Useful Shadows

Creating electricity that is clean and efficient has always been the goal of humans.  And humans, the inquisitive beings they are, have devised an array of unique ways to harvest and produce electricity. Now scientists in Singapore have developed a device made of gold and silicon that can produce electricity from light and shadows.  Known as the "shadow-effect energy generator", it can produce small voltages to power small devices.  Being in its early stages, more efficient generators will eventually be designed.  Check out the details here.