6 Archimedes : Archimedes was born on 287 BC, in Syracuse, Greece. He was a mathematician, Physicist, engineer, inventor, and astronomer. Unfortunately most of his work was burned in the museum of Alexandria, and only a small amount survived, but what did survive lead towards many great advances in science and technology. Archimedes was one of the greatest scientists during classical antiquity. He introduced infinitesimals, which are uncomprehendingly small numbers. This laid the foundations for calculus. He was also the first to derive an accurate approximation of pi. Unfotunately Archimedes was killed at the siege of Syracuse by a Roman Soldier, even though he was ordered to be left alive.