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 (1950 film) raft and its launch from Peru. Thereafter it is a film of the crew on board, shot by themselves, with commentary written by Heyerdahl and translated. The whole film is black and white, shot on a single 16mm camera. A small amount of color footage of Kon-Tiki does exist. Kon-Tiki (1950 film) Kon-Tiki is a Norwegian-Swedish documentary film about the Kon-Tiki expedition led by Norwegian explorer and writer Thor Heyerdahl in 1947, released in Sweden, Norway, Finland, and Denmark in 1950, followed by the United States in 1951. The movie, which was directed by Thor Heyerdahl and edited by Olle