Young female chimpanzees treat sticks as dolls: Growing evidence of biological basis for gender-specific play in humans

Researchers have reported some of the first evidence that chimpanzee youngsters in the wild may tend to play differently depending on their sex, just as human children around the world do. Scientists say female chimpanzees appear to treat sticks as dolls, carrying them around until they have offspring of their own. Young males engage in such behavior much less frequently.

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