Koko the gorilla, the super-intelligent ape who understands ... Patterson and Cohn) were together when phone calls started coming in about the sad event. After the first call, Koko came to ...

Still, few of them get assigned as much humanity as Koko, the western lowland gorilla that purportedly ... Koko reportedly grieved for months, and signed “sad bad trouble." ...

Then she started whimpering — a distinct hooting sound that gorillas make when they are sad. We all started crying together,” researcher Ronald Cohn told the New York Post. Koko the gorilla ...

Koko, the sign language-speaking gorilla, died unexpectedly in her sleep ... but she wouldn’t play with it and kept signing: ‘Sad.’ ” Primates are not alone when it comes to self-expression.

“She became extremely sad,” Patterson said of Koko. “Robin’s ability to just ‘hang out’ with Koko, a gorilla, and in minutes become one of her closest friends, was extraordinary and ...

“Gorilla,” signed Koko. “Who gorilla ... for their preservation in circumstances of relative freedom. It is sad that the gorilla's best present prospect for survival is under the active ...

When she was told of Robin Williams's death in 2014, she became sad, Patterson wrote on Koko.org. Williams and Koko became friends after they met in 2001. The Gorilla Foundation said it will keep ...

Koko, the sign language-speaking gorilla, died unexpectedly in her sleep ... but she wouldn’t play with it and kept signing: ‘Sad.’ ” Primates are not alone when it comes to self-expression.

On June 19 came the sad news of the death of Koko, the western lowland gorilla cared for by Francine “Penny” Patterson at a sanctuary in the Santa Cruz Mountains. Many obituaries appeared ...

Koko, the signing gorilla, made me uncomfortable ... “She was looking a little sad and worried, and she looked straight at me and held two signs,” Patterson told ABC News.