An Argentine farmer stands by his field of trangenic soy, designed for resistance to drought and salinity. Juan Mabromata/AFP/Getty Images hide caption

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Weekend Edition Saturday host Scott Simon documented his mother's final days to his more than 1.2 million Twitter followers. Stephen Voss/NPR hide caption

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An artist's impression shows the area around a supermassive black hole at the heart of the galaxy NGC 3783 in the southern constellation of Centaurus. Could a wormhole connect one black hole to another elsewhere in the Universe, creating an entangled pair? M. Kornmesser/ESO hide caption

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Former Democratic Rep. Lindy Claiborne Boggs attends the Distinguished Service Award ceremony at the Capitol in May 2006 in Washington, D.C. Chip Somodevilla/Getty Images hide caption

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