A technician opens a vessel containing women's frozen egg cells in April 2011 in Amsterdam. AFP/Getty Images hide caption

itoggle caption AFP/Getty Images

Corn farmer Jerry McCulley sprays the weedkiller glyphosate across his cornfield in Auburn, Ill., in 2010. An increasing number of weeds have now evolved resistance to the chemical. Seth Perlman/AP hide caption

itoggle caption Seth Perlman/AP

A school official shows a pupil an infrared digital laser thermometer before taking his temperature in Lagos, Nigeria, in September. Starting this week, similar hand-held devices are checking foreheads for fever at some U.S. airports. Akintunde Akinleye/Reuters/Landov hide caption

itoggle caption Akintunde Akinleye/Reuters/Landov

"The sexts are currency," explains Hanna Rosin. Teenage girls told Rosin boys collect the photos like "baseball cards or Pokemon cards." iStockphoto hide caption

itoggle caption iStockphoto

Microsoft says it's patching a Windows security flaw cited in a report on alleged spying by Russian hackers. Ted S. Warren/AP hide caption

itoggle caption Ted S. Warren/AP

John Yoo, a former lawyer with the U.S. Department of Justice, argues that the NSA's phone records surveillance program is constitutional. Jeff Fusco /Intelligence Squared U.S. hide caption

itoggle caption Jeff Fusco /Intelligence Squared U.S.