Archimedes: scientist who lived from 287-212 in Syracuse, was killed by the Romans under Marcellus when they took Syracuse. He helped the defenders to hold out for two years with his inventions such as huge mirrors which set Roman ships on fire. He also invented a new type of pulley, and is famous for saying that if he had a place to stand, he could move the earth. He also said ‘Eureka’, after discovering, by observing the displacement of water in his tub by his body, a way to test the purity of metals