Scientists have invented a device that can continuously generate electricity from thin air, offering a glimpse of a possible sustainable energy source that can be made of almost any material and runs on the ambient humidity that surrounds all of us, reports a new study. The novel “air generator,” or Air-gen, is made from materials with holes that are under 100 nanometers in length, which is a scale thousand times smaller than a human hair. This design can pull electricity from water droplets in the air for much longer periods than previous concepts, the researchers report, suggesting that it could eventually provide ... (full story)