Add Yahoo as a preferred source to see more of our stories on Google. Sixty years ago, scientists embarked on an experiment to teach American Sign Language to chimpanzees—and ultimately prove humans ...

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 ...

ELLENSBURG — A park in downtown Ellensburg will be dedicated Saturday in memory of Washoe, the first chimpanzee to communicate with American Sign Language. Washoe came to Central Washington University ...

ELLENSBURG, Wash. - A chimpanzee who could talk to people using American Sign Language has died at Central Washington University in Ellensburg. The university's Chimpanzee and Human Communication ...