My ancestors came across the Bering Strait.
By the time they got to the Four Corners, they mythologized it as us emerging from below (worlds 1-3) into the Fourth World.
Anyways...back to the article.
Sorry to ask a dumb question, but what four corners do you mean? I can only think of Utah, Ariz. etc., but I doubt they mythologized those four corners ;-)
The Bering Strait crossing happened more than once as well. The main impediment is that a lot of “my professor said it, I believe it” is from landlubbers who like stuff cut and dried.
When I had my DNA done it said, “<1 Native American”. Turned out to come from my archaic Siberian roots, IOW, common ancestry with people who later crossed the Bering Strait. :^) The remaining descendants occur in eastern Canada, because a group that came in later pushed them across the continent.