TIL there was a man-made mouse utopia called Universe 25. It started with 4 males and 4 females. The colony peaked at 2200 and from there declined to extinction. Once a tipping point was reached, the mice lost instinctual behaviors. Scientists extrapolate this model to humans on earth.

submitted by Crackyospine to todayilearned [link] [415 comments]

from reddit: the front page of the internet http://ift.tt/1LKRslE

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