Cave paintings have been found that depict prehistoric people shaving with shells, flint knives, and shark teeth. Later on, some cultures would shave with circular gold or copper razors, while others used sharpened blades of obsidian glass. The familiar, hoe-shaped razor wasn't invented until 1847.
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Key Facts In This Video
Native Americans made arrowheads, knives, and other tools from obsidian. 00:29
Watch Mike Cook break blades of obsidian off from a large obsidian core: 01:51
Watch Mike Cook shave his face with an obsidian blade: 02:56