What if we're all from Mars? AFP/Getty Images hide caption

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If Life Traveled From Mars To Earth On A Rock, Who Are We?

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Visitors explore Robert Irwin's Scrim Veil--Black Rectangle--Natural Light during its 2013 reprise at the Whitney Museum of American Art. ©Robert Irwin/Photography ©2013 Philipp Scholz Rittermann/Courtesy of the Whitney Museum hide caption

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Week In Politics: Debate Over A U.S. Strike In Syria

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Physicists searching for a "Theory Of Everything" are like kayakers paddling against the current, in search of the water's source. iStockphoto.com hide caption

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A gay-rights activist chants slogans during a demonstration in front of the Russian Consulate in New York on July 31. Gays in the United States and elsewhere are outraged by Russia's intensifying campaign against gay-rights activism. Mary Altaffer/AP hide caption

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How About A Gold Medal For Human Rights For Gay People?

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