Like most human traits, blue eyes are determined by genes, and no two people have exactly the same hue. It works a lot like individual fingerprints, making our eyes two of the most distinctive parts ...

From iconic historical figures to Hollywood stars - blue eyes have always been 'in'. Yet, few will have guessed they originated in this small corner of Europe.

Blue eyes have been around for at least 7,000 years but we still don't know exactly why they evolved. Brad Pitt has them, Paul Newman had them — but when it comes to the human population as a ...