TIL that "Chimpanzees, who cannot swim, have drowned in zoo moats trying to save others." And "Given the chance to get food by pulling a chain that would also deliver an electric shock to a companion, Rhesus monkeys will starve themselves for several days."

submitted by gratyl to todayilearned

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