Drone with wingspan of Boeing 747 flies 74 hours non-stop using only solar power
Planes need fuel. Lots of it. This solar-powered drone, called Skydweller, doesn’t. The US-built drone just stayed in the sky for more than three days straight – no gas, no pit stops. Just sunlight and batteries doing their thing. Its wings stretch wider than a Boeing 747, which is insane when you remember it’s not […]



