Almost daily all over the world, UFO sightings, close encounters, and even alien abductions are reported. Far from being a recent phenomenon, research shows witnesses have glimpsed inexplicable objects in Earth's skies for millennia. Yet many people still believe that these accounts are hoaxes, hallucinations, or human error. This objective, historical single-volume catalog of UFO sightings lets readers decide the truth for themselves. This enlightening dossier presents hundreds of UFO reports in chronological order from ancient Egypt to the present day, including all the landmark cases, such as the 1961 Betty and Barney abduction claim and the Trindade Island photographs. Written by a UFO expert, it will appeal to anyone fascinated by the unexplained.