All the way back to 6200 BC, and probably before that, humans made mirrors. In Turkey, they polished obsidian; in Egypt, copper. Over at Smithsonian, beloved Boing Boing contributor Clive Thompson explores the technological and cultural history of the mirror. From Smithsonian:

During the medieval period in Europe, paintings of vice would include women gazing into hand mirrors while the skeletons of demons lurked behind them.

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