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Oklahoma's Deadliest Tornadoes Preview
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Hear stories from survivors of Moore’s tornado and meet scientists who stalk these storms.
Manhunt—Boston Bombers Preview
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Follow the manhunt, step-by-step, for the suspects in the Boston Marathon bombings.
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Scientists are learning how we can edit memories—and delete our worst fears.
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What’s behind the death of a tiny creature with an outsized role in the Antarctic?
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How did massive volcanic eruptions, inland seas, and land bridges pave the way for life?
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In WW1 Allied troops tunneled under enemy lines to create the biggest explosion ever seen.
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Retrace the thought experiments that inspired his theory on the nature of reality.
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Watch as the New Horizons spacecraft captures our first clear view of Pluto’s icy surface.
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A team attempts to build the flood boat using inscriptions from an ancient clay tablet.
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Is math invented by humans, or is it the language of the universe?
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A unique coral reef in Papua New Guinea shows what the future may hold as oceans acidify.
Colosseum: Roman Death Trap Preview
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1500 years ago, how did the Romans engineer bloody spectacles and reenact sea battles?
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