Chimpanzees are our closest living relatives, so their behavior offers clues about the origins of human social instincts.

When Aristotle claimed that humans differ from other animals because they have the ability to be rational, he understood rational to mean that we could form our views and beliefs based on evidence, ...

Chimpanzees could be consuming the equivalent of a beer and half a day from eating alcoholic fruits, according to the first estimates of wild chimp alcohol intake. By virtue of their fruit-filled ...