The latter half of the twentieth century has often been called the Space Age, but it might arguably be dubbed the Alien Age as well. Ever since an American businessman reported seeing what he called 'saucers' flying over Washington State in 1947, hundreds of thousands of people around the world have announced their own sightings of unidentified flying objects, or UFOs. Of these witnesses, more than three hundred report that they were taken aboard UFOs - many to be subjected to physical examinations by extraterrestrial beings. Still more extraordinary, about thirty of those who claim to have been abducted say that after their physicals they were transported beyond Earth's familiar surroundings to visit other worlds.