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Shared DNA reveals a deep connection with our long-vanished human cousins.
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Was Megastorm Sandy a freak combination of weather systems? Or are hurricanes increasing...

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In its search for life beyond Earth, NASA employs a "sky crane" maneuver to land the...
NOVA  ·  Episode 4001

Doomsday Volcanoes


Could the explosion of Iceland's ticking time bombs cause cold and famine worldwide?

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