STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Flint arrowhead. Coloured scanning electron micrograph (SEM) of a flint arrowhead from the Neolithic (New Stone Age) period. Flint tools were made by chipping fragments of flint from a flint stone to create the required shape and the sharp cutting edges. The manufacture of such tools was a highly skilled craft. The Neolithic period, the last stage of the Stone Age, began around 10,000 years ago and ended when different cultures began using metal tools instead of stone tools.
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