Scientists reckon that they have cracked the case - and apparently, it's all down to one single person. It turns out that ...

Astonishingly, all but one had identical genetic sequences in the relevant part of the OCA2 gene. "This strongly indicates that all blue-eyed individuals are linked to the same ancestor," said Dr.

Blue eyes are caused by a gene mutation. For years, researchers had searched for it on the OCA2 gene. The OCA2 gene determines how much brown pigment is in our eyes. But what they were looking for ...

Blue-eyed people have a higher risk of melanoma ... chief among them the OCA2 gene. The HERC2 gene is another that plays an ...