|This older map does indicate the origins of Native Americans as coming from Western Europe (Spain)|
The alternative route directly across the Atlantic is actually much easier to believe
"Great Surprise"—Native Americans Have West Eurasian Origins
Oldest human genome reveals less of an East Asian ancestry than thought.
Prevailing theories suggest that Native Americans are descended from a group of East Asians who crossed the Bering Sea via a land bridge perhaps 16,500 years ago, though some sites may evidence an earlier arrival. (See "Siberian, Native American Languages Linked—A First .")