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Making palm oil

©ANC Productions Inc. and Primate Research Institute, Kyoto University.

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Brittle stones

Inadequate hammer

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Other ways of stabilizing the anvil

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Metatool: wedge stone use

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Transporting stone tools

Transporting stone tools

How to obtain stone tools?

How to obtain stone tools?

Retrieving stone tools

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Deception

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Nut-cracking can be dangerous

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Carrying nuts

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