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Apr 18

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The drone debate usually centers around U.S. use of the unmanned aircraft in other countries, such as Afghanistan, Pakistan and Yemen, to target terrorists. But how are drones used in the United States and how far are we from miniature…

Elvis Presley receives the Salk polio vaccine in 1956. Awareness about the vaccine led to the end of polio in the U.S. Most babies today still receive the injection. Photo courtesy of March of Dimes. April 12, 1955, was…

The parachute for the Mars Science Laboratory mission to Mars opened before launch. Photo by NASA/JPL-Caltech. A newly released series of images snapped by NASA's Mars Reconnaissance Orbiter reveals that the Curiosity rover's parachute has been flapping…