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It’s Okay to Be Smart

Why is the sky any color?

Video duration: 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 Smart94

Video thumbnail: It’s Okay to Be Smart The Surprising Places We Waste Energy

It’s Okay to Be Smart

The Surprising Places We Waste Energy

We use a LOT of energy, but we waste a lot too.

3:26

The Surprising Places We Waste Energy

3:26

Video thumbnail: It’s Okay to Be Smart Does The Moon Really Orbit The Earth?

It’s Okay to Be Smart

Does The Moon Really Orbit The Earth?

What holds the moon up? Moonbeams!

2:44

Does The Moon Really Orbit The Earth?

2:44

Video thumbnail: It’s Okay to Be Smart What's The Loudest Possible Sound?

It’s Okay to Be Smart

What's The Loudest Possible Sound?

It's definitely higher than "11"

3:49

What's The Loudest Possible Sound?

3:49

Video thumbnail: It’s Okay to Be Smart Could We Clone Ourselves?

It’s Okay to Be Smart

Could We Clone Ourselves?

Just be yourself! Or be your other self. Whichever.

5:31

Could We Clone Ourselves?

5:31

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