Polynesia of the plant in the Cook Islands have been radiocarbon-dated to 1000, and current thinking is that it was brought to central Polynesia c. 700 and spread across Polynesia from there, possibly by Polynesians who had traveled to South America and back. Thor Heyerdahl proposed in the mid-20th century that the Polynesians had migrated from the northwest coast of Canada by large whale-hunting dugouts, and from South America on balsa-log boats. Many anthropologists have criticised Heyerdahl's theory, including Wade Davis in his book "The Wayfinders". Davis says that Heyerdahl "ignored the overwhelming body of linguistic, ethnographic, and ethnobotanical evidence, augmented
Kon-Tiki Museum Another boat in the museum is the "Ra II", a vessel built of reeds according to Heyerdahl's perception of an ancient Egyptian seagoing boat. Heyerdahl sailed the "Ra II" from North Africa to the Caribbean after a previous attempt with the reed boat "Ra" failed. The Kon-Tiki Museum is situated near several other museums, including the Fram Museum; the Norwegian Museum of Cultural History; the Viking Ship Museum; and the Norwegian Maritime Museum. Kon-Tiki Museum The Kon-Tiki Museum () is a museum in the Bygdøy peninsula in Oslo, Norway. It houses vessels and maps from the Kon-Tiki expedition, as well