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Ice Age Death Trap Preview
Scientists race to uncover a site in the Rockies packed with fossil mammoths.
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Asteroid: Doomsday or Payday? Preview
Will future asteroids trigger massive extinctions—or be mined for precious minerals?
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Cold Case JFK Preview
Can modern forensic science uncover fresh clues about the assassination of JFK?
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Great Cathedral Mystery Preview
Master craftsmen explore how Florence’s monumental dome was built nearly 600 years ago.
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Hunting the Edge of Space: Mystery of the Milky Way Preview
Airs Wednesday, November 28, 2012 at 9:00 p.m. ET/PT. Check your local listings.