Thor Heyerdahl gained worldwide fame when he crossed the Pacific Ocean on Kon-Tiki in 1947. He followed this up with spectacular expeditions on the reed boats Ra and Tigris. His recreations of prehistoric voyages showed that early man had mastered sailing before the saddle and wheel were invented. His reputation as a scientist was consolidated through his archaeological excavations on the fabled, mysterious Easter Island. Curiosity was Thor Heyerdahl’s driving force.