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Frans B.M. de Waal has news for people who think that the tendency to establish cultural norms separates humans from other animals: By teaching a high-ranking female chimpanzee how to solve a complicated puzzle and then watching copycat behavior spread among her group, de Waal and his colleagues documented evidence of both complex social learning and conformity in nonhumans. ... More>
APS Fellow Michael Tomasello believes that the most salient difference between us and our closest animal relatives is our ability to determine and share intentionality — that is, to understand and share psychological states of mind. Tomasello has spent more than 20 years comparing the behavior of adult great apes with that of human children. ... More>