Up Next
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.
Support Provided By
12:54
Can new technologies make death prediction even more accurate?
10:40
The cosmic distance ladder is the world’s longest ruler, built to measure the universe.
15:17
On April 8, North America is getting a total solar eclipse. Here’s what you need to know.
12:09
Learn about the space junk problem and the giant space claw named ClearSpace-1 that might
14:28
These tiny pieces of an ancient asteroid could hold the secret to the origin of life.
10:28
What do scientists think are the best ways of reaching out to aliens?
13:38
A cosmic soup hadn’t existed in 13.8 billion years. Now, scientists cook it up in a lab.
12:56
After a century of industrial pollution and superstorms, New York's waterways needs help!
37:33
Crashing a car is usually a terrible accident. But sometimes, it’s a way to save lives.
18:10
A huge part of our identities, emotions, and our lives get tied up...Why is that?