Archimedes was an ancient Greek mathematician and inventor who discovered important ideas about levers, buoyancy, and geometry. According to legend, he once jumped out of his bath shouting "Eureka!" ("I found it!") after realizing how to measure an object's volume. He was killed during the Roman siege of Syracuse, reportedly so absorbed in a geometry problem drawn in the sand that he told the soldier not to disturb it. His inventions and mathematical discoveries are still studied by scientists and engineers today.