Eureka

Legend has it that: During Archimedes's life, a king consulted him to find out whether or not his crown was made of pure gold. Archimedes pondered of this question for a while. One day, when he went to the bath houses, Archimedes noticed that the water level rose when he submerged his body. this gave him such an inspiration that he ran out of the bath house and through the streets yelling "Eureka, Eureka" which means "I've got it, I've got it". He was happy that he forgot to put on and clothes!