The bending of a hook into wire to fish for the handle of a basket is surprisingly challenging for young children under eight years of age. Now, cognitive biologists and comparative psychologists led by Isabelle Laumer and Alice Auersperg observed hook tool-making for the first time in a non-human primate species—the orangutan. To the researchers' surprise, the apes spontaneously manufactured hook tools out of straight wire within the very first trial and in a second task unbent curved wire to m... PHYS.ORG · 1 month
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