Strange and Mysterious: UFOs

What are UFOs, and has our planet ever really been visited by aliens? Thousands of people every year believe that they have seen signs of life from other planets, but is there any good evidence for this?With a mix of intriguing photographs and unsettling illustrations, this book examines real cases of UFO sightings and alien contact claims, presenting possible explanations - both extra-terrestrial and more everyday - for close encounters of every kind.The search for aliens is not limited to planet Earth. This book also covers efforts to find alien life on other planets, and to capture signals and messages that may come from creatures living far out in space.Read terrifying and often bizarre tales of alleged alien abductions, find out about famous fakes and enter the murky world of government conspiracies and science fiction. Is there really any evidence that aliens and their technology have come to Earth? Can sightings all be dismissed as the result of secret human technology... or just very vivid imaginations?Make up your own mind about what really happened.