He was a greek mathematician. he had a sharp mind. his famous principle is about what happens to an object when you put it in water and what happens to the water. the famous story about him is that he discovered his principle while he was sitting in the bath. in fact, it took him many years to prove it. one day he was trying to tell hiero, the king of syracuse, that his gold crown was not all gold. when he put the crown in a bowl of water, it didn’t displace enough water – it wasn’t heavy enough to be gold. hiero got awfully angry. the man who made the crown went to prison