Total change of evolutionary theory.

[alien space marine]

If Hitler had killed every non-blond-haired-blue-eyed person in the world, would that constitute an evolution even though it was caused by a human? I wouldn't exactly call that "natural" selection, after all.

Yeah, I have nothing intelligent to contribute...

...

...ever. :)

Technically he'd have to kill himself to accomplish that :p

{Lazyfatbum} But beyond that, a dark polar bear, until recently, hasn't been found. I believe it might be safe to say that its only being found now because of the new generations that have been out of their snowy environment for so long. A mutation of that gravity is unheard of, spots sure. I've seen polar bears with pink noses, spotted noses, etc but an entirely new coat?!? And it just 'happens' to match the environment?

Polar bears evolved from the Brown Bear , If a dark polar bear appeared it would be the result of a recessive atavistic gene.