Obsidian – a type of volcanic glass – can produce cutting edges many times finer than even the best steel scalpels. At 30 angstroms – a unit of measurement equal to one hundred millionth of ...

Sharpness, though, is the main draw. “If you look at a surgical scalpel and a fresh obsidian flake under a microscope, the obsidian edge makes the surgical scalpel look like a dull ax,” Dr ...

Obsidian, naturally occurring volcanic glass, is smooth, hard, and far sharper than a surgical scalpel when fractured, making it a highly desirable raw material for crafting stone tools for almost ...

Önder Bilgi talks about his discovery of a razor-sharp 4000-year-old scalpel and what it was originally used for At an early Bronze Age settlement called Ikiztepe, in the Black Sea province of ...

Jamie Hale/The Oregonian Obsidian is a dark, natural glass, formed when lava cools without crystallizing. Humans have used it for pottery, arrowheads and even surgical scalpels. It's not exactly ...

A greenish obsidian blade, believed to have been found on the Texas Panhandle, may be from the 16th-century expedition led by the Spanish explorer Francisco Vázquez de Coronado, a new study suggests.