Medically reviewed by Johnstone M. Kim, MD Key Takeaways Gray and green eye colors are the rarest in the world.Eye color is ...

Do you have blue eyes? We talked to experts to discover curious facts about baby blues. Like, are all blue-eyed people ...

When it comes to dogs, you've probably noticed that most of them have brown eyes, which is why meeting one sporting a different shade really makes them stand out. While you've probably seen a few pups ...

The mesmerizing colors of human eyes—from deep browns to vibrant blues, subtle greens, and rare ambers—result from intricate genetic factors that influence melanin production in the iris. This same ...

When it comes to dog's coats, merle one of the most jaw-dropping color patterns around. Also known as "dapple," the end result looks like a breathtaking splatter painting—irregular splotches of dark ...