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http://news.bbc.co.uk/1/hi/sci/tech/6387611.stm
http://news.bbc.co.uk/1/hi/sci/tech/6387611.stm
Chimpanzees in Senegal have been observed making and using wooden spears to hunt other primates, according to a study in the journal Current Biology.
Researchers documented 22 cases of chimps fashioning tools to jab at smaller primates sheltering in cavities of hollow branches or tree trunks.






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