Dawn of the Hyperborean Era, pt 1

For a possible TARDIS-based kitchen sink campaign, I've been adapting setting stuff for several periods of Terran spacetime that interest me. 

Approx. 800,000 BP - 130,000 BP

After the reign of Homo erectus, a species of man called today Homo heidelbergensis, known to the cultures of the Hyberorean Era (Sangamonian/Eemian Interglacial) as Antehumans, and calling themselves (placeholder), evolved in the icebox Europe of the Wolstonian. They achieved a sophisticated social culture and mastered the sciences known to Homo sapiens as magic, but did not achieve a material culture that would be recognizable to the archaeologists of the Arbitrary Present as anything more than middle stone age technology.

The population quickly dispersed around the globe. In the glaciated north, they grew compact and hairy, while in the baking south, they grew tall and smooth. There was frequent movement between the populations, so that it was not uncommon for the upstart H. sapiens and H. Neanderthalensis who arose in the Antehuman's twilight to see a blocky, rude northerner in the Sahara or a towering southerner on the ice. Memories of the senescent Antehuman species have morphed 200,000 years later  into the dwarfs and elves of folk memory. The antehumans of Asia settled in Mu (known to the Elder races as R'lyeh) and in Lemuria, driving the more primitive H. erectus into the hinterlands of mainland Asia. The rotation of the Terran hypersphere led to the catastrophic destruction of Mu in 165,000 BP.

For our purposes, we are concerned only with the Antehumans of Thule and Hyperborea. Thule is the translation of the name the Hyperboreans gave to Scandinavia, while Hyperborea was their name for Greenland. The Antehumans shared their subarctic lands with the diverged hominids known as the Voormis, the inhuman Jeelo, and the degenerate Voors. It was from the Voormis that the Antehumans, and subsequently the Hyperboreans, learned the worship of Tsathoggua. The Jeelo are ill-attested by Eibon, and thus little known in the Arbitrary Present. The Voor predate even the Antehumans in Thule. Voor delving uncovered much from the pre-hominid cultures, becoming a species corrupted by too much knowledge too soon. Their wars with the northward immigrating Antehumans drove the isolated "low" Voor tribes into the uttermost, desolate north, where they would evolve into the cannibal Gnoph-Keh, and the "civilized" Voors underground into "Deep Dendo". Over the millennia, these have become squirming albino burrowers, barely sapient, and reminiscent of the Crawlers from 21st century horror film The Descent. Their Voorish Domes still stand, tantalizing adventurers into the deep caverns and an inevitably horrific death.