Now it is clear that Homo Sapiens arrived in Northern America from Siberia via Alaska using a corridor after the peak of the Ice Age and “maybe” before the peak of the Ice Age. The Clovis theory is dead. We are dealing with between 25,000 and 20,000 years ago, and open before 25,000 years ago.
But in Chile they are working on a site that would go a lot farther back and would be the tip point of the South Pacific migration that supposedly stopped on Easter Island. And that migration bringing with it stone work would explain a lot better the systematic building of cities, etc., by Incas, Aztecs, Mayas, and some others not going beyond maybe New Mexico and the troglodyte pueblos, and we could think it is in fact the contact point between the two migrations, a sort of compromise.
Extraterrestrials? My foot, yeah! Homo Sapiens emerged some 200,000 years ago by inventing articulated language and the subsequent development is thus a lot older and longer than the extraterrestrial addicts think or state. Migrations started in the same period and we still have to discover things in Southern Africa. The real first migration out of black Africa is the Semitic migration north down the Nile, west along the Mediterranean coast, across to Crete (but it was an impasse) and for a short period of time east to the Levant (up to 80,000 years ago and again after 35,000 years ago) though definitely into the Arabian peninsula.
We do not need any extraterrestrials or whatever Watchers some invoke. Just plain Homo Sapiens migrating.