CHICAGO (WLS) -- Animal researchers have known for some time that chimpanzees are very much like us. But a new study shows that just as we go to war sometimes to protect our territory and way of life, ...

Great apes share human-like social circles, but chimpanzees and bonobos differ in how selectively they maintain close social ...

The youngest chimpanzees are the biggest risk-takers. Would humans show the same pattern if adults weren’t keeping such a ...

Adolescents are known for risky behavior, with teenagers in the U.S. more likely than younger children to die from injury. But what’s responsible for this uptick in risk-taking around puberty? Our new ...