Skip to main content
Donate

Up Next

The Randomness Crisis Threatening the Internet

The Randomness Crisis Threatening the Internet

Season 13 Episode 9
21:13
Why Seedless Fruit Is a Disaster Waiting To Happen

Why Seedless Fruit Is a Disaster Waiting To Happen

Season 13 Episode 10
14:51
Be Smart about Autism

Be Smart about Autism

Season 13 Episode 11
36:47
Mars Used to Be Blue... Then Something Happened

Mars Used to Be Blue... Then Something Happened

Season 13 Episode 12
11:08
(Almost) Everything You Learned About Genetics Is Wrong

(Almost) Everything You Learned About Genetics Is Wrong

Season 13 Episode 13
12:37
Inside the Vault Where They Keep the Dinosaur Apocalypse

Inside the Vault Where They Keep the Dinosaur Apocalypse

Season 13 Episode 14
22:36
The Scientific Lie That Damaged Generations of Men

The Scientific Lie That Damaged Generations of Men

Season 13 Episode 15
20:05
Everything I Thought I Knew About Flavor Was Wrong

Everything I Thought I Knew About Flavor Was Wrong

Season 13 Episode 16
19:50
The Intelligence Test Where Ants Beat Humans

The Intelligence Test Where Ants Beat Humans

Season 13 Episode 17
14:52
The Weird Science That Lets Insects Fly in the RainThe Weird Science That Lets Insects Fly in the Rain

The Weird Science That Lets Insects Fly in the RainThe Weird Science That Lets Insects Fly in the Rain

11:06
Episode 5: The Calling

The Calling

Season 4 Episode 5
53:05
When Whales Could Walk

When Whales Could Walk

Season 51 Episode 1
53:31
Back to Show
It's Okay to Be Smart

Blood Types Are Weirder Than You Think

Season 13 Episode 8

Across life on Earth, blood comes in blue, green, purple, even clear. But why? And what makes your blood different from mine? This is the strange world of blood—what it does, why it varies, and why we can’t live without it.
Stream on your TV
Support Provided By
Why Don't Birds Lay Square Eggs?
7:21
Season 7 Episode 19
Why Don't Birds Lay Square Eggs?
What is ”egg-shaped” even?
How Blind People See With Sound
16:07
Season 7 Episode 18
How Blind People See With Sound
Blind YouTuber Molly Burke shows Joe Hanson a new way to see.
Why do Trees Talk to Each Other?
5:27
Season 7 Episode 17
Why do Trees Talk to Each Other?
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
Season 7 Episode 16
Why We Are Losing the Night Sky
It never gets dark anymore. Not REALLY dark, anyway.
Apollo’s Most Important Discovery: NASA’s Moon Rock Vault
10:25
Season 7 Episode 15
Apollo’s Most Important Discovery: NASA’s Moon Rock Vault
Fifty years ago, we sent the first astronauts to walk on the moon’s face.
Could You Be a Chimera?
9:43
Season 7 Episode 14
Could You Be a Chimera?
Could You Be a Chimera?
Using Gene Editing To Repaint Butterfly Wings
11:12
Season 7 Episode 13
Using Gene Editing To Repaint Butterfly Wings
The Art of Gene-Editing Butterflies (Painting with CRISPR!)
1 MILLION Species Could Go Extinct… Here’s Why.
5:55
Season 7 Episode 11
1 MILLION Species Could Go Extinct… Here’s Why.
One million species may be at risk of extinction.
Is Your Eye Color Real?
5:37
Season 7 Episode 10
Is Your Eye Color Real?
How does eye color work?
How to Drink Coffee In Space
10:30
Season 7 Episode 9
How to Drink Coffee In Space
How do astronauts actually drink coffee in space,
Why Getting Dizzy is Kinda Like Temporary Brain Damage
8:35
Season 7 Episode 8
Why Getting Dizzy is Kinda Like Temporary Brain Damage
We’ve all gotten dizzy before… but have you ever gotten WEIRD DIZZY?
Unraveling the Great Butterfly Migration Mystery
9:12
Season 7 Episode 7
Unraveling the Great Butterfly Migration Mystery
The monarch butterfly migration is one of nature’s greatest events.
Show more
Active loading indicator