Babies often do not have much pigment in their irises when they are born. This is ... to have children with blue-eyed people. Why do some eyes change colors in different lighting?

The mutation was found on an entirely different gene called HERC2 ... is a transcript of the video. All blue-eyed people have one ancestor in common, born around 6,000 to 10,000 years ago.

Do you have blue eyes? We talked to experts to discover curious facts about baby blues, including whether your biological family is bigger than you ever imagined.

Since melanocytes respond to light and babies are in the comfort and darkness of the womb, they have little melanin, and therefore mostly blue eyes when they're born.