Jun 21, 2018

Pioneering gorilla Koko dies at 46

Photo: Bettman/Getty Images

Koko, the western lowland gorilla who amazed with her vocabulary and communication skills, died in her sleep Wednesday at the age of 46 at The Gorilla Foundation in San Francisco.

Why it matters: Koko, chosen for a psychology research project when she was just one year old, shattered perceptions of language abilities for non-human primates.

Dr. Penny Patterson, who initially chose Koko for her experiment, worked with the gorilla from the time she was selected. Per The Gorilla Foundation, Patterson sought to discover whether a primate taught sign language from a young age would develop to use language.

The impact: Koko's social skills made headlines throughout her life, giving a voice to non-human emotion and speaking to the cognitive abilities of primates.

  • Koko eventually could communicate more than 1,000 signs.
  • In 1983, Koko asked for a cat, and developed an affectionate relationship with it, mourning its death, per a contemporary report from the Los Angeles Times.
  • She famously met actor Robin Williams in 2001, and delighted both Williams and fans by trying on his glasses and seemed to remember him from a movie.
  • When she demonstrated she had learned to play the recorder in 2012, she shocked scientists who believed that primates could not regulate their breath, per NPR.

The catch: There have been questions surrounding the ethics of keeping a primate in captivity for her entire life, per organizations like PETA, and Patterson herself said she hoped the experiment wouldn't be duplicated because of how unnatural Koko's living circumstances were.

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