Season 4 · Episode 9
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Mystery of the Northern Lights
Tue, Jul 17, 2018
·
51 min
The aurora borealis is one of Earth's most incredible sights, and new discoveries finally explain why these mysterious lights appear and what they reveal about the Sun's sinister and deadly powers.
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Tue, Jul 17, 2018
51 min
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Space's Deepest Secrets
68 episodes
Episode
S4 · E9
in Space's Deepest Secrets
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S4 · E10
Pluto's Strange Secrets
Sun, Oct 14, 2018