Sharp stone technology chipped over three million years allowed early humans to exploit animal and plant food resources. But how did the production of stone tools -- called 'knapping' -- start?

Rex Watson displays two bi-face knives that he made from Oregon and California obsidian. The handles are from mule deer and elk antlers. (The Observer/PHIL BULLOCK). STORY BY DICK MASON OF THE ...

A West Texas knapping event with an artifact show and rock sale will be held from 10 a.m. to 4 p.m. Friday and Saturday at Roaring Springs to display the ancient art of creating tools out of rocks.

Randy Tedor stood with a chunk of obsidian in his right hand and a cylindrical rock in his left. He made a quick strike with the stone. It made a dull, grinding, crunching thud. A bit of obsidian dust ...

NOEL, Mo. -- Seated on a low bench, Jim Spears used a piece of deer horn to whittle down a heavy chunk of Missouri flint. For an hour, he tapped, whacked and smoothed the hard rock until it was ...