Skip to main content

Up Next

How Atom Bombs Can Uncover Forged Art

How Atom Bombs Can Uncover Forged Art

Season 5 Episode 44
5:06
How Much Plastic is in the Ocean?

How Much Plastic is in the Ocean?

Season 5 Episode 10
4:43
Why Is Blue So Rare In Nature?

Why Is Blue So Rare In Nature?

Season 5 Episode 45
7:39
Where Did Humans Come From?

Where Did Humans Come From?

Season 5 Episode 13
6:18
Why Are We The Only Humans Left?

Why Are We The Only Humans Left?

Season 5 Episode 14
6:09
Why Does Hair Grow The Way It Does?

Why Does Hair Grow The Way It Does?

Season 5 Episode 15
4:18
Are We All Related?

Are We All Related?

Season 5 Episode 16
6:06
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
Back to Show
It's Okay to Be Smart

Illuminating the Universe: The History of Light

Season 5 Episode 9

Beyond what we can touch, taste, smell, and hear, we experience the universe through light. But how did we come to discover light, and how did we learn light’s true nature, as the fastest thing in the universe, an electromagnetic spectrum, a wave and particle capable of the most amazing things? Here is the history of light, according to physics.

Sign up now for inspiring and thought-provoking media delivered straight to your inbox.
Support Provided By
Season
7 Scientific Urban Legends Debunked!
11:24
I look at a few of the most famous incorrect factoids in science.
Why Don't Birds Lay Square Eggs?
7:21
What is ”egg-shaped” even?
How Blind People See With Sound
16:07
Blind YouTuber Molly Burke shows Joe Hanson a new way to see.
Why do Trees Talk to Each Other?
5:27
Walk into any forest, and beneath your feet is what helps make life on Earth possible.
Why We Are Losing the Night Sky
10:26
It never gets dark anymore. Not REALLY dark, anyway.
Apollo’s Most Important Discovery: NASA’s Moon Rock Vault
10:25
Fifty years ago, we sent the first astronauts to walk on the moon’s face.
Could You Be a Chimera?
9:43
Could You Be a Chimera?
Using Gene Editing To Repaint Butterfly Wings
11:12
The Art of Gene-Editing Butterflies (Painting with CRISPR!)
Is Your Eye Color Real?
5:37
How does eye color work?
1 MILLION Species Could Go Extinct… Here’s Why.
5:55
One million species may be at risk of extinction.
How to Drink Coffee In Space
10:30
How do astronauts actually drink coffee in space,
Why Getting Dizzy is Kinda Like Temporary Brain Damage
8:35
We’ve all gotten dizzy before… but have you ever gotten WEIRD DIZZY?
Active loading indicator