Gray and green eye colors are the rarest in the world. Eye color is determined by the amount of melanin in the iris, with more melanin making eyes darker. A genetic mutation 10,000 years ago caused ...

Cat-like eyes show up in searches everywhere. If the internet is this obsessed with eye color, how rare are green eyes in humans? They're uncommon enough that seeing them still feels like spotting a ...

Your eyes can tell you more about your health than you may realize. For instance, your risk of losing your hearing may be higher with a certain eye color.