Photo: Gorillas Are No Dummies, Zoo Study Shows



Because gorillas (above, a young gorilla in the Democratic Republic of the Congo) rarely use tools, scientists had believed the great apes were less intelligent than their chimpanzee cousins.

But zoo gorillas demonstrate an aptitude for learning number sequences, suggesting the apes are sharper than previously thought, scientists said in May 2009s.

Photograph by Paul Zahl/NGS


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