A protest of the Keystone XL pipeline last March along its proposed route near Bradshaw, Nebraska. NH/AP hide caption

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State Dept. Delivers Unwelcome News For Keystone Opponents

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"People like to share, if you give them the opportunity and the choice." — John Wilbanks James Duncan Davidson/TED hide caption

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Is Too Much Privacy Bad For Your Health?

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A tasseled wobbegong shark (top) lies on the seafloor with the head of a brown-banded bamboo shark in its mouth on the fringing reef of Great Keppel Island on Australia's Great Barrier Reef in August 2011. Reuters/Landov hide caption

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Scientists Come Close To Finding True Magnetic Monopole

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What's The Problem With Feeling On Top Of The World?

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Magellanic penguins strut their stuff on the rocky shoreline of Argentina's Punta Tombo, home to the largest colony of the birds in the world. Craig Lovell/Corbis hide caption

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Changing Climate In Argentina Is Killing Penguin Chicks

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Researchers Watch As Our Brains Turn Sounds Into Words

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Charles, Prince of Wales, smells before tasting some ice cream during a visit to Gloucestershire. Maybe he was sniffing for fat? Barry Batchelor/Getty Images hide caption

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Some men take testosterone hoping to boost energy and libido, or to build strength. But at what risk? iStockphoto hide caption

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