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National Geographic unveiled its Pictures of the Year. Here are 7 of the most striking wildlife photos.

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A Cold War nuclear bunker is buried deep inside a Colorado mountain. See inside the Cheyenne Mountain Complex.

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A 14-year-old won $25,000 for origami. He discovered a pattern that can hold 10,000 times its own weight, he says.

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A century ago, the government hired unemployed young men to build America's forests, trails, and parks. Photos show FDR's 'tree army.'

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80 years ago, the US dropped an atomic bomb on Hiroshima. Haunting photos show what happened that day in 1945.

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NASA veterans say political pressure and slashed funding are destroying mankind's ability to go on future missions

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Elon Musk threatened, then walked back a decision to 'decommission' SpaceX's Dragon spacecraft after Trump hit out at his businesses

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