Here’s a riddle for you: A plane flew for five days and nights, staying airborne for 118 hours. But it didn’t use a single drop of fuel. How? Bertrand Piccard explains.
Bertrand Piccard plans to fly around the world in a plane that doesn’t use any fuel. Huh? Yep. This machine is equipped with 17,000 solar panels. He explains the logistics and mechanics — and shares some hopes and fears for the upcoming voyage.