China has successfully tested high- altitude bat-sized spy drones which could help it dominate “near space” and use it for military intelligence purposes, a media report said.
Near space, which begins at about 20km above sea level, has until now been regarded a “death zone” for drones due to thin air and extremely low temperatures. At this altitude, thin air makes it hard to generate lift for a drone while extremely low temperature means electronic components, like batteries are prone to fail.