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It's Okay to Be Smart
The Mystery Behind Earth’s Most Epic Migration
Season 11
Episode 6
Nothing can travel faster than light — in a vacuum. But when light slows down, sometimes matter can blaze past that speed limit, creating a stunning glow called Cherenkov radiation. We can see this glow in a nuclear reactor as high-energy particles speed by. It offers us a window into a realm of the universe that is usually invisible to us.
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10:44
Can trees really save us from climate change?
9:43
Could You Be a Chimera?
11:30
I went to NASA in Houston to talk to astronaut Don Pettit.
7:20
Why is ice slippery? It's a more complicated answer than it seems!
11:11
Recycling is broken. Here's how we can fix it.
14:55
People say insects are the food of the future.
11:53
Here’s a rundown of a few of the human body’s biggest evolutionary fails!
13:11
Meet your cousin: Homo naledi.
8:51
Why are trees and other plants green? The answer is full of surprises.
8:46
How do we see color in the first place?
11:20
Earth’s climate is changing in a big way.
9:36
Money. We all use it. But is it real?