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8 Episodes
S4 E1 - Pluto's Stranger Things
S4 E2 - Rise of the Planet Killer
S4 E3 - A President's Close Encounter
S4 E4 - The Earth Next Door
S4 E5 - Curse of the Full Moon
S4 E6 - Did Earth Have Two Moons?
S4 E7 - Mystery of the Invisible Planet
S4 E8 - Mars's Deepest Secret
Streaming, rent, or buy NASA's Unexplained Files – Season 4:
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Synopsis
Astronomers find evidence for incredible alien technology around a distant star, Apollo astronauts see something they can't explain as they approach the moon, and a planet-eating star gives scientists a glimpse of Earth's terrible demise. Explore these and many other mysteries on this season of NASA's Unexplained Files.
