Vagina 8:32 5) Male Reproductive Structures 8:45 a) Scrotum Sminferous Tubules & Epididymas 8:59 b)"
YouTube Link 2012-09-17T20:37Z 16.9M followers, 1.2M engagements
"Intro to Epidemiology: Crash Course Public Health #6 Epidemiology is the study of patterns of diseases. And most people might think that means epidemiologists are only studying things like Ebola. But the truth is much more varied. In this episode of Crash Course Public Health we'll take a look at the different ways Epidemiology is conducted including the use of.pie It'll make sense we promise. Check out our shared playlist with APHA: https://www.youtube.com/playlistlist=PLDjqc55aK3kywF2dd97_Jh5iP0d2ARhdo Vanessas channel: https://www.youtube.com/braincraft Sources:"
YouTube Link 2022-09-08T17:00Z 16.9M followers, 298.1K engagements
"Social Groups: Crash Course Sociology #16 How do the groups that you're part of affect you How do you in turn affect those groups Today we are talking about how people in society come together with a look at social groups. Well look at what social groups are the different kinds of groups that exist group dynamics leadership conformity networks and more Crash Course is made with Adobe Creative Cloud. Get a free trial here: https://www.adobe.com/creativecloud.html *** Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the"
YouTube Link 2017-07-03T20:02Z 16.9M followers, 880.7K engagements
"Imperialism: Crash Course World History #35 In which John Green teaches you about European Imperialism in the 19th century. European powers started to create colonial empires way back in the 16th century but businesses really took off in the 19th century especially in Asia and Africa. During the 1800s European powers carved out spheres of influence in China India and pretty much all of Africa. While all of the major (and some minor) powers in Europe participated in this new imperialism England was by far the most dominant once able to claim that the "sun never set on the British Empire." Also"
YouTube Link 2012-09-20T21:22Z 16.9M followers, 7.1M engagements
"Cybersecurity: Crash Course Computer Science #31 Cybersecurity is a set of techniques to protect the secrecy integrity and availability of computer systems and data against threats. In todays episode were going to unpack these three goals and talk through some strategies we use like passwords biometrics and access privileges to keep our information as secure but also as accessible as possible. From massive Denial of Service or DDos attacks to malware and brute force password cracking there are a lot of ways for hackers to gain access to your data so well also discuss some strategies like"
YouTube Link 2017-10-11T21:37Z 16.9M followers, 1.2M engagements
"The Medieval Islamicate World: Crash Course History of Science #7 The religion of Islam significantly influenced knowledge-making in the greater Mediterranean and western Asian world. Islamicate scholarsmeaning people influenced by Islamic civilization regardless of their religious viewsgave us terms such as algebra azimuth algorithm alcohol alkali and alembic. Well dive into Islamic medicine and philosophers such as the great Persian polymath Ibn Sina in future episodes. For now lets explore the beginnings of Islamicate natural philosophy. It's really cool you guys *** Crash Course is on"
YouTube Link 2018-05-14T22:00Z 16.9M followers, 1.3M engagements
"What Are Volcanoes Crash Course Geography #21 Today were going to take a closer look at these beautiful but dangerous landforms as we explore the different types of volcanoes and trace the patterns of volcanic activity around the world. From the explosive power of a stratovolcano like Mount St. Helens in Washington to the quiet but consistent eruptions of a shield volcano like Klauea in Hawaii volcanoes are like windows into the center of the Earth helping us understand more about how it all works. Watch our videos and review your learning with the Crash Course App Download here for Apple"
YouTube Link 2021-07-26T20:10Z 16.9M followers, 377K engagements
"The Americas and Time Keeping: Crash Course History of Science #5 In this episode of Crash Course History of Science we travel to the Americas to ask the question "When are we" and get some answers. We'll look at the Maya Inca and Olmec civilizations and how they recorded their science. *** Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever: Mark Brouwer Glenn Elliott Justin Zingsheim Jessica Wode Eric Prestemon"
YouTube Link 2018-05-01T00:28Z 16.9M followers, 617.8K engagements
"Crash Course Psychology Preview Welcome to Crash Course Psychology Want more videos about psychology Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse Want to find Crash Course elsewhere on the internet Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Instagram - https://www.instagram.com/thecrashcourse/ CC Kids: http://www.youtube.com/crashcoursekids"
YouTube Link 2014-01-27T23:19Z 16.9M followers, 1.9M engagements
"Feeling All the Feels: Crash Course Psychology #25 In this episode of Crash Course Psychology Hank talks about these things called "Emotions". What are they And why do we need them Want more videos about psychology Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych -- Chapters: Introduction: Emotions 00:00 Theories on Emotions 2:11 Cognition & Emotion 3:35 The Spillover Effect 4:22 Top-Down vs Bottom-Up Approaches to Cognitive Processing 6:09 The Autonomic Nervous System 8:10 Optimal Arousal 8:39 Review & Credits 10:03 -- Crash Course is on Patreon You can"
YouTube Link 2014-08-05T05:18Z 16.9M followers, 2.3M engagements
"Vascular Plants = Winning - Crash Course Biology #37 Hank introduces us to one of the most diverse and important families in the tree of life - the vascular plants. These plants have found tremendous success and their secret is also their defining trait: conductive tissues that can take food and water from one part of a plant to another part. Though it sounds simple the ability to move nutrients and water from one part of an organism to another was an evolutionary breakthrough for vascular plants allowing them to grow exponentially larger store food for lean times and develop features that"
YouTube Link 2012-10-08T21:37Z 16.9M followers, 1.7M engagements
"Frankenstein Part 2: Crash Course Literature [---] In which John Green continues to teach you about Mary Shelley's Frankenstein. You'll learn about romantic vs Romantic the latter of which is a literary movement. John will also look at a few different critical readings of Frankenstein and you'll learn about Victor's motivations. We'll also look a little bit at the moral limitations of science if there are any. Consider supporting local bookstores by purchasing your books through our Bookshop affiliate link https://bookshop.org/shop/complexly or at your local bookseller. Crash Course is on"
YouTube Link 2014-04-03T22:19Z 16.9M followers, 1.2M engagements
"Let's make a movie recommendation system: Crash Course AI #16 Follow along: https://colab.research.google.com/drive/1-v9cw18wTDjaCUlECKHsQnHeisLKyG8U We need to save Jabril and John Green Bots movie nights. Jabril generally likes action movies and John Green Bot likes romantic movies but they need to find something that they can both watch and enjoy together. Today were going to build a movie recommender systems to find that perfect movie. With the help of the LensKit library our AI will use existing movie ratings from the MovieLens dataset and personalized ratings from Jabril and John Green"
YouTube Link 2019-11-29T21:30Z 16.9M followers, 81.3K engagements
"The Death and Resurrection of Theater as.Liturgical Drama: Crash Course Theater #8 As the Roman Empire fell so did the theater. If there's anyone who hates theater and actors more than Romans it's early Christians. As Christianity ascended in the west theater declined. But fear not. This isn't the end of the series. Theater would be back and in the best subversive theater-y fashion it would return via the Catholic mass Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following Patrons for their generous monthly"
YouTube Link 2018-04-06T20:10Z 16.9M followers, 239.8K engagements
"Civil Rights & Liberties: Crash Course Government & Politics #23 Today Craig is going to give you an overview of civil rights and civil liberties. Often these terms are used interchangeably but they are actually very different. Our civil liberties contained in the Bill of Rights once only protected us from the federal government but slowly these liberties have been incorporated to protect us from the states. Well take a look at how this has happened and the supreme court cases that got us here. Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios Support is"
YouTube Link 2015-07-18T00:26Z 16.9M followers, 1.7M engagements
"Silicon - The Internet's Favorite Element: Crash Course Chemistry #35 In this episode we talk about Silicon Valley's namesake and how network solids are at the heart of it all. Hank also discusses Solid-State Semiconductors N-Type and P-Type Semiconductors Diodes Transistors Computer Chips and Binary Code. All from the same thing that makes up sand Pssst. we made flashcards to help you review the content in this episode Find them on the free Crash Course App Download it here for Apple Devices: https://apple.co/3d4eyZo Download it here for Android Devices: https://bit.ly/2SrDulJ -- Table of"
YouTube Link 2013-10-22T01:39Z 16.9M followers, 391.3K engagements
"Training Neural Networks: Crash Course AI #4 Today were going to talk about how neurons in a neural network learn by getting their math adjusted called backpropagation and how we can optimize networks by finding the best combinations of weights to minimize error. Then well send John Green Bot into the metaphorical jungle to find where this error is the smallest known as the global optimal solution compared to just where it is relatively small called local optimal solutions and we'll discuss some strategies we can use to help neural networks find these optimized solutions more quickly. Crash"
YouTube Link 2019-08-30T20:46Z 16.9M followers, 227.9K engagements
"The Cold War and Consumerism: Crash Course Computer Science #24 Today were going to step back from hardware and software and take a closer look at how the backdrop of the cold war and space race and the rise of consumerism and globalization brought us from huge expensive codebreaking machines in the 1940s to affordable handhelds and personal computers in the 1970s. This is an era that saw huge government funded projects - like the race to the moon. And afterward a shift towards the individual consumer commoditization of components and the rise of the Japanese electronics industry. Pre-order"
YouTube Link 2017-08-16T21:54Z 16.9M followers, 319.4K engagements
"Community Ecology II: Predators - Crash Course Ecology #5 Hank gets to the more violent part of community ecology by describing predation and the many ways prey organisms have developed to avoid it. TABLE OF CONTENTS Herbivory and Parasitism 1:43 Predatory Adaptation 3:39 Cryptic Coloration 4:25 Mullerian Mimicry 5:43 Batesian Mimicry 6:38 Resources: http://www.youtube.com/watchv=37hHBgaZymo&feature=fvwrel http://www.youtube.com/watchv=eGAeRWwQ2mA http://www.nature.com/scitable/knowledge/library/predation-herbivory-and-parasitism-13261134"
YouTube Link 2012-12-04T21:11Z 16.9M followers, 633.8K engagements
"How to Sell Anything: Crash Course Entrepreneurship #12 It can be hard to strike the right tone or know whats going to appeal to someone but there are tricks. We can craft a narrative and use well-placed emotional appeals to tell customers a story. Even if you dont consider yourself a persuasive person you dont need a +5 charisma modifier to succeed at this crucial stage of entrepreneurship. *** Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following patrons for their generous monthly contributions that help keep Crash"
YouTube Link 2019-11-06T22:30Z 16.9M followers, 167.1K engagements
"The First Home Consoles: Crash Course Games #5 So last week Andre talked about Ataris role in the rise of the video game industry but Atari wasnt the only major player in the 1970s. So were going to step back a few years and first talk about Ralph Baer who designed the first video game console - the Magnavox Odyssey. The Odyssey would go on to inspire the industry including of course Atari but also Mattel and many others. This was the start of the first console wars and with it we see huge improvements in graphics gameplay and of course better storytelling. But well also see a flooding of the"
YouTube Link 2016-05-07T00:13Z 16.9M followers, 349.3K engagements
"Probability Part 2: Updating Your Beliefs with Bayes: Crash Course Statistics #14 Today we're going to introduce bayesian statistics and discuss how this new approach to statistics has revolutionized the field from artificial intelligence and clinical trials to how your computer filters spam We'll also discuss the Law of Large Numbers and how we can use simulations to help us better understand the "rules" of our data even if we don't know the equations that define those rules. Want to try out the law of large numbers simulation yourself More details here:"
YouTube Link 2018-05-02T21:04Z 16.9M followers, 279.8K engagements
"More Stereochemical Relationships: Crash Course Organic Chemistry #9 Enantiomers have almost all the same chemical and physical properties so it can be tough to separate them. But its still super important that we know how to tell them apart In this episode of Crash Course Organic Chemistry well recap all the types of isomers weve learned about so far and also learn about polarimetry as a way to separate enantiomers and how to predict the number of stereoisomers a molecule will have. Episode Sources: THINK BIG Must the molecules of life always be Left-Handed or Right-Handed Smithsonian"
YouTube Link 2020-08-05T21:17Z 16.9M followers, 194.4K engagements
"Meiosis: Why Are All Humans Unique: Crash Course Biology #30 Ever wonder why we arent exact clones of our parents or why siblings arent exactly alike The reason traces back to meiosis. In this episode of Crash Course Biology well discover how egg and sperm cells get made and learn why youre a totally unique remix of your parents DNA. Introduction: Why Are We All Unique 0:00 Gametes 1:33 Meiosis 4:09 The Phases of Meiosis 4:44 Nondisjunction 7:14 Why We Aren't Clones 8:18 Meiosis & Genetic Diversity 9:49 Review & Credits 11:32 This series was produced in collaboration with HHMI BioInteractive"
YouTube Link 2024-02-13T17:00Z 16.9M followers, 340.5K engagements
"Why We Can Exist Crash Course Pods: The Universe #2 Head to https://policygenius.com/crashcourse to get your free life insurance quotes and see how much you could save. In Episode [--] of their journey through the history of the universe Dr. Katie Mack and John Green discuss the fundamental forces of nature the tiny ovens we know as particle colliders and how we all can exist. Chapters 00:00 - Introduction 3:17 - Particle colliders 5:45 - Protons 14:00 - The Fundamental Forces 20:33 - The Theory of Everything 27:12 - The Higgs Field 34:46 - It's Incredible That We Know This Stuff *** Crash"
YouTube Link 2024-05-08T15:00Z 16.9M followers, 133.4K engagements
"Atari and the Business of Video Games: Crash Course Games #4 Today Andre is going to talk about the rise of Atari and with it the rise of the video game industry. So if you remember from last episode we mentioned that the first arcade machine Galaxy Game happened to have a coin slot but this was just the beginning. Nolan Bushnell often considered the Father of the Video Game Industry saw the opportunity for the commercialization of video games. Bushnell founded Atari and oversaw the development of its first game - Pong. And then through some questionably ethical business strategies Bushnell"
YouTube Link 2016-04-22T23:56Z 16.9M followers, 400.3K engagements
"Advanced CPU Designs: Crash Course Computer Science #9 So now that weve built and programmed our very own CPU were going to take a step back and look at how CPU speeds have rapidly increased from just a few cycles per second to gigahertz Some of that improvement of course has come from faster and more efficient transistors but a number hardware designs have been implemented to boost performance. And youve probably heard or read about a lot of these - theyre the buzz words attached to just about every new CPU release - terms like instruction pipelining cache FLOPS superscalar branch prediction"
YouTube Link 2017-04-27T00:39Z 16.9M followers, 1M engagements
"Foreign Aid and Remittance: Crash Course Economics #34 What is foreign aid How much foreign aid does the United States distribute each year. Comparatively not much. In fact foreign aid only accounts for a small fraction of most nations' overall spending. But it's hugely important. Foreign aid improves healthcare can promote economic growth and assists people who've been through disasters. Remittances are moneys that are sent internationally by immigrants. People move internationally to *** Crash Course is on Patreon You can support us directly by signing up at"
YouTube Link 2016-05-27T22:38Z 16.9M followers, 410.9K engagements
"Types of Bureaucracies: Crash Course Government and Politics #16 In which Craig Benzine breaks down the different types of bureaucracies. I mean sure theyre all part of the executive branch but some work more directly with the President than others. Some bureaucracies exist solely to independently regulate industry whereas others are expected to operate like corporations and make a profit. And on top of all that some of these agencies have sub-agencies It can all get pretty complicated so well try to discuss some of the most significant agencies out there and the ones you hear a lot about on"
YouTube Link 2015-05-15T22:28Z 16.9M followers, 950.5K engagements
"The Milky Way: Crash Course Astronomy #37 Today were talking about our galactic neighborhood: The Milky Way. Its a disk galaxy a collection of dust gas and hundreds of billions of stars with the Sun located about halfway out from the center. The disk has grand spiral patterns formed by the traffic jams of stars and nebulae where stars are born. The central region is shaped like a bar and is mostly old red stars. Theres also a halo surrounding us of old stars. Check out the Crash Course Astronomy solar system poster here: http://store.dftba.com/products/crashcourse-astronomy-poster --"
YouTube Link 2015-10-22T21:00Z 16.9M followers, 1.5M engagements
"War & Expansion: Crash Course US History #17 In which John Green teaches you about the Mexican-American War in the late 1840s and the expansion of the United States into the western end of North America. In this episode of Crash Course US territory finally reaches from the Atlantic coast to the Pacific Ocean. After Oregon was secured from the UK and the southwest was ceded by Mexico that is. Famous Americans abound in this episode including James K Polk (Young Hickory Napoleon of the Stump) Martin Van Buren Zachary Taylor and Winfield Scott. You'll also learn about the California Gold Rush of"
YouTube Link 2013-06-06T22:32Z 16.9M followers, 3.9M engagements
"The Physics of Heat: Crash Course Physics #22 Have you ever wondered why we wear clothes I mean beyond the obvious. Why does wearing a jacket in the cold keep you warmer What is happening to all the heat inside your body In this episode of Crash Course Physics Shini talks about the physics of heat -- Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios -- Want to find Crash Course elsewhere on the internet Facebook - http://www.facebook.com/YouTubeCrashC. Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support"
YouTube Link 2016-09-08T23:17Z 16.9M followers, 882.2K engagements
"Schizophrenia and Dissociative Disorders: Crash Course Psychology #32 In this episode of Crash Course Psychology Hank describes some of the most misunderstood psychological disorders out there: Schizophrenia and Dissociative Identity Disorder. Want more videos about psychology Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych -- Chapters: Introduction: Schizophrenia & Dissociative Disorders 00:00 Schizophrenia Spectrum Disorders 1:31 Psychotic Symptoms 5:04 Physiological Brain Abnormalities in Schizophrenic Patients 5:43 Diathesis Stress Model 6:49"
YouTube Link 2014-09-29T23:41Z 16.9M followers, 5.2M engagements
"Intro to Big Data: Crash Course Statistics #38 Today we're going to begin our discussion of Big Data. Everything from which videos we click (and how long we watch them) on YouTube to our likes on Facebook say a lot about us - and increasingly more and more sophisticated algorithms are being designed to learn about us from our clicks and not-clicks. Today we're going to focus on some ways Big Data impacts on our lives from what liking Hello Kitty says about us to how Netflix chooses just the right thumbnail to encourage us to watch more content. And Big Data is necessarily a good thing next"
YouTube Link 2018-11-14T22:00Z 16.9M followers, 215K engagements
"If One Finger Brought Oil - Things Fall Apart Part 1: Crash Course Literature [---] In which John Green teaches you about Chinua Achebe's [----] novel Things Fall Apart. You'll learn about Igboland a region in modern-day Nigeria prior to the arrival of the British Empire. Achebe tells the story of Okonkwo an Igbo villager who has worked his way up from life as a sharecropped and become a respected leader in his community. Okonkwo has a tragic fall and is exiled. And then the trouble starts. British missionaries arrive and change everything. Things Fall Apart has a lot to say about colonization"
YouTube Link 2014-04-17T21:07Z 16.9M followers, 1.5M engagements
"Divine Command Theory: Crash Course Philosophy #33 As we venture into the world of ethics there are a lot of different answers to the grounding problem for us to explore. One of the oldest and most popular is the divine command theory. But with age comes a long history of questions too such as the dilemma presented by Plato known as the Euthyphro Problem. -- All other images and video either public domain or via VideoBlocks or Wikimedia Commons licensed under Creative Commons BY 4.0: https://creativecommons.org/licenses/by/4.0/ -- Produced in collaboration with PBS Digital Studios:"
YouTube Link 2016-10-31T21:07Z 16.9M followers, 1.5M engagements
"The Scientific Method: Crash Course Biology #2 Science offers a way of discovering and understanding the world around us driven by questions and tested with evidence. And its a twisty-turny team effort you wont find many lone geniuses out there or straight lines from hypothesis to conclusion. In this episode of Crash Course Biology well talk about the big picture of how scientific progress is made from peer review to mathematical models with some exploding eggs along the way. Chapters: Introduction to Science 00:00 The Scientific Method 2:25 Science is a Team Effort 5:18 The Scientific Theory"
YouTube Link 2023-06-13T16:00Z 16.9M followers, 582.5K engagements
"The New Astronomy: Crash Course History of Science #13 This week on Crash Course: History of the Scientific Revolutionastronomical anomalies accrued. Meanwhile in Denmarkan eccentric rich dude constructed not one but two science castles And his humble German assistant synthesized a lot of new old and bold astronomical ideas into a single sun-centered eccentricity-positive system *** Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free"
YouTube Link 2018-07-09T22:19Z 16.9M followers, 496.3K engagements
"ATP & Respiration: Crash Course Biology #7 In which Hank does some push-ups for science and describes the "economy" of cellular respiration and the various processes whereby our bodies create energy in the form of ATP. Special thanks go to Stafford Fitness (www.staffordfitness.net) for allowing us to shoot the gym scenes in their facilities. This video uses sounds from Freesound.org Table of Contents: 1) Cellular Respiration 01:00 2) Adenosine Triphosphate 01:29 3) Glycolysis 4:13 A) Pyruvate Molecules 5:00 B) Anaerobic Respiration/Fermentation 5:33 C) Aerobic Respiration 6:45 4) Krebs Cycle"
YouTube Link 2012-03-12T22:18Z 16.9M followers, 11.5M engagements
"The Protestant Reformation: Crash Course European History #6 You may have noticed that the internet is terrible at religious discourse. Well this is not a new phenomenon. In the early 16th century the Roman Catholic church dominated Christianity in Europe and the institution was starting to show some cracks. Tensions mounted and protests grew and eventually the Protestant Reformation happened. Martin Luther nailed his [--] Theses to the church door in Wittenberg but the Reformation doesn't exactly begin with Luther and it certainly doesn't end with him. Today we're looking at how and why the"
YouTube Link 2019-05-18T20:02Z 16.9M followers, 1.9M engagements
"International IP Law: Crash Course Intellectual Property #6 This week Stan Muller teaches you how intellectual property law functions internationally. Like between countries. Well guess what. There's kind of no such thing as international law. But we can talk about treaties. There is a bevy of international treaties that regulate how countries deal with each others' IP. The upside is that this cooperation tends to foster international trade. The downside is that these treaties tend to stifle creativity by making it harder to shorten copyright terms. You win some you lose some. Crash Course is"
YouTube Link 2015-06-03T23:51Z 16.9M followers, 240K engagements
"The Bobo Beatdown: Crash Course Psychology #12 In this episode of Crash Course Psychology Hank talks about how we learn by observation. and how that can mean beating up an inanimate clown named Bobo. Want more videos about psychology Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych -- Chapters: Introduction: The Bobo Doll Experiment 00:00 Social Cognitive Learning 1:05 Limitations of Classical & Operant Conditioning 1:58 Learning Associations 2:38 Learning & Cognition 4:06 Latent Learning 4:58 Observational Learning Modeling & Imitation 5:36 Reward Pathways &"
YouTube Link 2014-04-28T22:16Z 16.9M followers, 3.3M engagements
"The Native Civil Rights Movement: Ep [--] of Crash Course Native American History Were in our self-determination era In this episode of Crash Course Native American History well explore the activism that led to the biggest change in modern federal Indian policy and how it affects Native nations today. Introduction: Alcatraz 00:00 Indians of All Tribes 0:36 The Self-determination Era 1:56 Effects of Self-determination 3:58 The Indian Child Welfare Act 6:37 Problems with Self-determination 7:23 Self-determination Today 8:55 Review & Credits 9:49 Sources:"
YouTube Link 2025-09-09T16:00Z 16.9M followers, 60.9K engagements
"Horror in Latin American literature: Crash Course Latin American Literature #6 Are you afraid of ghosts In this episode of Crash Course Latin American Literature we pull back the curtain on the origins of Latin American horror winding our way through (literal) ghost towns haunted inns and the eerie landscape of the Andes. Prepare to be spooked. Introduction: A Ghost Story 00:00 Ghosts in Latin America 0:37 Pedro Pramo 1:22 The Female Gothic 4:54 Andean Gothic 6:51 The New Boom 8:25 Review and Credits 9:16 Sources:"
YouTube Link 2025-12-11T17:00Z 16.9M followers, 24.1K engagements
"Luther and the Protestant Reformation: Crash Course World History #218 In which John Green teaches you about the Protestant Reformation. Prior to the Protestant Reformation pretty much everyone in Europe was a Roman Catholic. Not to get all "great man" but Martin Luther changed all that. Martin Luther didn't like the corruption he saw in the church especially the sale of indulgences so he left the church and started his own. And it caught on And it really did kind of change the world. The changes increased literacy and education and some even say the Protestant Reformation was the beginning"
YouTube Link 2014-11-29T21:02Z 16.9M followers, 6.2M engagements
"Operating Systems: Crash Course Computer Science #18 Get 10% off a custom domain and email address by going tohttps://www.hover.com/CrashCourse. So as you may have noticed from last episode computers keep getting faster and faster and by the start of the 1950s they had gotten so fast that it often took longer to manually load programs via punch cards than to actually run them The solution was the operating system (or OS) which is just a program with special privileges that allows it to run and manage other programs. So today were going to trace the development of operating systems from the"
YouTube Link 2017-06-28T21:13Z 16.9M followers, 1.8M engagements
"Lost in Translation: Crash Course Film Criticism #7 It's time to take a look at a quieter sweeter and maybe happier film in this series. Sophia Coppola's "Lost in Translation" is a wonderful romantic comedy that doesn't play by the usual rules of its genre. In this episode Michael talks to us about how the film works as well as why the film works so well. Also does it critique Capitalism It might Strap in *** Check out all [--] films we'll be talking about below Citizen Kane Aliens Where Are My Children Selma In the Mood For Love Do the Right Thing Lost In Translation Apocalypse Now Pan's"
YouTube Link 2018-03-01T22:02Z 16.9M followers, 357.2K engagements
"Election Basics: Crash Course Government and Politics #36 This week Craig is going to give you a broad overview of elections in the United States. So as you may have noticed there are kind of a lot of people in the U.S and holding individual issues up to a public vote doesn't seem particularly plausible. So to deal with this complexity we vote for people not policies that represent our best interests. But as you'll see this process was not thoroughly addressed in the Constitution so there have been a number of amendments and laws at the state level implemented to create the election system we"
YouTube Link 2015-10-23T21:32Z 16.9M followers, 1.3M engagements
"Emmett Till: Crash Course Black American History #34 In [----] a 14-year-old boy named Emmett Till was brutally murdered in Money Mississippi. The white men who murdered him killed him for being Black. Emmett Till's mother chose to have an open casket funeral and show the world what had been done to her son. Despite the killers being acquitted in court the story of Emmett Till and the jarring images of his funeral shocked the nation and were a vital catalyst in turning the civil rights movement into a nationwide phenomenon. Clint's book How the Word is Passed is available now"
YouTube Link 2022-03-12T17:28Z 16.9M followers, 351.7K engagements
"Emotion Stress and Health: Crash Course Psychology #26 So it turns out we have an easy time reading emotions in facial expressions but emotions can straight up kill us In this episode of Crash Course Psychology Hank discusses stress emotions and their overall impact on our health. Want more videos about psychology Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych -- Chapters: Introduction: How Emotions Work 00:00 Facial Expressions 1:24 Expressing Emotions 2:18 How Many Emotions Are There 2:57 Two-Dimensional Model of Emotional Experience 3:29 Defining Stress"
YouTube Link 2014-08-12T02:26Z 16.9M followers, 3.5M engagements
"The Singularity Skynet and the Future of Computing: Crash Course Computer Science #40 In our SERIES FINALE of Crash Course Computer Science we take a look towards the future In the past [--] years electronic computing has fundamentally changed how we live our lives and we believe its just getting started. From ubiquitous computing artificial intelligence and self-driving cars to brain computer interfaces wearable computers and maybe even the singularity there is so much amazing potential on the horizon. Of course there is also room for peril with the rise of artificial intelligence and more"
YouTube Link 2017-12-21T17:01Z 16.9M followers, 358.6K engagements
"5 Human Impacts on the Environment: Crash Course Ecology #10 Hank gives the rundown on the top five ways humans are negatively impacting the environment and having detrimental effects on the valuable ecosystem services which a healthy biosphere provides. Table of Contents Ecosystem Services 00:51 The Importance of Biodiversity 04:07 Deforestation 06:42 Desertification 06:49 Global Warming 07:59 Invasive Species 08:51 Overharvesting 09:20 Crash Course/SciShow videos referenced in this episode: Hydrologic and Carbon Cycles: http://www.youtube.com/watchv=2D7hZpIYlCA Nitrogen and Phosphorus"
YouTube Link 2013-01-08T01:14Z 16.9M followers, 2.8M engagements
"How Presidents Govern: Crash Course Government and Politics #14 This week Craig Benzine talks about how the President gets things done. Filling the role of the Executive Branch is a pretty big job - much too big for just one person. It's so big that the President employs an entire federal bureaucracy Today were just going to focus on those closest to the President like the Vice President the Cabinet and the Executive Office of the President. Well figure out which strategy is most useful in helping the President make things happen and well discuss the controversy around the Presidents gradual"
YouTube Link 2015-05-01T23:49Z 16.9M followers, 1.2M engagements
"How a Bill Becomes a Law: Crash Course Government and Politics #9 Oh my Craig has his work cut out for him this week. The process of how a bill becomes a law can be pretty complex fraught with potential bill-death at every corner. As if just getting through committee isnt difficult enough bills have to navigate a series of amendments and votes in both houses potentially more committees further compromise bills and even more floor votes just to end up on the chopping block of the President. And then in one fell swoop the President can stop a bill in its tracks with a veto But then again a"
YouTube Link 2015-03-20T23:03Z 16.9M followers, 2.6M engagements
"Translation: How RNA Gets Translated into Protein Power: Crash Course Biology #35 How does the information from mRNA turn into a protein It all comes down to translation where nucleotides are translated into a chain of amino acids. In this episode of Crash Course Biology well cover codon-reading ribosomes tRNA delivery trucks and scientists who are using what they know about translation to save lives. Introduction: Making Proteins 00:00 DNA & mRNA 1:13 How Translation Works 2:16 Peptides & Polypeptides 6:43 Why Proteins Matter 7:07 Dr. Katalin Karik 9:26 Review & Credits 11:37 This series was"
YouTube Link 2024-03-19T16:00Z 16.9M followers, 285.2K engagements
"What Are Rocks and How Do They Form Crash Course Geography #18 From towering mountains to pebbles along a river the Earth is made of a huge variety of rocks. In today's episode we're going to follow the rock cycle of a piece of granite in the Himalayan mountains and as you'll see every rock has a far-reaching story to tell often millions of years in the making. Watch our videos and review your learning with the Crash Course App Download here for Apple Devices: https://apple.co/3d4eyZo Download here for Android Devices: https://bit.ly/2SrDulJ Crash Course is on Patreon You can support us"
YouTube Link 2021-06-28T21:39Z 16.9M followers, 1.4M engagements
"Crash Course Writing Workshop Editorial Director Meghan Modafferi and Script Editor Annie Fillenwarth take you behind the scenes into the life cycle of a Crash Course script as it develops from a seed of an idea into a heavily-researched edited fact-checked and fun-ified piece of writing. Learn how to make nonfiction writing engaging clear and story-oriented and avoid common pitfalls along the way. Learn more about the Learn-a-thon at http://complexlylearnathon.com"
YouTube Link 2025-11-03T08:19Z 16.9M followers, 17.1K engagements
"The Land Back Movement Explained: Ep [--] of Crash Course Native American History The Land Back movement is exactly what it sounds like: Native Americans want their land back. But its also a whole lot more than that. In this episode of Crash Course Native American History we explore what the Land Back movement does how it works and what it means for our shared future on this planet. Introduction: [----] Land Back Lane 00:00 Land Back & Land Acknowledgements 0:40 Settler Rent 2:00 The Jemez Pueblo Tribe 3:17 Environmental Impact 4:14 Haudenosaunee Activism 7:04 Review & Credits 9:26 Sources:"
YouTube Link 2025-11-11T17:00Z 16.9M followers, 53.1K engagements
"Newtonian Gravity: Crash Course Physics #8 I'm sure you've all heard about Isaac Newton and that apple that fell on his head and how that was a huge deal to our understanding of gravity. Well. let's talk about that. In this episode of Crash Course Physics Shini sits down to talk about the realities of the apple story and how Newtonian Gravity is more than a little important. *** Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse -- Want to find Crash"
YouTube Link 2016-05-19T19:56Z 16.9M followers, 1.4M engagements
"The Growth of Knowledge: Crash Course Psychology #18 How does our knowledge grow It turns out there are some different ideas about that. Schemas Four-Stage Theory of Cognitive Development and Vygotsky's Theory of Scaffolding all play different roles but the basic idea is that children think about things very differently than adults. Hank explains in today's episode of Crash Course Psychology. Want more videos about psychology Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych -- Chapters: Introduction: Cognitive Development 00:00 Maturation 1:23 Jean Piaget's"
YouTube Link 2014-06-09T23:39Z 16.9M followers, 3.1M engagements
"The Dred Scott Decision: Crash Course Black American History #16 In this video we'll learn about the US Supreme Court decision in Scott vs Sanford handed down in [----]. The case ultimately rejected the idea that Black people could be citizens of the United States and this helped entrench the institution of slavery denied a host of rights to a huge number of people (both enslaved and free) and increased the tensions between abolitionists and enslavers. Clint's book How the Word is Passed is available now https://bookshop.org/a/3859/9780316492935 VIDEO SOURCES"
YouTube Link 2021-09-04T16:59Z 16.9M followers, 566.3K engagements
"Genetic Traits: Nature Nurture Not That Simple: Crash Course Biology #32 Its not nature versus nurtureits both In this episode of Crash Course Biology well explore how complex interactions between genes and the environment shape all sorts of traits from human skin color to honeybees royal jelly. Chapters: Nature vs. Nurture 00:00 Polygenic Traits 1:24 Complex Traits 3:31 Epigenetics & Dr. Folami Ideraabdullah 7:11 Heritability 9:14 Phenotypic Plasticity 10:10 Review & Credits 11:22 This series was produced in collaboration with HHMI BioInteractive committed to empowering educators and"
YouTube Link 2024-02-27T17:00Z 16.9M followers, 130.2K engagements
"The Internet: Crash Course Computer Science #29 Today we're going to talk about how the Internet works. Specifically how that stream of characters you punch into your browser's address bar like "youtube.com" return this very website. Just to clarify we're talking in a broader sense about that massive network of networks connecting millions of computers together not just the World Wide Web which is a portion of the Internet and our topic for next week. Today we're going to focus on how data is passed back and forth - how a domain name is registered by the Domain Name System and of course how"
YouTube Link 2017-09-20T21:47Z 16.9M followers, 900.5K engagements
"Water & Solutions - for Dirty Laundry: Crash Course Chemistry #7 Dihydrogen monoxide (better known as water) is the key to nearly everything. It falls from the sky makes up 60% of our bodies and just about every chemical process related to life takes place with it or in it. Without it none of the chemical reactions that keep us alive would happen - none of the reactions that sustain any life form on earth would happen - and the majority of inorganic chemical reactions that shape the surface of the earth would not happen either. Every one of us uses water for all kinds of chemistry every day -"
YouTube Link 2013-03-26T02:51Z 16.9M followers, 2.3M engagements
"Moon Phases: Crash Course Astronomy #4 In this episode of Crash Course Astronomy Phil takes you through the cause and name of the Moon's phases. Check out the Crash Course Astronomy solar system poster here: http://store.dftba.com/products/crashcourse-astronomy-poster -- Chapters: Why does the Moon Have Phases 00:00 New Moon 2:26 Waxing Crescent 4:17 First Quarter 4:35 Waxing Gibbous 5:15 Full Moon 5:32 Waning Gibbous Third Quarter and Waning Crescent 6:26 Earthshine 7:20 Review 8:58 -- PBS Digital Studios: http://youtube.com/pbsdigitalstudios Follow Phil on Twitter:"
YouTube Link 2015-02-05T22:00Z 16.9M followers, 4.1M engagements
"Shirley Chisholm: Crash Course Black American History #43 In [----] Shirley Chisholm ran for president of the United States of America as a Democrat. She didn't win but this was not the beginning or the end of her career in politics. She held a congressional seat in the New York delegation for decades and Shirley was a pioneer on many fronts. Today we'll learn about her life her career and her legacy. Clint's book How the Word is Passed is available now https://bookshop.org/books/how-the-word-is-passed-a-reckoning-with-the-history-of-slavery-across-america/9780316492935 SOURCES Shirley Chisholm"
YouTube Link 2022-07-27T21:56Z 16.9M followers, 118.4K engagements
"Economic Systems and Macroeconomics: Crash Course Economics #3 In which Jacob Clifford and Adriene Hill teach you about Economic Systems and Macroeconomics. So economics is basically about choices. We'll look at some of the broadest economic choices when we talk about the difference between planned economies and market economies. We'll get into communism socialism command economies and capitalism. We'll look at how countries choose the kind of system they're going to use (spoiler alert: many end up with mixed economies). We'll also look into how individuals make economic choices. Crash Course"
YouTube Link 2015-07-30T18:40Z 16.9M followers, 4.4M engagements
"E/Z Alkenes Electrophilic Addition & Carbocations: Crash Course Organic Chemistry #14 Alkenes are an important type of molecule in organic chemistry that were going to see a lot more of in this series. But before we can really get into the many cool reactions alkenes do we need to go over some of the basics. In this episode of Crash Course Organic Chemistry well review and build on our knowledge of alkene nomenclature revisit our friend the carbocation and learn Markovnikovs Rule: an important tool that will help us predict the products of addition reactions involving alkenes. Series Sources:"
YouTube Link 2020-10-14T18:00Z 16.9M followers, 220.7K engagements
"Distances: Crash Course Astronomy #25 How do astronomers make sense of the vastness of space How do they study things so far away Today Phil talks about distances going back to early astronomy. Ancient Greeks were able to find the size of the Earth and from that the distance to and the sizes of the Moon and Sun. Once the Earth/Sun distance was found parallax was used to find the distance to nearby stars and that was bootstrapped using brightness to determine the distances to much farther stars. Check out the Crash Course Astronomy solar system poster here:"
YouTube Link 2015-07-17T00:00Z 16.9M followers, 2.1M engagements
"Degrees of Freedom and Effect Sizes: Crash Course Statistics #28 Today we're going to talk about degrees of freedom - which are the number of independent pieces of information that make up our models. More degrees of freedom typically mean more concrete results. But something that is statistically significant isn't always practically significant. And to measure that we'll introduce another new concept - effect size. Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following Patrons for their generous monthly contributions"
YouTube Link 2018-08-22T20:47Z 16.9M followers, 212K engagements
"The Norse Pantheon: Crash Course World Mythology #10 This week we're headed north. To check out the gods of the Northmen. Or the Norse. That's right we're talking Thor Loki Freyr Freya Odin Frigg Baldr and Tyr. And Fenrir. And the Frost Giants. There's a lot to cover here and it's going to be fun. Watch this prior to Ragnarok as this video probably won't be available after the end of the universe. Crash Course is made with Adobe Creative Cloud. Try it for free here: http://www.adobe.com/creativecloud/start-with-free-creativecloud.html Our Sources: Kevin Crossley-Holland the Norse Myths."
YouTube Link 2017-04-30T22:18Z 16.9M followers, 1.6M engagements
"A History of Indigenous Women with Lily Gladstone: Ep [--] of Crash Course Native American History Women have always played important roles in Native societies. In this episode of Crash Course Native American History Lily Gladstone helps us unpack the ways Native women have shown up as war heroes and peacemakers and as matriarchs and activists. Introduction: Divine Women 00:00 Matriarchal Societies 0:37 Native Women at War 2:01 Jikonsaseh 3:05 Ideas about Gender 4:48 Effects of Colonization 5:53 Violence Against Women Today 8:08 Native Activism 9:24 Review & Credits 12:42 Special thanks to "100"
YouTube Link 2025-10-14T16:00Z 16.9M followers, 117.3K engagements
"Money and Finance: Crash Course Economics #11 So we've been putting off a kind of basic question here. What is money What is currency How are the two different. Well not to give away too much but money has a few basic functions. It acts as a store of value a medium of exchange and as a unit of account. Money isn't just bills and coins. It can be anything that meets these three criteria. In US prisons apparently pouches of Mackerel are currency. Yes mackerel the fish. Paper and coins work as money because they're backed by the government which is an advantage over mackerel. So once you've got"
YouTube Link 2015-10-14T16:01Z 16.9M followers, 1.9M engagements
"The Northern Renaissance: Crash Course European History #3 The European Renaissance may have started in Florence but it pretty quickly moved out of Italy and spread the art architecture literature and humanism across Europe to places like France Spain England and the Low Countries. SOURCES: Hunt Lynn et al. The Making of the West: Peoples and Cultures 6th ed. Boston: Bedford St. Martins [----]. Jardine Lisa. Erasmus Man of Letters. Princeton: Princeton University Press [----]. Donald R. Kelley Renaissance Humanism. Boston: Twayne [----]. Crash Course is on Patreon You can support us directly by"
YouTube Link 2019-04-26T23:53Z 16.9M followers, 1.5M engagements
"Cyclohexanes: Crash Course Organic Chemistry #7 Hexagons appear all over the natural world from honeycomb to bubbles and they even appear in organic chemistry In this episode of Crash Course Organic Chemistry we're learning all about cyclohexanes including how rings pucker to relieve strain the boat and chair conformations and how ring flips can switch substituents from axial to equatorial. We'll practice a lot of chair flips but don't flip an actual chair just yet Lots of practice is key to understanding organic chemistry's favorite manifestation of the hexagon. Episode Sources: Philip Ball"
YouTube Link 2020-07-08T21:00Z 16.9M followers, 240.6K engagements
"Social Mobility: Crash Course Sociology #26 Today were exploring social mobility in some more depth. Well look at intergenerational and intragenerational mobility and the difference between absolute and relative mobility. Well go over the long run upward social mobility trends in the United States as well as recent declines in absolute social mobility. Well also explore how opportunities for social mobility differ by class race and gender. Crash Course is made with Adobe Creative Cloud. Get a free trial here: https://www.adobe.com/creativecloud.html Crash Course is on Patreon You can support"
YouTube Link 2017-09-25T20:01Z 16.9M followers, 412.4K engagements
"Check Yourself with Lateral Reading: Crash Course Navigating Digital Information #3 Look to your left. Look to your right. Look at this video. Today John Green is going to teach you how to read laterally using multiple tabs in your browser to look stuff up and fact check as you read. Real-time fact-checking an help you figure out what's real and what's not on the internet. Special thanks to our partners from MediaWise who helped create this series: The Poynter Institute The Stanford History Education Group (sheg.stanford.edu) Follow MediaWise and their fact-checking work across social:"
YouTube Link 2019-01-23T00:08Z 16.9M followers, 1M engagements
"P-Hacking: Crash Course Statistics #30 Today we're going to talk about p-hacking (also called data dredging or data fishing). P-hacking is when data is analyzed to find patterns that produce statistically significant results even if there really isn't an underlying effect and it has become a huge problem in science since many scientific theories rely on p-values as proof of their existence Today we're going to talk about a few ways researchers have "hacked" their data and give you some tips for identifying and avoiding these types of problems when you encounter stats in your own lives. XKCD's"
YouTube Link 2018-09-05T21:03Z 16.9M followers, 160.1K engagements
"Community Ecology: Feel the Love - Crash Course Ecology #4 Interactions between species are what define ecological communities and community ecology studies these interactions anywhere they take place. Although interspecies interactions are mostly competitive competition is pretty dangerous so a lot of interactions are actually about side-stepping direct competition and instead finding ways to divvy up resources to let species get along. Feel the love Table of Contents 1) Competitive Exclusion Principle 2:02 2) Fundamental vs. Realized Niche 3:48 3) Eco-lography / Resource Partitioning 5:25"
YouTube Link 2012-11-26T22:33Z 16.9M followers, 1.2M engagements
"World War II A War for Resources: Crash Course World History #220 In which John Green teaches you about World War II and some of the causes behind the war. In a lot of ways WWII was about resources especially food. The expansionist aggression of both Germany and Japan was in a lot of ways about resources. There were other reasons to be sure but the idea that the Axis needed more food can't be ignored. Citation 1: Lizzie Collingham. The Taste of War: World War II and the Battle for Food. Penguin. New York. [----]. p [--] Citation 2: Collingham. p [---] --- Learn more about WWII in these other Crash"
YouTube Link 2014-12-14T23:34Z 16.9M followers, 2.9M engagements
"A Brief History of the Universe: Crash Course Astronomy #44 Thanks to the wonders of physics astronomers can map a timeline of the universes history. Today Phils going to give you an overview of those first few minutes (yes MINUTES) of the universes life. It started with the Big Bang when the Universe was incredibly dense and hot. It expanded and cooled going through multiple stages where different kinds of matter could form. It underwent a phenomenally rapid expansion called inflation which smoothed out much of the lumpiness in the matter. Normal matter formed atoms between [--] and [--] minutes"
YouTube Link 2016-01-07T22:00Z 16.9M followers, 1.2M engagements
"World War I Battlefields: Crash Course European History #33 Europe's system of alliances and centuries-old tensions erupted into war in August of [----]. This week on Crash Course Euro we're talking about the military history of World War I and taking a look at the broad strokes of how the war unfolded. We'll take you from the guns of August through gruesome battles like Verdun and the Somme and follow the thread all the way through to the Armistice in [----]. It didn't turn out to be the War to End All Wars sadly but there is a lot to learn from it. Sources -Engelstein Laura. Russia in Flames."
YouTube Link 2020-01-23T21:22Z 16.9M followers, 880.5K engagements
"African Pantheons and the Orishas: Crash Course World Mythology #11 So today were talking about African Pantheons. Now you might say thats ridiculous. Africa isnt a single place with a single pantheon and wed be fools to try and cover all that in an eleven minute video. Youd be right. Instead were going to focus on Yoruba religion from west Africa and the Orishas that populate Yoruba stories. The many many Orishas cover all aspects of life and can be pretty specialized. Were going to focus on a dozen or so. Crash Course is on Patreon You can support us directly by signing up at"
YouTube Link 2017-05-12T23:34Z 16.9M followers, 1.4M engagements
"Confucianism Buddhism and Daoism: Chinese Popular Religion A large proportion of Chinese people believe in a godyet most report they dont belong to any religion. In this episode of Crash Course Religions well learn about two of the Three Teachings of ChinaConfucianism and Daoismand explore why Chinese religious practice is much more fluid than the question What religion do you follow Introduction: A Ghostly Unboxing 00:00 The Ghost Festival 1:29 Religion in China 2:43 Confucianism 4:02 Daoism 7:39 Chinese Popular Religion 10:47 Review & Credits 11:44"
YouTube Link 2024-11-26T17:00Z 16.9M followers, 258.2K engagements
"German Expressionism: Crash Course Film History #7 We've spent a lot of time focusing on France and the U.S. as that's where a significant amount of both infrastructure and business models were initially set up for film. But there were other countries adding their own stories to the annals of film history. In this episode of Crash Course Film History we're going to focus on Germany and how they got a bit expressive with film. Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios Want to know more about Craig https://www.youtube.com/user/wheezywaiter The"
YouTube Link 2017-05-26T00:00Z 16.9M followers, 569.1K engagements
"What Are Ecosystems Crash Course Geography #15 Today we're going to take a closer look at ecosystems -- which are communities of living organisms in an area interacting with their environment -- and how this relationship between the amount of energy a place receives and the movement of nutrients is what makes the incredible diversity of life possible. We'll also take a look at the patterns we see in the main global biomes show you why some biomes (like tropical rainforests) are so productive and discuss an agricultural practice some farmers have employed to help preserve their local"
YouTube Link 2021-05-18T19:11Z 16.9M followers, 478K engagements
"Italian and German Unification: Crash Course European History #27 So we haven't talked much about Italy and Germany so far in Crash Course Euro and that's because prior to the mid-19th century those two nation-states weren't really a thing. Today we'll look at how Italy and Germany pulled it together in the second half of the 1800s. You'll learn about Guisseppe Garibaldi Victor Emmanuelle Otto von Bismarck Wilhelm I and a whole heck of a lot about the development of modern politics. Sources -Hunt Lynn. The Making of the West: Peoples and Cultures. 6th ed. Boston: Bedford St. Martins 2019."
YouTube Link 2019-11-27T00:21Z 16.9M followers, 1.5M engagements
"Nuclear Chemistry: Crash Course Chemistry #38 In this episode Hank welcomes you to the new age to the new age welcome to the new age. Here he'll talk about transmutation among elements isotopes calculating half-life radioactive decay and spontaneous fission. Pssst. we made flashcards to help you review the content in this episode Find them on the free Crash Course App Download it here for Apple Devices: https://apple.co/3d4eyZo Download it here for Android Devices: https://bit.ly/2SrDulJ -- Table of Contents Radioactivity Transmutation Among Elements and Isotopes Calculating Half-Life"
YouTube Link 2013-11-11T18:29Z 16.9M followers, 2.2M engagements
"Tides: Crash Course Astronomy #8 Today Phil explores the world of tides What is the relationship between tides and gravity How do planets and their moons become tidally locked What would happen if you were 300km tall Important questions. Check out the Crash Course Astronomy solar system poster here: http://store.dftba.com/products/crashcourse-astronomy-poster -- Chapters: Introduction 00:00 Gravity Over Distance 0:44 Tidal Force Parameters 1:35 Battle of the Bulges 2:55 High and Low Tides 3:47 Push & Pull 4:51 Tidal Lock 6:07 Sun Tides 6:58 Review 8:51 -- PBS Digital Studios:"
YouTube Link 2015-03-05T22:00Z 16.9M followers, 2M engagements
"The Structure & Cost of US Health Care: Crash Course Sociology #44 In our final episode of Crash Course Sociology we are going to talk about what the health care system in the US looks like the five As of health care accessibility and a couple of contributing factors to the affordability of health care: fee for service care and the structure of our health insurance system which encourage higher spending. Thanks everybody for joining us for the past year on Crash Course Sociology Crash Course is made with Adobe Creative Cloud. Get a free trial here:"
YouTube Link 2018-02-12T22:03Z 16.9M followers, 352.3K engagements
"Mitosis: Splitting Up is Complicated - Crash Course Biology #12 Hank describes mitosis and cytokinesis - the series of processes our cells go through to divide into two identical copies. References: http://www.eurekalert.org/pub_releases/2012-02/wifb-amm020812.php http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files/bio%20101/bio%20101%20lectures/mitosis/mitosis.htm http://www.genome.gov/Images/press_photos/highres/97-300.jpg http://www.nature.com/nrm/journal/v2/n1/fig_tab/nrm0101_072a_F1.html https://www.genome.gov/Glossary/index.cfmp=viewimage&id=33"
YouTube Link 2012-04-16T21:22Z 16.9M followers, 7.2M engagements
"How to Pay for College Crash Course How to College You're already learning on YouTube why not get college credit for it https://link.gostudyhall.com/my1 Paying for college is stressful and there's a lot of research we need to do. So we want to be methodical and patient and make sure we know what all of our options are. So in this episode Erica walks us through how to know our options what steps to take to get the funding you need to be successful in college. *** Now you can take top-tier college courses with Study Hall Study Hall videos are available to watch at no cost and first-year courses"
YouTube Link 2022-04-22T19:00Z 16.9M followers, 304.9K engagements
"Migration: Crash Course European History #29 Between [----] and [----] an estimated [--] million people left Europe. This is one of the most significant migrations in human history. So who was leaving Europe And why Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following patrons for their generous monthly contributions that help keep Crash Course free for everyone forever: Eric Prestemon Sam Buck Mark Brouwer Efrain R. Pedroza Matthew Curls Indika Siriwardena Avi Yashchin Timothy J Kwist Brian Thomas Gossett Haixiang N/A Liu"
YouTube Link 2019-12-10T22:57Z 16.9M followers, 586.9K engagements
"School Segregation and Brown v Board: Crash Course Black American History #33 In [----] the Supreme Court ruled unanimously that public schools should be racially integrated and overturned the separate but equal doctrine established in Plessy v Ferguson decades before. This was made possible by a concerted legal effort spearheaded by the NAACP. Beginning in the 1930s the NAACP's legal defense fund (led by Thurgood Marshall at the time of the Brown Decision) pursued a strategy of bringing cases to court that would expand the civil rights of Black Americans. This multi-decade effort culminated in"
YouTube Link 2022-02-11T21:27Z 16.9M followers, 478.5K engagements
"Metals & Ceramics: Crash Course Engineering #19 Today well explore more about two of the three main types of materials that we use as engineers: metals and ceramics. Well discuss properties of metals alloys ceramics clay cement and glass-ceramic materials. Well also look at the applications of our materials with microelectromechanical systems and accelerometers. Correction: aluminum oxide is not rust; rust refers only to iron oxide. Aluminum does corrode and the process by which it corrodes has been referred to as 'rusting' even if it is technically not rusting unless the material is iron or"
YouTube Link 2018-09-27T19:01Z 16.9M followers, 275.1K engagements
"Animal Defense Systems: How Skin Snot and Cells Keep Us Healthy: Crash Course Biology #45 The world is full of microbes and viruses that can get us sick but weve got an Avengers-style defense system ready to take them on. In this episode of Crash Course Biology well learn about an animals immune system from their skin to inflammatory responses to the adaptive immune system and all the special cells and antibodies that come with it. Introduction: Defending Against Pathogens 00:00 The Integumentary System 01:09 Internal Defenses 02:29 Asymptomatic Infections 05:52 Healing 06:31 Adaptive"
YouTube Link 2024-06-04T16:00Z 16.9M followers, 48.5K engagements
"Columbus Vasco da Gama and Zheng He - 15th Century Mariners: Crash Course World History #21 In which John Green teaches you about the beginning of the so-called Age of Discovery. You've probably heard of Christopher Columbus who "discovered" America in [----] but what about Vasco da Gama How about Zheng He Columbus gets a bad rap from many modern historians but it turns out he was pretty important as far as the history of the world goes. That said he wasn't the only pioneer plying the seas in the 1400s. In Portugal Vasco da Gama was busy integrating Europe into the Indian Ocean Trade by sailing"
YouTube Link 2012-06-15T01:37Z 16.9M followers, 4.4M engagements
"Moonlight: Crash Course Film Criticism #13 Moonlight is a hard-edged yet beautifully made story about a black American dealing with his sexuality in a sometimes unforgiving and violent world. Its director Barry Jenkins uses every trick in the filmmaking book to put us in the perspective of the main character Chiron. It's an amazing accomplishment as Michael Aranda talks about in this episode of Crash Course Film Criticism. *** Check out all [--] films we'll be talking about below Citizen Kane Aliens Where Are My Children Selma In the Mood For Love Do the Right Thing Lost In Translation"
YouTube Link 2018-04-12T20:55Z 16.9M followers, 350K engagements
"The Rise of Conservatism: Crash Course US History #41 In which John Green teaches you about the rise of the conservative movement in United States politics. So the sixties are often remembered for the liberal changes that the decade brought to America but lest you forget Richard Nixon was elected to the presidency during the sixties. The conservative movement didn't start with Nixon though. Modern conservatism really entered mainstream consciousness during the [----] presidential contest between the incumbent president and Kennedy torch-bearer Lyndon B Johnson and Republican Senator Barry"
YouTube Link 2013-12-13T23:48Z 16.9M followers, 3.9M engagements
"Compression: Crash Course Computer Science #21 Get your first two months of CuriosityStream free by going to http://curiositystream.com/crashcourse and using the promo code crashcourse. So last episode we talked about some basic file formats but what we didnt talk about is compression. Often files are way too large to be easily stored on hard drives or transferred over the Internet - the solution unsurprisingly is to make them smaller. Today were going to talk about lossless compression which will give you the exact same thing when reassembled as well as lossy compression which uses the"
YouTube Link 2017-07-26T21:25Z 16.9M followers, 596.4K engagements
"Foreign Policy: Crash Course Government and Politics #50 Today Craig finishes up our series on U.S. Government and Politics by talking about both the least and most important aspect of government: foreign policy. Foreign policy is important because it has the potential to affect the largest number of people but at the same time it tends to play a minimal role in our perception of the government (unless were at war). Foreign policy addresses diplomacy security human rights economics and the environment at a global scale and were going to talk about how our government has approached each of"
YouTube Link 2016-03-05T01:46Z 16.9M followers, 1M engagements
"Eclipses: Crash Course Astronomy #5 The big question in the comments last week was "BUT WHAT ABOUT ECLIPSES" Today Phil breaks 'em down for you. This episode is sponsored by Squarespace: http://www.squarespace.com/crashcourse Check out the Crash Course Astronomy solar system poster here: http://store.dftba.com/products/crashcourse-astronomy-poster -- As promised Phil's sun spotting recommendations: Astronomers Without Borders (charitable org): http://store.astronomerswithoutborders.org/index.phpmain_page=product_info&cPath=8&products_id=3 Rainbow Symphony glasses:"
YouTube Link 2015-02-13T16:00Z 16.9M followers, 2.1M engagements
"Polar & Non-Polar Molecules: Crash Course Chemistry #23 Molecules come in infinite varieties so in order to help the complicated chemical world make a little more sense we classify and categorize them. One of the most important of those classifications is whether a molecule is polar or non-polar which describes a kind of symmetry - not just of the molecule but of the charge. In this edition of Crash Course Chemistry Hank comes out for Team Polar and describes why these molecules are so interesting to him. You'll learn that molecules need to have both charge asymmetry and geometric asymmetry"
YouTube Link 2013-07-23T02:59Z 16.9M followers, 4.6M engagements
"Adolescence: Crash Course Psychology #20 In this episode of Crash Course Psychology Hank has a look at that oh-so-troublesome time in everyone's life: Adolescence He talks about identity individuality and The Breakfast Club. Want more videos about psychology Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych -- Chapters: Introduction: The Breakfast Club 00:00 Erikson's [--] Stages of Progressive Psychosocial Development 2:05 Adolescence: Identity vs. Role Confusion 2:51 Young Adulthood: Intimacy vs. Isolation 3:39 Middle Adulthood: Generativity vs. Stagnation 4:35"
YouTube Link 2014-06-23T16:00Z 16.9M followers, 3.1M engagements
"Peripheral Nervous System: Crash Course Anatomy & Physiology #12 It is now time to meet the system that helps your brain stay in touch with the outside world. We follow up last week's tour of the central nervous system with a look at your peripheral nervous system its afferent and efferent divisions how it processes information the reflex arc and what your brain has to say about pain. Pssst. we made flashcards to help you review the content in this episode Find them on the free Crash Course App Download it here for Apple Devices: https://apple.co/3d4eyZo Download it here for Android Devices:"
YouTube Link 2015-03-30T21:00Z 16.9M followers, 3.4M engagements
"Test Statistics: Crash Course Statistics #26 Test statistics allow us to quantify how close things are to our expectations or theories. Instead of going on our gut feelings they allow us to add a little mathematical rigor when asking the question: Is this random or real Today well introduce some examples using both t-tests and z-tests and explain how critical values and p-values are different ways of telling us the same information. Well get to some other test statistics like F tests and chi-square in a future episode. Crash Course is on Patreon You can support us directly by signing up at"
YouTube Link 2018-08-08T21:43Z 16.9M followers, 284.5K engagements
"Growth Cities and Immigration: Crash Course US History #25 In which John Green teaches you about the massive immigration to the United States during the late 19th and early 20th centuries. Immigrants flocked to the US from all over the world in this time period. Millions of Europeans moved to the US where they drove the growth of cities and manned the rapid industrialization that was taking place. In the western US many many Chinese immigrants arrived to work on the railroad and in mines. As is often the case in the United States the people who already lived in the US reacted kind of badly to"
YouTube Link 2013-08-15T22:06Z 16.9M followers, 3.8M engagements
"Cultures Subcultures and Countercultures: Crash Course Sociology #11 What is culture How do we define it and how does it change Well explore different categories of culture like low culture high culture and sub-cultures. We'll also revisit our founding theories to consider both a structural functionalist and a conflict theory perspective on what cultures mean for society. Crash Course is made with Adobe Creative Cloud. Get a free trial here: https://www.adobe.com/creativecloud.html *** Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse"
YouTube Link 2017-05-22T20:00Z 16.9M followers, 1.7M engagements
"What Is a Good Life: Crash Course Philosophy #46 In our final episode of Crash Course Philosophy we consider what it means to live a good life. Well look at the myth of Sisyphus Robert Nozicks experience machine Aristotles eudaimonistic picture of a good human life and the existentialists view that we each determine the value of our own lives. And well think about how you too can live the life of a philosopher. -- Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios -- Want to find Crash Course elsewhere on the internet Facebook -"
YouTube Link 2017-02-13T22:30Z 16.9M followers, 1.4M engagements
"Patents Novelty and Trolls: Crash Course Intellectual Property #4 This week Stan teaches you about patents. It turns out they're patently complicated So patents have some similarities to copyright in that they grant a limited monopoly to people who invent things. The key difference between patents and copyright is that patents are for THINGS. Copyright is for an idea. So if you've come up with a great new invention like for example a condiment gun you should get a patent. We'll also talk about some of the limitations and problems of patents including patent trolls Thanks to the following"
YouTube Link 2015-05-14T16:08Z 16.9M followers, 453.4K engagements
"LARP: Crash Course Games #26 Today were going to talk about LARPs or live action role-playing games. Larping tends to conjure up the image of a bunch of nerds hitting each other with foam weapons but its much more than that. LARPs merge performance community and art in a way that allows players to experience different lives within the safe confines of a game. And it isnt all just medieval battles either there are LARPs for just about any kind of game scenario you could imagine and even some that you might not - like those designed to help players better understand the real-world struggles of"
YouTube Link 2016-11-12T00:18Z 16.9M followers, 154K engagements
"How Your Biology Affects Your Health: Crash Course Public Health #2 Today we are going to begin our discussion on the determinants of health which are all of the conditions we are born live and work in that have an influence on our overall wellbeing. Now these determinants can span everything from your education level to income level to genetic code so today we're just going to focus on the biological factors like our age genes and sex and take a closer look at their impacts. Check out our shared playlist with APHA: https://www.youtube.com/playlistlist=PLDjqc55aK3kywF2dd97_Jh5iP0d2ARhdo"
YouTube Link 2022-08-11T17:00Z 16.9M followers, 118.2K engagements
"Introduction to the Solar System: Crash Course Astronomy #9 In today's Crash Course Astronomy Phil takes a look at the explosive history of our cosmic backyard. We explore how we went from a giant ball of gas to the system of planets and other celestial objects we have today. This episode is sponsored by Squarespace: http://www.squarespace.com/crashcourse Check out the Crash Course Astronomy solar system poster here: http://store.dftba.com/products/crashcourse-astronomy-poster -- Chapters: Introduction 00:00 Geocentrism vs Heliocentrism 0:51 Makeup of the Solar System 2:38 Is Pluto a Planet"
YouTube Link 2015-03-12T23:00Z 16.9M followers, 2.3M engagements
"The Gravity of the Situation: Crash Course Astronomy #7 In today's episode Phil looks at how gravity plays out across the universe. This episode is sponsored by Squarespace: http://www.squarespace.com/crashcourse Check out the Crash Course Astronomy solar system poster here: http://store.dftba.com/products/crashcourse-astronomy-poster -- Chapters: Introduction 00:00 Understanding Mass 1:11 What is Gravity 2:17 Different Types of Orbit 3:41 Escape Velocity 5:30 Why Are Astronauts Weightless 7:03 Gravity Warps Space 8:17 Review 8:43 -- PBS Digital Studios: http://youtube.com/pbsdigitalstudios"
YouTube Link 2015-02-26T22:00Z 16.9M followers, 1.7M engagements
"The Natives and the English - Crash Course US History #3 In which John Green teaches you about relations between the early English colonists and the Native people they encountered in the New World. In short these relations were poor. As soon as they arrived the English were in conflict with the native people. At Jamestown Captain John Smith briefly managed to get the colony on pretty solid footing with the local tribes but it didn't last and a long series of wars with the natives ensued. This pattern would continue in US history with settlers pushing into native lands and pushing the"
YouTube Link 2013-02-14T23:13Z 16.9M followers, 5M engagements
"Social Influence: Crash Course Psychology #38 Why do people sometimes do bad things just because someone else told them to And what does the term Groupthink meanIn today's episode of Crash Course Psychology Hank talks about the ideas of Social Influence and how it can affect our decisions to act or to not act. Want more videos about psychology Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych -- Chapters: Introduction 00:00 Milgram's Obedience Experiment 0:31 Social Influence & Conformity 3:22 Asch's Conformity Experiment 4:08 Cultural Expectations & Normative"
YouTube Link 2014-11-12T00:46Z 16.9M followers, 3.1M engagements
"The Language of Film: Crash Course Film History #5 In this episode of Crash Course Film History we talk about the development of the language of films by filmmakers like Edwin S. Porter and his films; Life of an American Fireman and The Great Train Robbery. Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios Want to know more about Craig https://www.youtube.com/user/wheezywaiter The Latest from PBS Digital Studios: https://www.youtube.com/playlistlist=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV *** Images and Video Used are in the Public Domain and from the Library"
YouTube Link 2017-05-11T21:45Z 16.9M followers, 422.6K engagements
"Influence & Persuasion: Crash Course Media Literacy #6 Weve mentioned already that theres a lot of money in media and a huge chunk of that money is spent on trying to get you to do something buy something vote a certain way change a behavior. How does advertising work And whats the difference between advertising public relations and propaganda Were going to talk about all that and more today. *** Resources: How To Use [--] Psychological Theories To Persuade People https://www.fastcompany.com/3030173/how-to-use-10-psychological-theories-to-persuade-people The [--] Principles of Persuasion"
YouTube Link 2018-04-03T19:56Z 16.9M followers, 421.1K engagements
"The Nervous System Part [--] - Synapses: Crash Course Anatomy & Physiology #10 We continue our tour of the nervous system by looking at synapses and the crazy stuff cocaine does to your brain. Pssst. we made flashcards to help you review the content in this episode Find them on the free Crash Course App Download it here for Apple Devices: https://apple.co/3d4eyZo Download it here for Android Devices: https://bit.ly/2SrDulJ Chapters: Introduction: What are Synapses 00:00 Electrical vs Chemical Synapses 1:58 How Electrical Synapses Work: Gap Junctions 2:56 How Chemical Synapses Work:"
YouTube Link 2015-03-10T17:30Z 16.9M followers, 5.3M engagements
"The Future of Public Health: Crash Course Public Health #10 We dont know what the next big scientific breakthrough is going to be or what futuristic diseases well encounter. But when it comes to our health we actually have a pretty good idea of what could be next. And we also have some ideas about what we need to do today to prepare. In this final episode of Crash Course Public Health were going to take a look into the future with some roadmaps from the present. Chapters: Looking to the Future 00:00 Disease Surveillance 2:55 A Planetary Approach 5:05 Technology & Misinformation 8:12 Health"
YouTube Link 2022-10-06T17:00Z 16.9M followers, 108.6K engagements
"Great Glands - Your Endocrine System: CrashCourse Biology #33 Hank fills us in on the endocrine system - the system of glands that produce and secrete different types of hormones directly into the bloodstream to regulate the body's growth metabolism and sexual development & function. References: http://www.vivo.colostate.edu/hbooks/pathphys/endocrine/hypopit/anatomy.html http://www.vivo.colostate.edu/hbooks/pathphys/endocrine/index.html http://www.khanacademy.org/science/healthcare-and-medicine/v/intro-to-the-endocrine-system http://www.ncbi.nlm.nih.gov/pubmed/21540080"
YouTube Link 2012-09-10T20:00Z 16.9M followers, 2M engagements
"Substitution Reactions - SN1 and SN2 Mechanisms: Crash Course Organic Chemistry #21 Weve already learned a bit about substitution reactions in organic chemistry and the two different paths they can follow: SN1 and SN2. In order to better predict the products of a substitution reaction and understand how they work we need to be able to figure out which mechanism a reaction is likely to follow. In this episode of Crash Course Organic Chemistry well deepen our knowledge of substitution reactions by looking at factors like substrate structure and reaction conditions to determine whether SN1 or"
YouTube Link 2021-02-08T17:22Z 16.9M followers, 385.8K engagements
"Photosynthesis and Cellular Respiration: Crash Course Botany #5 Plants and trees may seem pretty passive but behind the scenes their cells are working hard to put on a magic show. In this episode of Crash Course Botany well explore how the processes of photosynthesis and cellular respiration work why theyre so critical for all life on Earth and how theyre helping us to forge a greener path to the future. Chapters: Plants' Magic Show 00:00 Photosynthesis 1:27 The Light-Dependent Reactions 3:02 The Light-Independent Reactions 4:18 Cellular Respiration 5:32 Biofuels 8:50 Review & Credits 11:43"
YouTube Link 2023-06-22T16:00Z 16.9M followers, 349.2K engagements
"The Physics of Music: Crash Course Physics #19 Music plays a big part in many of our lives. Whether you just like to listen or you enjoy playing an instrument music is powerful. So what is music How does it work What are the physics of music In this episode of Crash Course Physics Shini talks to us about how music functions in terms of waves and how these waves interact with our ears. -- Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios -- Want to find Crash Course elsewhere on the internet Facebook - http://www.facebook.com/YouTubeCrashC. Twitter -"
YouTube Link 2016-08-11T22:27Z 16.9M followers, 852.7K engagements
"Graphical User Interfaces: Crash Course Computer Science #26 Today we're going to discuss the critical role graphical user interfaces or GUIs played in the adoption of computers. Before the mid 1980's the most common way people could interact with their devices was through command line interfaces which though efficient aren't really designed for casual users. This all changed with the introduction of the Macintosh by Apple in [----]. It was the first mainstream computer to use a GUI standing on the shoulder of nearly two decades of innovation including work from the father of the GUI himself"
YouTube Link 2017-08-30T21:09Z 16.9M followers, 514.7K engagements
"Absolute Monarchy: Crash Course European History #13 So far the rulers of Europe have been working to consolidate their power and expand their kingdoms and this is it. The moment they've been working toward: Absolute Monarchy. We're going to learn about how kings and queens became absolute rulers in Europe and where better to start than with Louis XIV of France who is really the model for absolute rule. Crash Course is on Patreon You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following patrons for their generous monthly contributions that help"
YouTube Link 2019-07-27T15:09Z 16.9M followers, 1.5M engagements
"How Laws Affect Your Health: Crash Course Public Health #8 If youve been paying attention to the news since oh say [----] then youll no doubt be aware that public health policy can often create tension. Having policies that affect public health can and does save lives but not all policies affecting our health are health policies. Dont worry were going to break it all down in this episode of Crash Course Public Health where we will discuss how an orthopedic surgeons love of racing helped create seatbelt policies in the US and why sometimes laws governing what can be built where affect our"
YouTube Link 2022-09-22T17:00Z 16.9M followers, 88.1K engagements
"International Climate Agreements: Crash Course Climate & Energy #10 Climate change is being addressed by individuals activist groups and large corporations but its going to take getting entire nations on board if we want to really meet our climate goals. In this episode of Crash Course Climate and Energy well learn about the alphabet soup that is global climate organization and take a look at some successful and not-so-successful international climate policies. Chapters: Introduction: Global Cooperation 00:00 The UNEP IPCC & UNFCCC 1:43 The Kyoto Protocol 5:34 The Paris Agreement & Green"
YouTube Link 2023-04-05T16:00Z 16.9M followers, 58.7K engagements
"Latin American Revolutions: Crash Course World History #31 In which John Green talks about the many revolutions of Latin America in the 19th century. At the beginning of the 1800s Latin America was firmly under the control of Spain and Portugal. The revolutionary zeal that had recently created the United States and had taken off Louis XVI's head in France arrived in South America and a racially diverse group of people who felt more South American than European took over. John covers the soft revolution of Brazil in which Prince Pedro boldly seized power from his father but promised to give it"
YouTube Link 2012-08-23T22:09Z 16.9M followers, 5.1M engagements
"Venus: Crash Course Astronomy #14 Venus is a gorgeous naked-eye planet hanging like a diamond in the twilight -- but its beauty is best looked at from afar. Even though Mercury is closer to the sun Venus is the hottest planet in the solar system due to a runaway greenhouse effect and has the most volcanic activity in the solar system. Its north and south poles were flipped causing it to rotate backward and making for very strange days on this beautiful but inhospitable world. This episode is brought to you by Squarespace http://www.squarespace.com/crashcourse Check out the Crash Course"
YouTube Link 2015-04-24T18:33Z 16.9M followers, 1.8M engagements
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