America's native population arises from a single wave of Asian migration, suggest dental anthropologists

For more than 50 years, dental anthropologists have studied variation in the shape of human teeth to study the patterns of migration that people took as they populated the world. The last major continental migration event took place about 16,000 years ago, when humans first moved into North and South America. Where exactly did these people come from? How did they get there? Were there multiple waves of migration?