Lilium plans five-seater air taxi after successful unmanned flight
Winds and shock waves top list of most deadly effects of asteroid impacts
Robotic cheetah moves almost as efficiently as the real thing
Bad teeth may have given man-eating lions of Tsavo taste for human flesh
NASA prints up complex metallic "space fabric"
S-97 Raider co-axial helicopter showcased in new video
Secret pouch from Apollo 15 up for auction
New steam locomotive hits 100 mph on British tracks for first time in 50 years