Eureka!

You might know the story of the word Eureka. Or at least that it involves an old man in a bath. The ancient Greek scholar Archimedes reportedly stepped into his bath, noticed the water level rose. Realising that the water displaced must be equal to the volume of his foot, and that he had figured out a way to accurately measure the volume of irregular objects (which was a big deal at the time), he exclaimed Eureka! twice.

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