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Until now, the most widely accepted hypothesis about the settlement of America was that which indicated that the first people crossed from Asia to America through an old land bridge between Siberia and Alaska (the Bering Strait), waiting for two huge sheets of ice that covered all of Canada to begin to recede.
However, these days a study has been published in the journal Nature, carried out by an international group of researchers led by Eske Willerslev, an evolutionary geneticist at the GeoGenetics Center of the University of Copenhagen and the University of Cambridge, who using ancient DNA that drew from a crucial point of this corridor, has knocked down this theory.
Through DNA, the scientists were able to create a complete picture of how and when both flora and fauna emerged in this region in that particular period, concluding that humans may have traveled the Bering Strait some time ago. 12,600 years, but what before it was really impossible to do it not having basic resources such as wood (useful for fuel and tools), or animals since they were their source of food.
Willersley has commented that 'The conclusion is that although the physical corridor was open for 13,000 years, it was not possible to use it until several hundred years later.«.
If this theory is confirmed, the first Americans would not have come through the Bering Strait since they had been present on the continent long before, so they must have reached it by other means, the most accepted being that of the Pacific coast.
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