Season 2 · Episode 1
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Earth: The Secret History
Tue, Mar 20, 2018
·
42 min
Astronaut Mike Massimino uses the latest science to reveal the strange secrets of planet earth, and explores whether alien earths exist elsewhere in the universe.
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Airs
Tue, Mar 20, 2018
42 min
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The Planets
23 episodes
Episode
S2 · E1
in The Planets
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S2 · E2
Alien Planets: Cosmic Nightmares
Tue, Mar 27, 2018