In some cases, chimpanzees dabbed their open wounds with leaves. In rarer cases, they chewed up plant material (like leaves ...

New research on the rhythmic drumming and complex calls of chimpanzees could point scientists to the origins of language.

"I have a scar," she even told them, showing the hosts the area on her wrist where the chimp had left a mark. When asked whether she'd go visit him in Florida for some closure, Rashida, 48 ...