The Supreme Court in Washington, D.C. voted against Arizona's appeal, which would have allowed a state ban on drivers licenses for young undocumented immigrants. Carolyn Kaster/AP hide caption

itoggle caption Carolyn Kaster/AP

U.S. intelligence officials believe North Korea was centrally involved in the recent attack on Sony Pictures' computer network — possibly out of retribution for its film The Interview. Above, a security guard stands outside a theater during the film's premiere in Los Angeles last week. Kevork Djansezian/Reuters/Landov hide caption

itoggle caption Kevork Djansezian/Reuters/Landov

This design of this new anti-Ebola suit will make health workers more comfortable and could also save lives. Courtesy of Clinvue and Roy Heisler hide caption

itoggle caption Courtesy of Clinvue and Roy Heisler

A customer picks up a block of butter at a food store in Tokyo on Nov. 10th. Japanese shoppers are up in arms over a serious butter shortage that has forced Tokyo to resort to emergency imports, as some grocers limit sales to one block per customer. Yoshikazu Tsuno/AFP/Getty Images hide caption

itoggle caption Yoshikazu Tsuno/AFP/Getty Images

The Islamist group Hamas, shown here in a rally in the Gaza Strip on Dec. 12, is the strongest faction in the Gaza Strip. The Islamic State, or ISIS, is not believed to be in the territory, though fliers purporting to be from the group have circulated in Gaza. They are widely believed to be fake, but both Israel and Hamas have tried to use them to their advantage. Mahmud Hams/AFP/Getty Images hide caption

itoggle caption Mahmud Hams/AFP/Getty Images

Najin, a female northern white rhino, gets a pat from keeper Mohamed Doyo. Najin, who lives at the Ol Pejeta Conservancy in Kenya, is one of only five of its subspecies left in the world. Ben Curtis/AP hide caption

itoggle caption Ben Curtis/AP

Fidel Castro looks up at the Jefferson Memorial on April 16, 1959. The Cuban leader visited Washington several months after seizing power. But U.S.-Cuban relations quickly frayed, and the U.S. imposed an embargo of the island in 1960. AP hide caption

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Rob Knight, co-founder of the American Gut Project at the University of Colorado in Boulder, works in the lab where the samples are processed. The American Gut Project hide caption

itoggle caption The American Gut Project