Like in Humans, Genes Drive Half of Chimp Intelligence

Chimpanzees and other great apes are known for their intelligence: They can learn words, play with objects, and even seem to mourn the deaths of their friends. But just as for humans, cognitive abilities vary from one animal to the next. Now, in one of the largest studies ever conducted on chimp cognition, researchers report that those individual differences are due in no small part to genetic makeup. 

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