For more than a billion people across the planet, however, electricity is a limited, rare commodity. High schooler Ann Makosinski, 16, of Victoria, Canada learned of this reality and dedicated a science fair project to the situation. Her hand-heat-powered “Hollow Flashlight” was, in her mind, a practical solution to a pretty big problem. To the science community at large, it was a stroke of genius to recognize that power originates within every one of us—every day, all the time. Thermoelectricity took a step forward.