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This season, How the Earth Was Made goes back in history from 4.5 billion years ago to today peeling back layers of rock, filling up river canyons, parting the oceans, and leveling mountains and volcanoes to investigate the origins... Science http://topdocumentaryfilms.com/how-the-earth-was-made-season-2/ http://topdocumentaryfilms.com/how-the-earth-was-made-season-2/ 170517