Who made these circles in the Sahara?
25:06
Why does this forest look like a fingerprint?
24:33
What's inside this crater in Madagascar?
17:26
The world's biggest wave, explained
17:30
This is why we can't have nice things
29:23
Exploring the Secret US Government Town with No Internet & Phone Service (100% Disconnected?)
10:44
Two theories for an unsolved Soviet mystery
9:28
The Crazy Engineering of Venice
19:55