Red is the rarest hair color, but to understand why that’s the case, you need a basic grasp of the science. There’s a lot ...

Like most human traits, blue eyes are determined by genes, and no two people have exactly the same hue. It works a lot like ...

Since childhood, I’ve harboured resentment against my eye colour. So dark brown that they almost blend into my pitch-black pupils. It’s boring to be one of between 55% and 79% of people with ...

“It may seem like green is rare,” says Dr. Kaplan, “but there are many people who have green-brown eyes.” Just as the MC1R gene determines your hair color, a single gene, OCA2, is 75% ...