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Was Megastorm Sandy a freak combination of weather systems? Or are hurricanes increasing...
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How and why did the ancient islander inhabitants of Easter Island build and move nearly...

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The Vikings were among the fiercest warriors of all time, known for creating the ultimate...
NOVA  ·  Episode 3915

Ultimate Mars Challenge


In its search for life beyond Earth, NASA employs a "sky crane" maneuver to land the Curiosity rover on Mars.

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