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Killer Floods Preview
Scientists uncover geologic evidence of epic floods that tore through ancient landscapes.
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Eclipse Over America Trailer
The country’s first solar eclipse in 99 years will cast a light on the Sun’s secrets.
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Day the Dinosaurs Died Preview
Experts drill into the impact crater of an asteroid that created a worldwide cataclysm.
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Bird Brain Preview
Watch as birds solve puzzles and challenge our basic notions of intelligence.
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Beyond the Elements: Indestructible Preview
Discover the fascinating chemistry that makes our world and everything in it—including us.