Scientists believe that humans crossed the land bridge over the Bering Strait and entered the Americas for the first time between 23,000 and 30,000 years ago. Beyond that, the details of this migration are uncertain, as is exactly when and how these early arrivals dispersed across North and South America. A recent study based on human remains found at an ancient fishing camp in Alaska sheds new light on these questions, and suggests ancient North American society was more diverse than previously thought.