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Making an obsidian knife: The edge of an obsidian fracture can be as little as one atom thick, meaning it can be many times sharper than the finest steel scalpel (not my video)

Making an obsidian knife: The edge of an obsidian fracture can be as little as one atom thick, meaning it can be many times sharper than the finest steel scalpel (not my video)

Video Credits to: u/Bucephalus_326BC

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