What kind of blows my mind about that is people left somewhere really warm, went past places that were equally warm and fertile, went past areas that were less warm and still fertile, then kept going until they hit essentially the end of the earth and settled in a wet, cold place where it's difficult to grow much of anything and decided to stay there. Also wondering how many generations did it take them to lose all their pigmentation when it was obvious that they wouldn't see the sun often, or have things like seasoning other than salt. Maybe it was a convoy of people that were really not fun at parties (until they discovered whiskey).
Not quite as confusing about people like the early Innuit and others that settled in the Artic tundra areas, but how bad were things that you just kept going and needed to figure out how to survive in such brutal conditions?
Plus lots of evidence there was competition between homo sapieans and neanderthals, as well as inter-species breeding, so kind of fascinating to think about.