Science of UFO's: An Astronomer Examines the Technology of Alien Spacecraft, how They Travel, and the Aliens Who Pilot Them
William R. Alschuler

The Science of UFOs objectively examines reports and claims that have been made about the behavior of purported alien spacecraft and their occupants, evidence of ancient visitations on Earth and other planets, the meaning of species and hybrids in the context of modern genetics, and non-spatial methods of interstellar travel. Current knowledge and theories in physics, biophysics, and space sciences are used in a clear and entertaining way to test and discuss the idea that aliens have arrived on Earth—or at least are maneuvering in our atmosphere—in a manner that defies our current understanding of the universe.