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The Samsung Galaxy Mega (from left), Samsung Galaxy S4 and Apple iPhone 5 are shown. Apple is expected to announce larger models of its smartphone on Tuesday. Richard Drew/AP hide caption

itoggle caption Richard Drew/AP

The Armatix smart gun is implanted with an electronic chip that allows it to be fired only if the shooter is wearing a watch that communicates with it through a radio signal. It is not sold in the U.S. Michael Dalder/Reuters/Landov hide caption

itoggle caption Michael Dalder/Reuters/Landov

Rodin's Left Hand of Eustache de St. Pierre, during the scanning process (from left); computer image created from the scan; inner anatomy; and exterior scan and inner anatomy combined for an augmented reality view of the sculpture. Photo by Matthew Hasel, render by Sarah Hegmann, Division of Clinical Anatomy, Stanford School of Medicine hide caption

itoggle caption Photo by Matthew Hasel, render by Sarah Hegmann, Division of Clinical Anatomy, Stanford School of Medicine

After a tornado leveled Moore, Okla., last year, firefighter Shonn Neidel (left) developed an app that helps first responders locate storm shelters under the wreckage. Courtesy of Shonn Neidel hide caption

itoggle caption Courtesy of Shonn Neidel