Koko, a western lowland gorilla who caught the public’s attention in the 1970s for her ability to use a form of American Sign Language, died in her sleep Tuesday morning (June 19), the Gorilla ...

Project Koko started as a PhD project to teach sign language to a baby gorilla, but as Koko began to communicate with Penny, an intense bond formed between them. Penny has now been with Koko for ...

Koko was a gorilla who used American Sign Language to communicate. While the visit was heartwarming, Williams couldn't help but joke about it when sitting on DeGeneres' couch. Robin Williams Joked ...

The Cincinnati Zoo and Botanical Garden loaned Ndume to animal psychologist Francine "Penny" Patterson and her organization, The Gorilla Foundation, in 1991. The loan was intended to provide ...