Up Next
Back to Show
It's Okay to Be Smart
Sunlight Is Way Older Than You Think. Here’s Why…
Season 8
Episode 4
If the sun instantly switched off like a light bulb–which can’t happen, by the way–then we wouldn’t know for almost 8 and a half minutes. Light travels at the fastest speed there is, but it still takes almost 500 seconds to get to Earth. But the most amazing thing about the sunlight we see is it’s actually SUPER old. How is that possible? Because of the physics and mathematics of random walks.
Support Provided By
5:48
Got a bad habit you can’t break? That’s because it’s literally wired into your brain.
6:05
The answer led me to new knowledge about human development.
8:03
From anatomy to genes, here are some stories of how you got to be the way you are.
4:20
Why do we cry? It’s weird.
5:37
Spices have special powers that make them a truly magical superfood!
5:07
Whatever you call it, flatulence, passing gas...it's natural and here's how it works.
6:24
We break down the concept of “biomass” to judge Earth’s living things from top to bottom.
5:11
Weird things happen at extreme hot and absolute cold.
7:48
Here’s the science of convergent evolution!
4:13
The origin of water traces beyond the solar system to the earliest days of the universe!
7:16
Axolotls are special salamanders because they can regenerate entire limbs!
4:59
We explore how and why itching help!