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Why Do Fireflies Have Blinky Bottoms?

Why Do Fireflies Have Blinky Bottoms?

Season 5 Episode 23
4:22
How Do Glaciers Move?

How Do Glaciers Move?

Season 5 Episode 26
6:30
When Is It Winter On Other Planets?

When Is It Winter On Other Planets?

Season 5 Episode 29
5:00
How Poop Shapes the World

How Poop Shapes the World

Season 5 Episode 30
3:34
Do You Really Have Two Brains?

Do You Really Have Two Brains?

Season 5 Episode 33
4:20
Why I ❤ PBS

Why I ❤ PBS

Season 5 Episode 11
2:32
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It's Okay to Be Smart

De-Extinction: A Mammoth Undertaking

Season 5 Episode 18

De-extinction, or using the power of modern biotechnology to bring back extinct species like mammoths and dinosaurs, would be cool. But is it really as easy as the movies make it look? Or do the cruel hands of time make it impossible? This week we look at the technical and ethical hurdles behind the science of de-extinction and reverse engineering species that are no longer around.

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