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.

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

Medically reviewed by Christine L. Larsen, MD Photophobia is an abnormal sensitivity to light. It is associated with dry eye ...

Thus, it's possible that blue-eyed people ended up having more of a competitive edge in this geographical area as blue eyes were rarer. As they explain in the paper, “The rare-colour advantage ...

2. Blue eyes: People with blue eyes are peace lovers and we already know that love brings that with it, but it also brings a little turbulence because not everything is pink. Being within a ...