Koko gained public attention as the subject of two National Geographic cover stories and, in 1985, the best-selling children's picture book, Koko's Kitten. Koko became the world's most famous …

Oct 22, 2025 · Koko the Gorilla died unexpectedly at the Gorilla Foundation's preserve in 2018, but the 46-year-old primate had a final message for her fans.

Apr 27, 2025 · Koko the gorilla, who became famous for her use of sign language, died in her sleep at age 46 in her California preserve on June 19, 2018.

The Gorilla Foundation is best known for conducting the longest interspecies communication study in history (almost 5 decades) and the only one involving gorillas: Project Koko.

Koko, the western lowland gorilla that died in her sleep Tuesday at age 46, was renowned for her emotional depth and ability to communicate in sign language.

Koko is perhaps the best known gorilla in the world because of her sign language and artistic abilities, her relationships with kittens, and a considerable amount of worldwide media since …

Kōkō, short for Kōtōgakkō, meaning a high school. See Secondary education in Japan.