Researchers at Kyoto University spent more than 600 hours studying 20 captive chimps to determine if urination is socially contagious among them.

There are many unsolved questions scientists have about the world. No one really was wondering what makes chimps pee, but ...

Koko the chimpanzee was a happy-go-lucky fellow, but he couldn't shake one nagging thought: his lack of a tail.

Just as people often yawn or scratch themselves when they see someone else do so, for chimpanzees, peeing is contagious ...

Urinating is a contagious behaviour among chimpanzees, a study has found ...