What on Earth?
Season 12 Episode 9 - Secrets of Biosphere 2
6.4 ?
2015
Documentary
Satellite images capture a mysterious group of pyramid-shaped structures in the arid, desert landscape of Arizona; experts investigate a highly controversial research facility designed to prepare humanity for life on another world.
Episodes in Season 12
1
Bullseye in the Sky
42 min
2
Mystery of the Fallen Star
42 min
3
Indiana's War Factory
42 min
4
Turkey's Lost Terror Dome
42 min
5
Blood Feud of Gresham Castle
42 min
6
The Boneyard of Arizona
42 min
7
Nevada's Mystery Marking
42 min
8
Ghost Ship of Ireland
42 min
9
Secrets of Biosphere 2
42 min
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