Blue-eyed people may be more competitive Looking for someone to challenge you in your latest athletic or academic endeavor?

You can see the iris in action when ... population just because some people like how they look and chose to have children with blue-eyed people. Why do some eyes change colors in different lighting?

New research shows that all blue-eyed people share a common ancestor ... But what they were looking for wasn't there at all. The mutation was found on an entirely different gene called HERC2.