"According to folklore, Polynesians originated from a mythical homeland called Hawaiki. Their origins and the existence of such a place, however, have been the subject of much speculation. In a new study in the premier open access journal PLoS Biology, Jean Trejaut and colleagues now provide the first direct evidence for the common ancestry of Polynesians and indigenous Taiwanese" (Source: ScienceDaily News) This is an old story (2005), but still interesting because it shows, among other things, that the Taiwanese aborigines must have had fairly advanced ocean-navigation skills.
The populating of Oceania has always been a mystery. I find it hard to believe that people back then would just sail off on an unknown ocean looking for unknown lands, especially since they couldn't know that they would find anything. Considering the size of the Pacific Ocean, that would be a death sentence. It's possible that these aborigines discovered various islands in the course of fishing expeditions near their own shores, but how did they get to Polynesia? French Polynesia is over 6,000 miles from Taiwan. Still, it looks like this is what happened. Language studies have also confirmed the connection between Polynesia and Taiwan.