Koko the gorilla: The legacy of Francine Patterson's five-decade sign language study

For nearly five decades, psychologist Francine Patterson taught a western lowland gorilla named Koko a modified sign language — and Koko reportedly learned more than 1,000 signs, understood 2,000 spoken words, and mourned when her kitten was killed by a c

For most of her life, a western lowland gorilla named Koko was among the best-known non-human animals on the planet. She appeared twice on t

Koko Shows Us She Knows

In the above video, Koko, at 9-years-old, demonstrates her remarkable comprehension skills. When I request that Koko find something soft, sh

Koko Directs Her Playtime (KokoArc 1975)

This video shows Koko (age 4) signing and playing with Penny inside at the San Francisco Zoo. Koko loved to play chase and […] The post Koko

Ai, chimpanzee known for cognitive research on counting and painting, dies at 49 in Japan

Ai's cognitive abilities had been studied extensively since she was brought to a Japanese institute in 1977.

What Happened to Harambe? The Viral Controversy, Explained 10 Years After Gorilla's Death

Famous puzzle-solving chimps lost 20 years of life after harsh Berlin winters

A University of Auckland scientist has uncovered the fates of chimpanzees who starred in seminal psychological studies of the early 20th cen