Koko is a female gorilla living in captivity. Penny Patterson is the ethnologist teaching Koko to communicate her feelings though sign language. Barbet Schroeder examines, through several interviews with scientists and researchers, the issue of the ethics of animal testing and comparing animals to human beings, considering the sophistication of their languages and emotions.

  • Duration: 85
  • Production year: 1978
  • Country: France

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