Kon-Tiki was the name of the balsa wood raft which was used to cross the Pacific Ocean in 1947 in a journey of 8, 000km (4, 900 miles).

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Using balsa wood and other materials that would have been available in antiquity, Mr Heyerdahl built the Kon-Tiki, named after a mythical South American king said to have been fleeing for his life, and launched her from Peru.

ECONOMIST: Thor Heyerdahl