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 ...

We created the world's sharpest obsidian knife, which outperforms a scalpel, using a 60,000 PSI waterjet to craft an ...

We got a fun package and idea in the mail a while ago, it was two large obsidian rocks. In the last obsidian video we cut it into a cube. This time we decided to do some waterjet cutting and make a ...

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 ...