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 ...

The MC1R (or melanocortin 1 receptor) gene helps decide your hair, skin ... blue eyes are related? Here’s the answer. What is the rarest hair color and eye color combination? That’d be red ...