Add Yahoo as a preferred source to see more of our stories on Google. Nothing brings a group of primates together, humans included, quite like a threat from outside. Bonobos are unique among primates ...
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Despite their contrasting reputations, bonobos and chimpanzees show similar levels of aggression in zoos
Chimpanzees have a reputation for being aggressive, while bonobos are often seen as their peaceful counterparts. This contrast has frequently been used to explain different sides of human nature.
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