Chimpanzee cultures differ between neighbors: Neighboring chimpanzee groups use different hammers to crack nuts

Culture has long been proposed to be a distinguishing feature of the human species. However, an increasing amount of evidence from the field has shown that in several animals, differences in behaviors between populations actually reflect the presence of culture in these species. These studies have mainly come from populations that live far apart from each other which make it difficult to exclude ecological or genetic differences as being the underlying reasons for the observed behavioral differences.

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