Ahead of their time: An ancient group in Africa used heat to create sharper tools 70,000 years ago
We might imagine cave men crudely making tools out of rocks, but Middle Stone Age man might in fact have been an innovative artisan.
New evidence suggests some early humans placed rocks into hot embers before shaping them into blades in order to make them harder and more precise.
This clever tool-making technique may explain why one group in southern Africa was so successful around 70,000 years ago.
WHAT ARE THE ADVANTAGES OF HEATING STONE? The advantages of heat treating the silcrete rock were many.
It facilitates knapping - chipping of pieces of stone by striking it - because it reduces... read more
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