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New Sourcing Technique Detects Obsidian In Seconds
2013-09-10 09:27:02

April Flowers for redOrbit.com - Your Universe Online Obsidian is a naturally occurring volcanic glass with a smooth, hard surface. It is far sharper than a surgical scalpel when fractured, making the glass a highly desirable raw material for crafting stone tools for almost all of human history. Found in East Africa, the earliest obsidian tools are nearly two million years old, and today, doctors still use obsidian scalpels in specialized medical procedures. The chemical composition of...


Word of the Day
malpais
  • The ragged surface of a lava-flow.
'Malpais' translates from Spanish as 'bad land.'