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The UnXplained: Ancient Alien Civilizations Hidden On Mars (Season 3)
Researchers believe they’ve discovered artificial structures on Mars, home to extraterrestrial civilizations, in this clip from Season 3, "Mysteries of Mars" Watch all new episodes of The UnXplained, Fridays at 8/7c, and stay up to date on all of your favorite The HISTORY Channel shows at http://history.com/schedule. #TheUnXplained Subscribe ...
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