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 ...

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?

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.

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 ...