Obsidian is a volcanic glass used to make tools for Stone-Age man – and for modern surgeons.

We all love our knives. Each of us owns several of them for various purposes and they're the most indispensable tools that we carry. So the idea of making blades from stone may seem primitive and even ...

Archaeologists found 16 knives made from flint and obsidian of a type that were used in sacrifices by the ancient Maya.

Fragments of muscle, tendon, skin and hair on 2,000-year-old stone knives are first conclusive evidence of human sacrifice.

Over the last 11,500 years or so, the stone has been fashioned into deadly knives, razor-sharp spear points, darts for atlatls, or spear-throwers, and arrowheads.

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 used for hu ...

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There are even some doctors who operate using stone bladed knives made of obsidian on their patients to this day. After moving to Seattle in the 1990’s, his hobby of carving knives which started at ...

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 ...