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chimpanzeesPhys Org
•Science
Science
89% Informative
Researchers from Wageningen University and German Primate Research Center studied chimpanzees in Guinea-Bissau , West Africa .
Adult male chimpanzees repeatedly struck stones against tree trunks, resulting in characteristic piles of stones at the base of these trees.
The study is published in the journal Biology Letters .
Young chimpanzees adopt the behavior from older group members, indicating that it is learned socially rather than genetically inherited.
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