Explorer Thor Heyerdahl's next adventure will be a trip to Easter Island to study the mystery of the island's giant stone heads. Heyerdahl, renowned for his 1947 trip across the Pacific on a wooden raft called Kon-Tiki, sets off Wednesday on a six-week expedition to examine the 30-foot-tall, 20-ton sculptured heads, which are believed to date back 16 centuries.
'It's the most interesting and different archaeological site in the world,' Heyerdahl, 71, told reporters at a news conference in Santiago, Chile. 'There is evidence on the island of a very highly developed civilization. The isolation meant there were no wars and its inhabitants could spend all their energy building.' Heyerdahl hopes to prove that early inhabitants of Easter Island -- now a Chilean possession some 1,800 miles off the South American coast -- were capable of handling the sculptures with basic methods of leveration.