[muawiyah]

An easier explanation is that the proto-European population that first moved into Europe 35,000 years ago in the far North found that without pigmentation they could produce more Vitamin D and thereby survive.

Presumably they did a bit of recombinant DNA technology rather advanced for its time and ended up with clear skin, light hair, and gray eyes.

I really have no idea where those "blue" eyes came from, but I suppose it's possible they are a variation on gray.

Oh, yes, the mechanism for doing this? Without Vitamin D you get rickets ~ and presumably you fail to reproduce at a level sufficient to maintain the population.

Light skin is a uniform identifying characteristic of all Polar peoples.

[wintertime]

Light skin is a uniform identifying characteristic of all Polar peoples.
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What about the Inuit?

[Rushmore Rocks]

...........light skin is a uniform identifying characteristic of all Polar peoples...........

Aleutes? Inuits?

[Coyoteman]

I really have no idea where those "blue" eyes came from, but I suppose it's possible they are a variation on gray.

When you reduce melanin in the skin it is reduced in hair and eye color as well (if I remember my Human Races class from many years ago).

[dsc]

"Light skin is a uniform identifying characteristic of all Polar peoples."

Esquimaux?