If you look at the image in the article, 23andMe includes Scandinavia in northwestern Europe.

A surprising categorization by 23andMe certainly, but not one which detracts from my post: very few people would place Scandinavia in north-western Europe since that category implies that north-eastern Europe is an option.

> very few people would place Scandinavia in north-western Europe

Not really. I don’t presume to claim to know what “most” people think, but placing Scandinavia in north-western Europe is hardly eccentric [1, 2]. Furthermore, its history, politics and certainly its genetics are fairly intertwined with north-western Europe so it’s a sensible categorisation.

[1]: https://en.oxforddictionaries.com/definition/Scandinavia [2]: https://en.wikipedia.org/wiki/Northwestern_Europe

I see, I wasn't aware that it is normal. Agree about history, politics and human genetics (not Finland though!). I was thinking more about geography and non-human biogeography, which support north-eastern.