A full-grown male chimpanzee carries a stick at the Sweetwaters Chimpanzee Sanctuary in Kenya. The sanctuary is the work of primatologist Jane Goodall.
September 18, 2014 A new study bolsters the theory that chimpanzees kill rivals as an adaptation to their natural environment and not as a result of human impact.
Bonobos at the Lola ya Bonobo sanctuary near Kinshasa in the Democratic Republic of Congo in 2006.
Issouf Sanogo/AFP/Getty Images
March 21, 2013 Morality emerges from our evolved nature: so claims primatologist Frans de Waal, who takes aim in his new book at the view that morality comes from God. Commentator Barbara J. King finds de Waal's argument persuasive.
Bonobos sharing food and friendship.
JingZhi Tan/Duke University
January 3, 2013 Humans have a long tradition of sharing food with strangers, and it turns out bonobos do it, too. In fact, the bonobos in a recent experiment were more likely to offer fruit and nuts to a stranger than to a familiar ape. But that doesn't necessarily mean they're altruistic.
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