Tool manufacture was once regarded a defining feature of humankind, but it is now known that a variety of animal species use and make their own tools. In nature, some of the most striking cases of tool-related behaviour are seen not just among close relatives of Homo sapiens, such as chimps...
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http://skpsoft.com/view/animal+news/skilful-cockatoos-able-to-shape-same-tool-from-different-materials/
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