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 ...

This video will make you wonder just how smart a gorilla can be. The clip that has gone viral shows a gorilla using sign language to tell onlookers a very important message.

In 2004, Koko used American Sign Language to communicate that her mouth hurt and used a pain scale of 1 to 10 to show how badly it hurt. “Koko represents what language may have been 5 million ...

Koko was born at the San Francisco Zoo, and Dr. Francine Patterson began teaching the gorilla sign language that became part of a Stanford University project in 1974.

She loved baby dolls. And kittens. via GIPHY "Koko's capacity for language and empathy has opened the minds and hearts of millions," the Gorilla Foundation said in its statement.

In addition to communicating back and forth with her handlers in sign language, Koko could allegedly respond to spoken various English words with sign language just as effectively. Notably, most ...

Another ape, Michael, was brought in and also taught sign language. However, their relationship was more like siblings than mating partners. Michael passed away in 2000.

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 ...

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, Gorilla Who Learned Sign Language, Dies At Age 46 June 21, 2018 / 9:49 AM EDT / CBS New York WOODSIDE, Calif. (CBSNewYork/AP) — Koko, the gorilla who mastered sign language, has died.

Koko, the gorilla who mastered sign language and became something of a pop culture staple, has died, the Gorilla Foundation confirmed. She was 46. Koko died in her sleep Wedneday in Woodside, Calif.

Koko was born at the San Francisco Zoo, and Dr. Francine Patterson began teaching the gorilla sign language that became part of a Stanford University project in 1974.