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TIL that capuchin monkeys in Brazil have been observed using stones to crack open nuts for over 3,000 years. They’re so skilled at it that some rocks show ancient wear marks, making these monkeys accidental archaeologists with their own "prehistoric" toolkits.

https://en.wikipedia.org/wiki/Capuchin_monkey#Tool_use
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1gqb2zl/til_that_capuchin_monkeys_in_brazil_have_been/