BBC News: A prototype solar-powered plane has made its first full test flight - coming closer to the goal of using solar energy to fly around the world.The Solar Impulse, with a wingspan similar to that of a super-jumbo jet but weighing the same as a saloon car, took off from a Swiss airfield.The plane’s wings are covered by solar cells which power four electric motors.Its designers hope a slightly larger production model will circumnavigate the globe in two years’ time.
His 1988 sketch of how to use Antarctic ice to detect neutrinos led to the IceCube observatory, which made the first detections of high-energy neutrinos in 2013.
