First Americans: Pre-Clovis Projectiles Hint At Multiple Migrations

Thousands of artifacts from a site in Central Texas, including a dozen projectile points, have provided researchers with new clues about the arrival and spread of First Americans on the continent. The items, which are up to 15,500 years old, hint that the Americas may have been populated in multiple waves of migration via different routes.
In the long-simmering debate over when and how humans arrived in the Americas, there are few things researchers can agree on. Paleogenetic stud