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The sharpest razor blade in the world




Mike Cook, a researcher rocks, shows us how could someone be shaved before the invention of the metallic razor, using the sharpest blade in the world. The blade is made of Obsidian, a volcanic rock created by the rapid cooling of lava and can have a ridge so thin, as a particle. Ancient civilizations used Obsidian to build sharp knives and arrows.

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It's called Obsidian….ochi obsidian