The riskiest behavior in humans peaks in adolescence. Researchers from the University of Michigan and James Madison ...

AMES, Iowa – Iowa State University Anthropology Professor Jill Pruetz long suspected that man-made changes influenced the aggressive behavior researchers have observed among chimpanzees. However, her ...

AMES, Iowa – Shocking is one word Jill Pruetz uses to describe the behavior she witnessed after a chimp was killed at her research site in Fongoli, Senegal. The fact that chimps would kill a member of ...

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

When ya gotta go, ya gotta go, and if it sometimes seems like the urge to pee seems more pressing when others nearby are letting loose—well, there’s now a bit of science to back that up. It turns out ...

Chimpanzees living in a sanctuary in Africa have developed a “fashion trend” for dangling blades of grass or sticks from their ear holes and their behinds, a new study shows. In 2010, researchers ...

Captive chimpanzees have started dangling grass out of their ears and butts in an unusual fad-like "trend," a new study finds. The chimps (Pan troglodytes) insert a blade of grass or stick into their ...

While watching a group of captive chimpanzees for her graduate research, Ena Onishi noticed something odd about the primates. "They seemed to have a tendency to urinate around the same time," said ...