Migration of Native Americans

             The three most plausible reasons that the Native Americans crossed the Bering straight is the ice bridge, land bridge, Continental shelf. The ice bridge is when the water froze and the Native Americans just walked across. The land bridge is where the ocean level dropped 300ft because the glaciers where freezing up all the water then they walked across. The Continental Shelf is basically the same thing as the land bridge except less of the water froze. Personally I believe in the land bridge Theory because it seems the most plausible to me because it would be very easy to walk across the land after it froze.


 picture from: http://en.wikipedia.org/wiki/Native_Americans_in_the_United_States