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?
10:44
Two theories for an unsolved Soviet mystery
14:11
Inside Africa's Food Forest Mega-Project
34:18
Por qué Arabia Saudita está construyendo una ciudad de un billón de dólares en el desierto
25:27
How Japanese Masters Turn Sand Into Swords
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The Man Who Accidentally Killed The Most People In History
17:26