The more melanin, the darker the person's eyes—and the smarter the person. "Brown-eyed people have more of that chemical in their eyes, so brown-eyed people are better than those with blue eyes ...

Interestingly, the inspiration to conduct these studies came from the researcher's own eyes, which are brown. Let's start with people with dark brown or black eyes. They are the most common ...

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 ...