Humans are known to invent private hand gestures. Chimps in the wild do, too, a new study suggests. By Brandon Keim Parents and their children, or people who know each other well, often share some ...

ELLENSBURG -- Moja, a chimpanzee trained to communicate using American Sign Language, was found dead yesterday at Central Washington University. The 29-year-old chimp, whose name meant "first" in ...

Researchers have found two important building blocks of human speech in wild chimpanzees, one of our closest relatives. A pair of studies finds that chimp communication includes both rhythmic ...

SPOKANE, Wash. — Washoe, a female chimpanzee said to be the first non-human to acquire human language, has died of natural causes at the research institute where she was kept. Washoe, who first ...