Polynesian navigation snow. In the mid-20th century, Thor Heyerdahl proposed a new theory of Polynesian origins (one which did not win general acceptance), arguing that the Polynesians had migrated from South America on balsa-log boats. The presence in the Cook Islands of sweet potato that is a plant native to the Americas (called "kūmara" in Māori), which have been radiocarbon-dated to 1000 CE, has been cited as evidence that Americans could have traveled to Oceania. The current thinking is that sweet potato was brought to central Polynesia circa 700 CE and spread across Polynesia from there, possibly by Polynesians who had traveled
Erik Hesselberg Erik Hesselberg Erik Bryn Hesselberg (4 June 1914 – 15 September 1972) was a Norwegian sailor, author, photographer, painter and sculptor. He is most known as a crewmember of the Kon-Tiki raft expedition from South America to French Polynesia in 1947. Erik Hesselberg was born at Brevik in Telemark, Norway. He grew up at Larvik in Vestfold. He knew Thor Heyerdahl from his childhood years. Having graduated from his secondary school, Erik Hesselberg went on to a sailors' school and later worked as a professional sailor for five years, making several trips around the world. Later Hesselberg studied art in