this post was submitted on 18 Apr 2026
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Map showing frequency of red hair across Europe. Five color-coded ranges: red (over 10%) concentrated in Ireland and Scotland, orange (5-9%) in parts of UK and northern Europe, brown (2-4%) in Scandinavia and Germany, darker brown (1-2%) in central Europe, and darkest brown (under 1%) in southern Europe. Shows clear north-south gradient with highest concentrations in Celtic regions.

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[–] SpaceNoodle@lemmy.world 27 points 4 weeks ago (2 children)

Thanks, this helps me with my travel plans

[–] blarghly@lemmy.world 7 points 4 weeks ago
[–] CanadaPlus@futurology.today 1 points 4 weeks ago (1 children)

You going rainy and depressing, or Russia?

[–] SpaceNoodle@lemmy.world 1 points 4 weeks ago

I live in Seattle, so Russia is worse

[–] blarghly@lemmy.world 18 points 4 weeks ago (3 children)

Okay, questions:

  • Why is Ireland split like that?
  • What's up with the hot spot on Russia?
  • Whats going on with all the light blue splotches? That color isn't on the legend, and it seems oddly specific for "no data"
[–] bestboyfriendintheworld@sh.itjust.works 27 points 4 weeks ago (1 children)

The light blue splotches are lakes.

[–] blarghly@lemmy.world 21 points 4 weeks ago

That makes more sense. But not as much sense as making them the same color as the ocean.

[–] hitmyspot@aussie.zone 9 points 4 weeks ago (1 children)

Looks like radius from Belfast and Dublin, the big cities, which had more immigration from the uk. However, that doesn’t explain north versus south which should skew differently if that was the case.

[–] Skua@kbin.earth 9 points 4 weeks ago

The southern part is Cork, the second biggest city in the republic. Dublin and Cork are where Norse and then British settlement was most concentrated over time as well

[–] adoxographer@feddit.dk 5 points 4 weeks ago

Maps without sources are like blondes with dyed red hair.

[–] Valmond@lemmy.dbzer0.com 2 points 4 weeks ago (1 children)

Okay, plz explain. We all want to know.

[–] bestboyfriendintheworld@sh.itjust.works 12 points 4 weeks ago (2 children)

Probably related to dark winters, cloudy weather, low melanin levels, and genetic isolation on islands.

I’m just guessing the following:

Trade and shipping from the British isles across the North Sea to the Baltics also moved people along those routes.

The red center in Russia might be due to Viking settlement and establishment of Rus.

Blond and blue eyes have a high distribution around the Baltic Sea mostly due to similar reasons.

[–] CanadaPlus@futurology.today 2 points 4 weeks ago* (last edited 4 weeks ago)

That's nowhere near Rus (if the Viking thing even happened). It's a particular Finnic population.

[–] Valmond@lemmy.dbzer0.com 1 points 4 weeks ago (1 children)

I mean why is there this spot in russia :-)

[–] BenM2023@lemmy.world 1 points 4 weeks ago (2 children)

Because the Vikings settled and formed The Russians around Ukraine, from where they spread and eventually formed Russia.

[–] Valmond@lemmy.dbzer0.com 2 points 4 weeks ago (2 children)

But what about that red head spot?

There must be some (maybe forgotten) wild story about it

[–] Skua@kbin.earth 3 points 4 weeks ago

I think that's Udmurtia. Udmurts are an Ugric minority people within Russia, and they've got a really high incidence of red hair

[–] CanadaPlus@futurology.today 1 points 4 weeks ago* (last edited 4 weeks ago)

Somebody with red hair had a lot of children there right before the population suddenly grew. Or maybe was one of the survivors when it regrew after a national disaster. The founder effect, in other words.

Other people are talking about selection. The numbers are in, that accounts for maybe 5% of genetic change over the last 10,000 years. The rest is just chaos.

[–] CanadaPlus@futurology.today 1 points 4 weeks ago

That's closer to Khazakhstan.