Theory of the common ancestry
Famous Norwegian explorer Thor Heyerdahl wanted to test the legends and sailed the Kon-Tiki, a balsa-wood raft, from South America into the Pacific in 1947. By that expedition Thor tried to show that humans could have settled Polynesia from the eastern shores of the Pacific Ocean, with sailors using the prevailing winds and simple vessels.
Soon by using DNA, linguistic and archaeological evidence, scientists began to realize that the Austronesian-speaking peoples, including the Polynesians, probably originated from islands in eastern Asia, possibly from Taiwan, and moved southwards and eastwards through the South Pacific Ocean. The common ancestry of all the Austronesian languages supports this theory. At least some of the migration occurred against the prevailing winds and was deliberate migration rather than just accidental. Austronesian and Polynesian navigators may have deduced the existence of uninhabited islands by observing migratory patterns of birds.The possibility of such migration seems more likely in the view of recent research. More and more boat builders construct vessels by using traditional materials and techniques, sail them using ancient navigation methods.