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Australia: Awakening Preview
Australia’s landscape holds clues to Earth's early history and the beginning of life.
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Ancient Computer Preview
Learn about the world’s first computer, which was found in a Greek shipwreck.
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Beyond the Elements: Life Preview
Discover the fascinating chemistry that makes our world and everything in it—including us.
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Secrets of the Viking Sword Preview
Airs Wednesday, September 25, 2013 at 9:00 p.m. ET/PT. Check your local listings.
NOVA
Killer Volcanoes Preview
Scientists hunt for a mega-eruption that plunged medieval Earth into a deep freeze.