Add Yahoo as a preferred source to see more of our stories on Google. Chimpanzee eating grass, with inset of two chimpanzees interacting. Move over, fashion week — the hottest accessory of the season ...

A team of researchers from Utrecht University, Durham University, and other institutions have observed something remarkable at a chimpanzee sanctuary in Zambia. Several chimpanzees from one particular ...

The riskiest behavior in humans peaks in adolescence. Researchers from the University of Michigan and James Madison University expected to find risky behavior to peak in adolescence in a study of ...

Chimpanzees exhibit sophisticated self-medication, using plants like "bitter leaf" to combat parasites and rough leaves to ...

Move over, fashion week — the hottest accessory of the season is a blade of grass shoved in your ear. Or, for the truly daring: your butt. Chimpanzees at a Zambian wildlife sanctuary are going viral — ...