Blondes

According to a story at The Times Online, being blonde is an evolutionary adaptation.

According to the study, north European women evolved blonde hair and blue eyes at the end of the Ice Age to make them stand out from their rivals at a time of fierce competition for scarce males.

But what's really interesting is this bit at the end.

A study by the World Health Organisation found that natural blonds are likely to be extinct within 200 years because there are too few people carrying the blond gene. According to the WHO study, the last natural blond is likely to be born in Finland during 2202.

Something must be done! Really, by then it's likely we'll have mastery of the genes for that sort of thing and won't need hair color.

Note1: Different spells checks return different results for "blonde".
Note2: Searching Google pictures for "Natural Blonde" doesn't return kid-friendly results.