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

Sophisticated skull surgery Önder Bilgi talks about his discovery of a razor-sharp 4000-year-old scalpel and what it was originally ... We have just found two cutting blades made of obsidian, ...

Properly knapped obsidian blades, when new, are 300 to 500 times as sharp as a surgeon’s scalpel, says Mr. Schindler.

In fact, obsidian tools continued to be used throughout the ancient Middle East for millennia beyond the introduction of metals, and obsidian blades are still used today as scalpels in specialised ...

An obsidian blade found at least 80 years ago turned out to be a nearly 500-year-old artifact left by explorers in the Texas Panhandle, a new study said. Photo from Southern Methodist University ...

An obsidian blade found at least 80 years ago turned out to be a nearly 500-year-old artifact left by explorers in the Texas Panhandle, a new study said. Photo from Southern Methodist University ...