From Back to Godhead
For thirteen years at the Gorilla Foundation in Woodside, California, a developmental psychologist has been teaching sign language to Koko, a female gorilla. Although Koko shows remarkably human emotions and intelligence, her psychologist says she’s an average gorilla at best.
The Comfortable Hole
Koko’s psychologist first tried teaching her the same hand signs used by the deaf, but in time Koko began inventing her own sign language. For example, when she was shown a weddin