
Season 44 Episodes
- Pluto's Strange SecretsS4 E10NASA's mission to Pluto gathered the first close-up pictures of this strange and distant world, and now, new discoveries and the latest science reveal the secrets of its alien features, which could point to extraterrestrial life.
- Dark Origins of the MoonS4 E11New discoveries reveal that everything known about the moon could be wrong; investigators race to understand the mysteries of its dark and violent past.
- Mystery of the Alien MegastructureS4 E12A mysterious star hundreds of light years away might hold the hard evidence of extraterrestrial life, as experts speculate that its bizarre behavior points to proof of a massive alien-made megastructure.
- Journey to Saturn's RingsS4 E13New discoveries change everything known about Saturn's rings, revealing that they're newer and more mysterious than ever imagined, and that some day soon, they might disappear forever.
Mystery of the Alien MegastructureSeason 4 Episode 12
Cast
David O'Brien, Michelle Thaller, Hakeem Oluseyi, Phil Plait, Laura Danly, Alex FilippenkoRating
TV-PG
Genres
Documentary, ScienceFrequently Asked Questions
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