Overview:A metallic core at the center of the Earth turns the planet into a magnet, generating a field that protects life on the surface from cosmic radiation.
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First Air Date: May 23, 2013Last Air date: Dec 08, 2014Season: 2 SeasonEpisode: 17 EpisodeRuntime: 21:14 minutesQuality: HDIMDb: 5.7 / 10 by 3 usersPopularity: 1.615Language: en
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