The Gorilla Foundation was co-founded by Francine “Penny” Patterson. As a graduate student at Stanford University, Patterson in the early 1970s began working with a 1-year-old Koko to teach ...

Koko, the western lowland gorilla who learned sign language, died on Thursday. Koko, the western lowland gorilla who learned sign language and became a pop-culture phenomenon, has died at the age ...

Bettmann Archive/Getty Images Koko will be buried at a grave site on the Gorilla Foundation's seven-acre preserve in Woodside, California, alongside Michael, a western lowland gorilla who was ...

Koko, the gorilla who mastered sign language and counted the actor Robin Williams and Red Hot Chili Peppers bassist Flea among her friends, has died at age 46. The Gorilla Foundation said the ...

"The Gorilla Foundation is sad to announce the passing of our beloved Koko," the research center says, informing the world about the death of a gorilla who fascinated and elated millions of people ...

Koko, the gorilla who mastered sign language and showed the world what great apes can do, has died. She died Tuesday in her sleep at age 46, The Gorilla Foundation said in a statement.

Koko, a beloved gorilla who learned to communicate with humans and then stole their hearts, has died. The Gorilla Foundation said the 46-year-old celebrity ape — a western lowland gorilla ...

Koko, a western lowland gorilla who became internationally famous for learning to communicate in sign language, has died at the age of 46. The Gorilla Foundation announced Koko’s death ...

REDWOOD CITY — A settlement has been reached in a civil suit by two former workers at The Gorilla Foundation who claimed they were routinely pressured to expose their nipples to Koko the ...

WOODSIDE, Calif.-- 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 preserve in ...