THE FIRST HOMINIDS, using their more advanced intelligence, found in the stonework a very useful way of making tools. 

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     Using flint (pedernal, silex) and hitting one stone against the other, they sharpened the stones giving them a pointed shape, called SHARPENED STONES or HAND AXES. 

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    Some fragments removed from the stone, called FLAKES, were also used as KNIVES

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