Tiny solar-powered drones could stay in the air forever

An aerial robot weighing 4 grams is powered by tiny solar panels that produce extremely high voltages – an approach that could enable drones to fly indefinitely

​An aerial robot weighing 4 grams is powered by tiny solar panels that produce extremely high voltages – an approach that could enable drones to fly indefinitely An aerial robot weighing 4 grams is powered by tiny solar panels that produce extremely high voltages – an approach that could enable drones to fly indefinitely