Most Americans who have visited Yellowstone or watched a nature documentary have probably used the word “buffalo” to describe the massive, shaggy animals roaming the Great Plains. That casual label, ...

A new study of chimpanzee and bonobo groups at zoos reveals similar levels of aggression. However, scientists found stark sex-based differences between the species.

I was talking to a colleague of mine who is a professor of biology. He casually commented to me "You know if an astrobiologist from Mars or some other place in the universe came to earth and decided ...