In the 1960s and 70s, a group of chimpanzees astonished the world by learning sign language. Only two remain and one question still lingers—was it worth it?

Back in the 1970s, a chimpanzee named Nim Chimpsky took part in a Columbia University research study called "Project Nim." Project Nim was led by Herbert Terrace, a psychologist at Columbia who was ...

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 ...