Up Next
Back to Show
It's Okay to Be Smart
Glass is Solid… So Why Is It Clear?
Season 8
Episode 25
Glass is made of sand, which is a kind of rock. But glass is transparent, and rocks aren’t transparent. What’s up with that? Why is glass clear? And why can I sit on a chair? And why can we touch anything? Today we zoom down to the weird world of electron clouds and quantum touching to find the answers.
Support Provided By
12:19
Do the supposed advantages for springing forward and falling back hold up?
8:23
The sunlight we see is tens of thousands of years old. How is that possible?
8:19
If humans are so smart, why are our babies so… un-smart?
6:28
How will we do a Green Revolution 2.0?
10:44
Can trees really save us from climate change?
9:43
Could You Be a Chimera?
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!
11:11
Recycling is broken. Here's how we can fix it.
14:55
People say insects are the food of the future.
11:53
Here’s a rundown of a few of the human body’s biggest evolutionary fails!
13:11
Meet your cousin: Homo naledi.