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 ...

Before the appearance of the mutation, the authors state, all humans shared brown eyes, which is the natural color of melanin ...

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 ...

I read countless young adult novels which described the captivating blue eyes or striking hazel hues of the female protagonists. ‘Boring’ brown eyes were hardly a fitting feature for the main ...