In recent years, the first-Americans debate has focused on pre-Clovis evidence for human settlement. Fortunately, the academic temperature has cooled somewhat. A new generation of long-term, multidisciplinary research is slowly replacing the often far-from-rigorous fieldwork of yesteryear, and paying rich dividends. Now researchers are putting their weight behind an exciting and provocative scenario for the first settlement of the Bering Land Bridge between Siberia and Alaska. The Beringian standstill hypothesis is based on years of highly specialized, fine-grained research by scholars from many disciplines and from both sides of the Bering Strait and further afield.
http://www.sapiens.org/archaeology/bering-land-bridge-first-americans/