This genetic phenomenon is rare. The exact combination of genes needed to produce gray eyes occurs in only a tiny fraction of the world's population. Unlike more common eye colors like brown ...

Researchers discover a new color outside the range of human color vision, but you have to laser your retinas to see it ...

According to the World Atlas, about 90% of the global population has dark brown or black hair, and 70% to 80 % of people have brown eyes. It’s not exactly the rarest hair color and eye color ...