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 (Scouting) Challenge", "Spare Time Activities", "Dress-up competition" and others. The 2015 theme was "Here be Dragons". Kon-Tiki events have also been held in Port Elizabeth in the Eastern Cape. In 2012, Scouts Australia (SA Branch) ran the first Kon-tiki Raft Challenge outside South Africa. The competition was based on that of the South Africans. Kon-Tiki (Scouting) Kon-Tiki refers to Scout and Guide raft-building competitions held by Scouts South Africa and Scouts Australia. Named after Thor Heyerdahl's Kon-Tiki expedition of 1947, teams of Scouts and Guides age 11 to 17 compete to build and live on a raft for a weekend. Support