Humans’ closest cousins are chimpanzees and bonobos. These smaller members of the Great Apes are intelligent, social animals. They’ve been spotted using tools to hunt, and they are emotionally complex. Chimpanzees and bonobos have been observed to mourn their dead, play make-believe, and take care of other animals—for instance, sometimes they feed turtles. All these activities are signs of great emotional intelligence.

There are some key differences between chimpanzees and bonobos, though. Chimps are more aggressive and live in male-run societies, whereas in bonobo groups, the females are in charge, and there’s generally less in-fighting.

Photo by Psych USD

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