How humans evolved blue eyes

Human eyes range in color from very dark brown to the palest of blue and is affected by the amounts of a pigment called melanin in the iris. The perception of eye color can also be affected by the prevailing light conditions and the local environment. At Copenhagen University researchers have done a lot of thinking and a lot of research on where people got their blue eyes from and come up with an answer and published their findings in Journal of Human Genetics.
 

A blue human eye - by 8thstar - CC BY-SA 3.0

They have discovered that blues eyes are the result of a single mutation that happened to one person who probably lived some where in what is now Romania around the Black Sea region, around 6,000 to 10,000 years ago. This means that all blue-eyed people in the world today are genetically related to that person and each other.

According to their research, a gene in the chromosome known as OCA2 under went a mutation and can be traced back to one of our ancestors who lived in that region at that time. The researchers say that before this event every one in the world had brown eyes.  Read more