For women who carry certain genes, getting a double mastectomy before anything shows up on a mammogram may reduce breast and ovarian cancer risk. Damian Dovarganes/AP hide caption

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Eggs themselves are remarkably resistant to germs like salmonella. The shell and proteins in the egg white normally do a good job of fending off pathogens. But eggs laid by a bird infected with salmonella will likely be infected, too. Courtesy of John Ingraham hide caption

itoggle caption Courtesy of John Ingraham

Google has created a new priority inbox system for its Gmail service. The new system sorts through your messages and puts the important ones in a separate box called Important. hide caption

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A Russian man shovels grain at a farm in Vasyurinskoe earlier this month. The U.S. government cut its forecasts for global wheat production as Russia suffers its worst drought in decades. Mikhail Mordasov/AFP/Getty Images hide caption

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This image released by the Mexican federal police shows drug kingpin Edgar Valdez Villarreal, aka "the Barbie," a member of one of the country's top drug cartels, during his arrest Monday. HO/AFP/Getty Images/HO/AFP/Getty Images hide caption

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