Hyperboreans?

There exists an obscure history or prehistory of "Hyperboreans" which is now supposedly only talked about by "cranks," yet some of it seems real. It almost makes one believe that there are conspiracies against it.

In any case, following a real cataclysm brought on by various cycles of the last ice age, the Hyperboreans and their prehistorical perennial "pagan" religion were eventually passed down culturally and genetically in great migrations to all points south, later somehow developing into the Germanic, Latin, Celtic, Baltic, Vedic, Iranian, Sumerian, Egyptian, and even to South American civilizations, all of which have legends of the Hyperboreans. In the legend, "Atlantis" was one of the main stopping off points of the Hyperborean migration. 
 
Could it at least be hypothetically possible that Hyperboreans, living around the Arctic Circle on top of the world, were in contact with extraterrestrial cultures, as suggested by some? Could there have been interbreeding? I doubt that part of the legend; evolution could certainly have accounted for the Hyperboreans.

In any case, my crackpot prediction is that the great discovery of material evolution will eventually transform all religions, perennial, pagan, traditionalists, Hindu, Christian, and otherwise (but need not reject them ) in a great new "migration," by reconstructing a supermaterial, not spiritual, Godhood as evolved to in the material and supermaterial world, as described in the philosophy of "theological materialism."