Siberian ancestry and Y-haplogroup N1c spread across Northern Europe rather late in prehistory (Lamnidis et al. 2018 preprint)

A claim often made in popular culture is that the Saami people of Fennoscandia and Northern Russia are the last indigenous Europeans. I saw some guy blurt this out on a random cooking show the other day. But it's been obvious for a while now, thanks to analyses of modern-day DNA, that the Saami, and indeed almost all other Uralic-speaking groups in Europe, have a somewhat more complex population