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?
16:02
Solving Desert Water Shortages Using 20,000 Volts
24:57
The Man Who Accidentally Killed The Most People In History
28:13
The most important country you’ve never heard about, Mapped
29:30
This Is Why You Can’t Go To Antarctica
1:42:54
11 Rare And Expensive Objects Mined From Earth | So Expensive Marathon
25:27