MIT engineers design an ultrasonic system to “shake” water out of an atmospheric water harvester. The design (two prototypes shown in photo) can recover captured water in minutes rather than hours. Credit: Ikra Iftekhar Feeling thirsty? It may be possible to draw clean water directly from the air around us. Even extremely dry regions contain small amounts of humidity, and certain materials can soak up that moisture and release it as usable drinking water. Over the past several years,