Many present-day Asians and Native Americans are related to humans living some 40,000 years ago in the area near Beijing, an analysis of ancient DNA shows.
A genetic analysis has shown that Northern European people are a mixture of two very different ancestral populations - and one of these populations is related to Native Americans.
A detailed genetic analysis has settled the question of how and when the first Americans arrived in the continent.
Native Americans can trace their origins to a remote mountainous region of Siberia, new genetic research has shown.
It seems that native Americans made it to Iceland long before Christopher Columbus crossed the Atlantic the other way.