Riding Invisible Waves to the Edge of Space: The Unpowered Glider That Flew Higher Than a Spy Plane
The Perlan II, an unpowered glider, holds the astonishing world record for the highest subsonic flight. It soared over 76,000 feet by 'surfing' rare atmospheric waves, pushing the boundaries of aviation and conducting vital research at the edge of space without burning a single drop of fuel.