Ashton Stark stands next to his 1972 Volkswagen Beetle, which he converted into an electric car. Courtesy Noel Stark hide caption

itoggle caption Courtesy Noel Stark

Smart bandages, including this one from Corventis, can transmit cardiac data in real time from a patient's body to a doctor. Courtesy of Mark Dastrup hide caption

itoggle caption Courtesy of Mark Dastrup

This composite image of brain scans shows two traits of a highly impulsive individual. The cool colors in the midbrain are indicative of a decrease in dopamine receptor levels while the warm colors show elevated levels of dopamine in a different part of the brain called the striatum. Joshua W. Buckholtz and David H. Zald hide caption

itoggle caption Joshua W. Buckholtz and David H. Zald

A woman performs chest compressions on a mannequin while learning CPR on the steps of San Francisco City Hall. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images

A Pleurosigma, a type of phytoplankton in the ocean. Phytoplankton generate more than half of the Earth's oxygen. Harry Taylor/Nikon Small World hide caption

itoggle caption Harry Taylor/Nikon Small World

A group of teenagers take a morning jog at the Wellspring Academy in Reedley, Calif., in 2009. The school specializes in helping teens and college students lose weight. A new study shows teens who remain obese risk a lifetime of chronic health problems and poverty. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images