This story has been going around for ages.
It is no secret that the first Americans pre-dated the ice age by quite a bit.
But there really isn’t much evidence to support what these stories day.
But...something happened that released such a torrent that it literally stripped the southwest of its topsoil and eroded huge areas of land.
Anyone flying over that area can see it, if they bother to look. And what you see is not erosion over millions of years—but erosion over a much shorter time, and of a flow pattern that reads huge, sudden, and short.
If there were people living in that area, they might have high-tailed it to higher ground for safety. It might be why they are called “Ant People”—living in the walls of the canyon like an ant hill.
Almost like a huge flood went thru there, huh?
I think it is possible that at one point, the earth was 90 degrees off from it’s current poles... meaning that antarctica was about where the middle of the atlantic is now and was easily traversed with older boats between the southern tip of Africa to Antarctica to South America.
The entire trip would have been more temperate as well. Either the deep oceans at the top and bottom created larger ice caps that made the rotation of the earth wobbly or a meteor hit that was big enough to cause the change.
A biblical flood perhaps?
Ice age after, then a big melt? That would explain a lot.