A man has taken to social media to share the 'hardest logic puzzle in the world' - and it has taken some people 45 minutes to ...

The puzzle further complicates things by stating: "So any given blue-eyed person can see 100 people with brown eyes and 99 people with blue eyes (and one with green), but that does not tell him ...

All blue-eyed people have one ancestor in common ... The OCA2 gene determines how much brown pigment is in our eyes. But what they were looking for wasn't there at all. The mutation was found ...

According to the American Academy of Ophthalmology, about 27% of Americans have blue eyes, while 45% have brown eyes. Across ...