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![JamesLucasIT Avatar](https://lunarcrush.com/gi/w:24/cr:twitter::1027214104661028864.png) James Lucas [@JamesLucasIT](/creator/twitter/JamesLucasIT) on x 723.8K followers
Created: 2025-07-14 19:37:41 UTC

The genius of the ancient Greeks 🧵 

X. Carl Sagan explains how Eratosthenes knew the Earth was round and calculated its circumference over XXXXX years ago.

![](https://pbs.twimg.com/amplify_video_thumb/1944819921826824192/img/PcOcv7UDWuRzChiU.jpg)

XXXXXXX engagements

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[Post Link](https://x.com/JamesLucasIT/status/1944843766163992890)