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Q28595474-28B20BDD-8FFE-4C21-88BE-3D2EF46C6F57
Q28595474-28B20BDD-8FFE-4C21-88BE-3D2EF46C6F57
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http://www.wikidata.org/entity/statement/Q28595474-28B20BDD-8FFE-4C21-88BE-3D2EF46C6F57
Nut Cracking Tools Used by Captive Chimpanzees (Pan troglodytes) and Their Comparison with Early Stone Age Percussive Artefacts from Olduvai Gorge
P2860
Q28595474-28B20BDD-8FFE-4C21-88BE-3D2EF46C6F57
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http://www.wikidata.org/entity/statement/Q28595474-28B20BDD-8FFE-4C21-88BE-3D2EF46C6F57
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817296f7177284da47446e6ec802577bb9dfdfe3
P2860
Tool use as a way to assess cognition: how do captive chimpanzees handle the weight of the hammer when cracking a nut?