Has any gorilla who knows sign language, e.g. Koko, given any indication that they are aware of how closely related humans are to them? - Quora
Why Koko the Gorilla, Who Mastered Sign Language, Mattered
Koko: A Talking Gorilla (1978) | The Criterion Collection
Conversations with Koko: an audience with world's favourite 'talking' gorilla
Why Koko the Gorilla, Who Mastered Sign Language, Mattered
Great ape language - Wikipedia
Koko the gorilla goes to the rez and speaks sign language to the Native Relatives there. - YouTube
Gorilla uses sign language to communicate with zoo visitors - YouTube
Communication – The Gorilla Foundation
Sign Language – The Gorilla Foundation
Sign Language – The Gorilla Foundation
Watch Koko: The Gorilla Who Talks | Prime Video
Gorilla uses sign language to communicate with zoo visitors - YouTube
Video shows New Year message from Koko the talking gorilla | Daily Mail Online
Koko the Gorilla's Best Moments: From Sign Language to Meeting Mister Rogers - YouTube
The Apes Who Learned Sign Language
What Koko the gorilla could and couldn't do
Gorillas are showing signs of learning to talk, say researchers | The Independent | The Independent
How Koko forever changed the way we think about gorillas
Why Koko the Gorilla, Who Mastered Sign Language, Mattered
Dr. Goodall Remembers Koko the Beloved Gorilla
Gorilla
