It is the first conclusive evidence of use of stone implements in human sacrifice. Experts in Mexico have found blood cells and fragments of muscle, tendon, skin and hair on 2,000-year-old stone ...

DeeDee Evans, left, of Lehi, talks to Mark Sullivan, center, and Mindy McWaters, right, about how to get started flint knapping at the monthly meeting of the Utah Valley Knapping Association at the ...

MEXICO CITY – Traces of blood and fragments of muscle, tendon, skin and hair found on 2,000-year-old stone knives have given researchers the first conclusive evidence that the obsidian blades were ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. From card [referring to all 12 knives ...

Ever had a headache so big, you felt like drilling a hole in your head to let the pain out? In Neolithic times, trepanation – or drilling a hole into the skull – was thought to be a cure for ...

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 ...

We collaborated with NFTI to produce the world's sharpest obsidian knife, achieving performance that surpasses traditional scalpels. Utilizing 60,000 PSI waterjet technology, we crafted an ...