Added: 17-07-2010 08:32:32

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At a research site in Fongoli, Senegal, a female chimpanzee breaks off a branch, chews the end to make it sharp, then uses this rudimentary spear to skewer a tasty bushbaby hiding inside a hollow tree. The footage represents an astonishing breakthrough for primate researchers: It's the first time anyone has documented a chimpanzee wielding a carefully prepared, preplanned weapon.

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