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Killer Hurricanes
Experts reconstruct the Great Hurricane of 1780 to help predict the risk of future storms.
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Killer Volcanoes
Scientists hunt for a mega-eruption that plunged medieval Earth into a deep freeze.
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Can We Cool the Planet?
Scientists look to geoengineering and other methods to cool the planet.
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Ancient Earth: Inferno
How did life bounce back after a cataclysmic extinction wiped out some 90% of all species?
