How did the first people on North America get there? What's the archaeological evidence?
   Katrina, Web Post

Dr. dig responds:
There's a lot of evidence to suggest that the first Americans walked from northeastern Asia into Alaska! They could do this because the two continents were once connected by a land-bridge across the Bering Strait. The people, who were hunter-gatherers, then moved slowly southwards, following their food supplies, and as they moved they dropped the tools and established the settlement sites that allow us to track their movements. Archaeologists are not sure exactly when this happened. We have dates for early American sites of about 14,000 years ago, but some experts believe that it may have happened much earlier, perhaps as early as 28,000 years ago. Many archaeologists are now doing DNA analysis to figure out exactly when this happened.