The strange craft was spotted by workers at Chicago's O'Hare International Airport flying through the skies above and has left experts baffled as to exactly what it could be
Silent, disk-shaped UFO seen by 12 United Airlines staff over Chicago airport may hold key to interstellar space travel -- Science & Technology -- Sott net sott.net - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from sott.net Daily Mail and Mail on Sunday newspapers.
An Alcubierre warp drive, craft would benefit from a classic flying saucer-shape, the physicists said. And the warp bubble created could help explain the lack of radar signal