SUSAN KUKLIN / SCIENCE PHOTO LIBRARY SUSAN KUKLIN / SCIENCE PHOTO LIBRARY
Herbert Terrace with Nim Chimpsky the chimpanzee (Pan troglodytes), named after American linguist, philosopher, cognitive scientist, and political activist Noam Chomsky. Psychologist Herbert Terrace of Columbia University is holding a puppet and the famous chimpanzee is signing "hug". Photographed during project Nim, an extended study of animal language acquisition conducted in the 1970s.
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