Science & Technology

Why Is the Color Blue So Rare in Nature?

You may have heard that there's no such thing as blue in nature. That's not really true — there are blue rocks, blue waters, and good ol' blue sky. But still, blue is strikingly rare in the natural world. The video series It's Okay to Be Smart explains why this is, starting with butterflies.

Written by Curiosity Staff October 4, 2018

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