Heron of Alexandria

Heron of Alexandria was a Greek mathematician, engineer, scientist, and inventor born in 20 A.D. Among his inventions was the first steam engine, the vending machine, a water organ, theatrical sound effects, and the odometer. He also designed mechanical toys and wrote books on subjects ranging from geometry to mechanics. Known for his work in geometry, he even has a formula named after him: Heron’s formula, which calculates the area of a triangle.

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By Hero of Alexandria (2d copy) [Public domain], via Wikimedia Commons

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