A documentary that follows Dr. Penny Patterson's current scientific study of Koko, a gorilla who communicates through American Sign Language.
Les Films du Losange, INA
Checkpoint Zoo
I'll Come to You with Deaf Eyes
Mountain Gorilla
Virunga
Lucy the Human Chimp
Regard Silence
Never a Backward Step
The World at Arm's Length
Dominion
What The Durrells Did Next