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 ...

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 ...

Many a bison and caribou fell to spears and arrows tipped with obsidian, which can be worked sharper than a scalpel. A few years after the find in the Nogahabara Dunes, archaeologists Dan Odess ...