Are crop circles made by man or Martians? Are they natural phenomena or a message from the divine? They appear around the globe and have done so for hundreds of years. They often appear instantly before the eyes of witnesses. Thousands of images prove their existence. Science has been used in an attempt to unlock their mystery, and yet they remain a much debated subject.Andy Thomas is a leading expert on the subject, and he questions everything. With dozens of books on the subject and having traveled... Mehr