Like most human traits, blue eyes are determined by genes, and no two people have exactly the same hue. It works a lot like ...

The 'hardest logic puzzle in the world' has left many utterly baffled, with scores of people throwing ... 101 brown and 99 blue. Or 100 brown, 99 blue, and he could have red eyes.

A team of scientists has found a way to unlock a color that doesn't exist in the natural world. Named "olo," this new shade ...

All blue-eyed people have one ancestor in common, born around 6,000 to 10,000 years ago. Blue eyes are caused by a gene mutation. For years, researchers had searched for it on the OCA2 gene.

The team, who experimented on themselves and others, hope their findings could one day help improve tools for studying color ...