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 more to it than the simple traits we learned about in ...

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The fascinating variety of cat eye colors results from some fascinating genetic interactions, development, and adaptation due to evolution. To fully understand how cats develop their distinctive eye ...

Many of the animals that eat red-eyed tree frogs are nocturnal hunters that use keen eyesight to find prey. The shocking colors of this frog may over-stimulate a predator's eyes, creating a ...

Daniel Merino, The Conversation (THE CONVERSATION) Reindeer noses may not glow red, but these creatures of cold climes have evolved the ability to change the color of their eyes to help them ...