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![rabamaja2010 Avatar](https://lunarcrush.com/gi/w:24/cr:twitter::1522822514686185473.png) RajRaj... [@rabamaja2010](/creator/twitter/rabamaja2010) on x 5255 followers
Created: 2025-07-20 09:15:31 UTC

The Universe XX experiment was a groundbreaking behavioral study led by American researcher John B. Calhoun in the 1960s and 1970s. He built a carefully controlled habitat for mice, often referred to as “mouse utopia,” 

#thelazyaquarist #incrediblefacts #unbelievable #Universe25

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