North America’s Oldest Known Footprints Point to Earlier Human Arrival to the Continent
New dating methods have added more evidence that these fossils date to 23,000 years ago, pushing back migration to the Americas by thousands of years
smithsonianmag.com/science-nat

Are there any scientifically calculated opinions on how long it would have taken small bands of people to move from Alaska to NM?

I would guesstimate something like 50 generations. People would move rapidly through areas with few resources, stay put for a while where food & water were plentiful.

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