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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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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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The Two-Way

Asteroid Belt May Be Just One Big Melting Pot Of Space Rocks

New research shows that a planetary reshuffle might have shaped the ring of rubble between Mars and Jupiter.

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Gas flaring near Highway 85 southwest of Williston. Analysts estimate that almost 30 percent of the gas being produced in the state is burned off. Jeff Brady/NPR hide caption

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