The exclamation “Eureka!” is traditionally attributed to the ancient Greek mathematician and inventor Archimedes of Syracuse, in the famous story of his bath-time discovery about buoyancy and gold purity.

Who said “Eureka” first?

  • Most historical and linguistic sources credit Archimedes as the first person reported to have exclaimed “Eureka!”.
  • In the legend, he shouted “Eureka! Eureka!” (“I have found it! I have found it!” in Greek) after realizing that water displacement could reveal whether a crown was pure gold.

The story behind it

  • King Hiero II of Syracuse allegedly asked Archimedes to determine if a crown was pure gold without damaging it, which posed a serious puzzle.
  • While getting into a bath, Archimedes noticed the water level rising and realized that the volume of displaced water equals the volume of the submerged object, giving him a way to test the crown’s composition—he was so excited he supposedly ran through the streets naked, shouting “Eureka!”.

What “Eureka” means

  • “Eureka” comes from ancient Greek εὕρηκα (heurēka), meaning “I have found it!”.
  • Today it is used in English as a celebratory cry for a sudden discovery or brilliant idea, directly inspired by Archimedes’ legendary moment.

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