The picture of the founding of the Americas is still being assembled, one ancient genome at a time.

Why Alaska Is The Key To Understanding Everything That Came After

The importance of the Upward Sun River site — and of Alaska more broadly — for understanding the founding of the Americas cannot be overstated.

Alaska is where the story begins, in a geographic sense, and the ancient genomic record of Alaska is the closest thing we have to a direct window into the founding population before it spread across the hemisphere.

The founding population of the Americas entered from the northeast — from Beringia, across the land bridge that connected Asia to Alaska when sea levels were low.