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
Kon-Tiki (2012 film) roar, which can be heard from nine miles away, is taken directly from Poe's story. Although Heyerdahl did refer to "treacherous eddies" near the Galapagos, his chief worry there was that "strong ocean currents" could sweep the raft back towards Central America. The portrayal of the raft's second-in-command, Herman Watzinger, proved controversial in Norway. Colleagues and relatives say Watzinger in the film is unlike the real-life Watzinger, physically or in his actions. Actor Baasmo Christiansen acknowledged the physical differences with a smile. "Watzinger was tall, dark, and Norwegian Youth Champion in the 100 meter. He was everything I'm not." In