Koko
Dr Penny Patterson has worked with Koko the gorilla for 40 years – and taught her sign language.
Images courtesy of The Gorilla Foundation.
The images in this gallery are used with permission and are subject to copyright conditions.
Dr Penny Patterson has worked with Koko the gorilla for 40 years – and taught her sign language.
Images courtesy of The Gorilla Foundation.
The images in this gallery are used with permission and are subject to copyright conditions.