What's the sharpest knife on earth?
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Mar22-07, 04:18 PM
It's hard to believe but the sharpest knives that have ever been used in recent years were mounted with stone flakes made of obsidian. A company called Aztecnics was manufacturing and selling surgical scalpels mounted with different sizes and shapes of obsidian blades. Good quality obsidian fractures down to single molecules which can produce a cutting edge 500 times sharper than the sharpest steel scalpel blade ("American Medical News", Nov. 2, 1984:21). On the cellular level an obsidian knife can cut between cells rather than tear the cells as a steel knife will do. A sharper cut will allow a wound to heal more rapidly with less scarring. High magnification of a steel scalpel blade edge looks like a serrated saw blade but an obsidian edge looks smooth.
I'm not sure of the accuracy, but the guy certainly seems to know his stuff.