WOODSIDE, Calif. (CBSNewYork/AP) — Koko, the gorilla who mastered sign language, has died. The Gorilla Foundation says the 46-year-old western lowland gorilla died in her sleep at the foundation's ...

CTV National News: Tribute to a gentle giant The beloved gorilla that became famous for learning sign language has died at age 46. Todd Battis has the story of Koko.

Koko the gorilla who mastered sign language, raised kittens and once playfully tried on the glasses of the late actor Robin Williams, has died. She was 46. The Gorilla Foundation says the western ...

Even though she couldn't speak, Hanabiko the gorilla could converse quite fluently, and was more fluent in sign language than the average human. Hanabiko — better known by her nickname Koko — died on ...