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It’s Okay to Be Smart

Why is the sky any color?

2:43

Why is the sky blue? 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.

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Life by the Numbers

Life by the Numbers

How successful are we compared to other species? It turns out that biomass, or what things weigh, can be mo...

The Auroras

The Auroras

Space might seem like an empty place, but the area surrounding Earth is constantly being bombarded by waves...

Episodes of It’s Okay to Be Smart44

It’s Okay to Be Smart

Zombie Parasites!

Are zombies real? Could they actually exist?

6:01

It’s Okay to Be Smart

Bats: Guardians of the Night

Why are some of nature's coolest animals also the most feared?

4:54

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