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A UFO crashes in Pennsylvania. Was it a secret Soviet satellite or something far more dangerous? On Mercury, NASA finds the impossible: frozen water. A strange object causes a skyscraper-sized shadow on the surface of Mars's largest moon. What is it?
First Air Date : Mar 27, 2012
Last Air date : May 23, 2019
Episode : 47 Episode
Season : 6 Season
Runtime: 26:14 minutes
Studio: Science
Cast:
Crew:
