Koko, the western lowland gorilla that began to learn sign language in the San Francisco Zoo and eventually became a celebrity beloved by millions, passed away in her sleep Tuesday at the age of 46.

Koko, the gorilla who mastered sign language, has died. The Gorilla Foundation says the 46-year-old western lowland gorilla died in its sleep at the foundation’s preserve in California’s Sana Cruz ...

Koko the gorilla is famous for having learned a number of hand signs to help her communicate with her caregivers. So when she was introduced to a box full of kittens she told her trainers, in the only ...

Koko the gorilla, whose remarkable sign-language ability and motherly attachment to pet cats helped change the world’s views about the intelligence of animals and their capacity for empathy, has died ...

Koko appeared in many documentaries and twice in National Geographic. Her 1978 cover featured a photo she had taken of herself in a mirror You can save this article by registering for free here. Or ...

Koko, a beloved gorilla that 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 - died in ...

Koko the gorilla wasn’t just an experiment - she was a conversation. Using American Sign Language, she could express over 1,000 words, understand 2,000 spoken words, and communicate thoughts, feelings ...

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 ...

SAN FRANCISCO—Koko the gorilla, whose remarkable sign-language ability and motherly attachment to pet cats helped change the world’s views about the intelligence of animals and their capacity for ...

The Gorilla Foundation says the 46-year-old western lowland gorilla died in her sleep at the foundation’s preserve in California’s Santa Cruz mountains on Tuesday.