Kurweil AI
MIT researchers discovered last year that when water droplets spontaneously jump away from superhydrophobic (water-repelling) surfaces during condensation, the droplets can gain electric charge in the process.
Now the same team has demonstrated that this process can generate small amounts of electricity, which could lead to devices that can charge cellphones or other electronics using just the humidity in the air. As a side benefit, the system could also produce clean water.