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Experts and parents alike have long debated whether human boys and girls tend to be more or less physically aggressive because of nature or nurture. New research published in Proceedings of the National Academy of Sciences on young chimpanzees indicates...

The answer to a topic of debate among researchers about the anatomy of our ancient human ancestors may lie in the quirky life of a wealthy New York socialite who raised a chimpanzee named Suzy to live like a human child in the 1930s.