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Why Is The Sky Blue…Or Red…Or Any Color At All?

New episode of It’s Okay To Be Smart is up! I tackle one of the oldest questions in the book:

Why is the sky blue (or any other color)? It’s a question that you’d think kids have been asking for thousands of years, but it might not be that old at all. The ancient Greek poet Homer never used a word for blue in The Odyssey or The Iliad, because blue is one of the last colors that cultures pick out a word for.

In this episode, I’ll tell you not only why the sky is blue, but why it’s red at sunset. It turns out, those colors are all part of the same sunbeam. And when you’re looking at a blue sky, you could be sharing a special moment with someone thousands of miles away. Next time a kid (or the kid inside you) wants to know why the sky is blue, you’ll have science to back you up!

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    • #science
    • #iotbs
    • #show
    • #pbs
    • #physics
    • #rayleigh scattering
    • #education
    • #video
    • #sky
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I'm Joe Hanson, Ph.D. biologist and host/writer of PBS Digital Studios' It's Okay To Be Smart. Check out my "Episode Extras" here. There's a lot of amazing science out there. Let's go discover it together.

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