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
Heyerdahl Award academia, science, government, NGO’s and the maritime industry. It is possible to submit nominations online at www.heyerdahlaward.com. The Thor Heyerdahl Environmental Award is additionally supported by Guard, Skuld, Det Norske Veritas and Trade Winds. Heyerdahl Award The Thor Heyerdahl International Maritime Environmental Award was established in 1999 by the explorer and scientist Thor Heyerdahl (1914–2002) and the Norwegian Shipowners' Association. The prize recognizes candidates from the shipping industry that have made an outstanding contribution to the environment. To qualify for the award, candidates must have demonstrated exceptional technical innovation and environmental work in correspondence with Thor Heyerdahl’s spirit for the