Up Next
Back to Show
It's Okay to Be Smart
Mars Used to Be Blue... Then Something Happened
Season 13
Episode 12
Why is the Martian sky red by day… but blue at sunset? And how did it used to look more like Earth? The strange story of Mars’ skies can reveal a lot about the Red Planet's past, and the surprising ways it is more like Earth than you may know.
Support Provided By
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!
11:53
Here’s a rundown of a few of the human body’s biggest evolutionary fails!
8:51
Why are trees and other plants green? The answer is full of surprises.
11:24
I look at a few of the most famous incorrect factoids in science.