Before the Cro-Magnon Homo sapiens migrated to Europe, where did they come from? And what did they look like before the European climate affected them?Cro-Magnon were the first Homo sapiens to enter Europe. Their Y-haplotype is I, which is sister to J, the haplotype of the SW Asian Semitic speakers. The Berbers also came out of the Mideast and are related to these 2.
Cro-Magnon are the ones who interacted with neandertals in Europe. It is still argued whether they were violent against them or just out-competed them for resources. They are the ones who made the famous cave paintings such as at Altamira, Spain and Lascaux, France. The proliferated for a while and then another glacial episode forced them into refuges in Iberia, the Italian Peninsula and the Balkans. When the climate warmed again, they again spread northward to repopulate Europe.
They form the base of the European population. They were mixed with later immigrants, including Neolithics from the Mideast carrying haplotypes J (Mideast), G (Caucasus) and E (African, from the Natufians). Later Aryans, haplotype R, entered.
Today pureblood Cro-Magnon descendants are found mostly in the West, such as in central Ireland, Wales and places in the mountains of northern Iberia.
And how do you know all this? Did you study this in university? I want to make sure you're a credible source.