Meadowcroft?
J D Adovasio did most of the work there and has aretty good book titled, The First Americans.
However Stephen Oppenheimer (DNA) shows those people coming across Siberia 25,000 years ago and then becoming exiled during the Last Glacial Maximum.
They made it all the way around the world first. The polar people move North to South and South to North with the movement of the great herds through the cycles of the advances and restreats of the glaciers.
As they move they spread their genes.
That's why the Eskimos look so much like the Samurai clans that dominated the area around Fukuoka for so many centuries (that, BTW, is the highest concentration of Emeshi on Earth). Darndest thing ~ you could be looking for Nanuk and find Hiro.
According to the Sagas, if I read them correctly, the far more recent discovery of America saw the birth of the first baby from a mother whose own father was the High King of Ireland.