In an Energy Breakthrough, Scientists Just Pulled Electricity Out of Thin Air

Cool story from Popular Mechanics (Apple News+):

In a basic sense, evaporation takes away an immense amount of heat through vaporization. Just one gram of water translates into roughly 2,250 joules of heat absorption, enough to theoretically power a 60-watt lightbulb for 38 seconds. This new evapolectric device attempts to miniaturize this process in the hopes of powering future wearables and sensors. And that future seems possible as Suwardi and his team proved they could supply energy to a simple LCD display using only this moisture-based method.