GMA: Can you imagine homes and buildings remaining cool with air conditioning, or cars that dont heat up like ovens in open parking lots? Stanford scholars have just come up with a new form of cooling panel that reflects sunlight back into space, thus keeping man-made structures cool even in the daytime. The device, described in a paper published March 5 in Nano Letters, works two ways. As a broadband mirror, it reflects as much sunlight hitting a surface as possible. As a thermal emitter, it radiates...