How did the people on the island migrate there?

Ancient DNA tells us that the migration tide in the United States has a similar story. About 12000 years ago, the same technology began to appear throughout North America. People named it Clovis civilization after the place where it was first discovered-Clovis, New Mexico, USA. The most striking feature of Clovis civilization is those huge and beautiful spearheads. Clovis's spearhead was used to hunt mammoths, and it may also be used to hunt other animals that appeared in the late Pleistocene. Clovis's spearhead was used for hundreds of years, and then it suddenly disappeared with the disappearance of mammoths. This shows that Clovis people were the first people to reach America. They came across a blank continent, a continent full of prey, all the way south from an ice-free corridor on the Laurentade ice sheet (which covered most of Canada and the northern United States today). They quickly spread out and hunted giant animals. When these giant animals became extinct, Clovis civilization also disappeared. Clovis split into hundreds of follow-up groups and eventually became today's Native Americans. All South American aborigines share a common ancestor with them, while only about 80% of North American aborigines share a common ancestor with them. This shows that although Clovis people are the ancestors of most Native Americans, there was a population bottleneck shortly after they arrived in the American continent, thus cutting off the gene flow between North and South America. Native Americans are the direct descendants of the first ancient Indians who landed in America. In North America, the ancestry of ancient Indians was slowly diluted by later immigrants. These later immigrants include those who brought Inuit ancestors to the Arctic Circle.