A microscopic look at why the world is running out of sand
19:38
Is the World Really Running Out of Sand?
16:22
Sand Dunes Shouldn’t Exist (Here’s Why They Do)
10:30
Gold isn’t rare. So why is it valuable?
13:08
We’re Running Out of Sand (and It’s a Huge Problem)
27:15
The Most Misunderstood Concept in Physics
9:17
I thought this was fake
11:48
How Miners Find, Cut, And Transport The Most Expensive Amethysts In The World | So Expensive
19:33