Here is the unpopular theory: most expansion was on skinboats via the Arctic Ocean: http://www.paabo.ca/uirala/uini-seagoingskinboats.html http://www.paabo.ca/u

Here is the unpopular theory: most expansion was on skinboats via the Arctic Ocean: http://www.paabo.ca/uirala/uini-seagoingskinboats.html http://www.paabo.ca/uirala/uini-seagoingskinboats.html Bering route not needed.