U.S. Nuclear Weapons More Stable than Expected

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Intricacies of Ancient Lunar-Cycle Machine Revealed

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EPA Expected to Issue Million-Year-Long Regulation

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Los Alamos Lab Adjusts Security After Breach

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Sounding Off on a Tennessee Cave Tale

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Astronauts Will Fix Hubble Telescope

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Exploring Tennessee's Caves for New Species

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FBI: Secret Los Alamos Files Traced to Woman

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Drug Raid Turns Up Classified U.S. Documents

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Nobel Physics Prize Goes to Big-Bang Work

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New Angles Emerge in Anthrax Attacks of 2001

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Experimental Lotion Could Be Secret to a Safe Tan

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Researchers Announce Creation of Laser Chips

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Will a Layer of Silt in the Sky Save the Earth?

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