OK, so maybe this won’t DIRECTLY help your genealogical research…but it is interesting. A recently published work based on ancient DNA suggests that Scandinavians are essentially the product of two separate migrations into Scandinavia after the last Ice Age. The article Population genomics of Mesolithic Scandinavia: Investigating early postglacial migration routes and high-latitude adaption, is a very interesting-if technical-discussion of the how modern Scandinavians came to be. The study suggests that after the last Ice Age, separate populations migrated first from the South and then from the Northeast, combining in Scandinavia.
Perhaps it is not surprising, the study also found that it was during the postglacial time period that DNA adaptations to the high latitudes created “high frequencies of low pigmentation variants and a gene region associated with physical performance.” In other words our reputation as hard working, blond haired, blue eyed (Norwegians, Swedes, Finns, Danes) goes back millennia.