Research on a newly rediscovered 9,000-year-old child's tooth has reshaped our understanding of Alaska's ancient people, their genetic background and their diets. The tooth is only the second known remnant of a population of early migrants known as Ancient Beringians. Combined with previous research, the find indicates that Ancient Beringians remained in Alaska for thousands of years after first migrating across the Bering Land Bridge that connected eastern Asia and Alaska.