Relates the stories of a number of famous UFO sightings, including the purported crash of an alien spaceship in Roswell, New Mexico, in 1947.

Since prehistoric times, people have wondered how the universe works. Early scientists studied how forces affect objects and watched how heavenly bodies move. In 1687 Isaac Newton published a set of laws that described the motion of all objects, both on Earth and in the heavens. By 1900 many physicists believed only a few questions remained to be answered. But the early 1900s brought revolutionary developments in physics. One was Albert Einstein's...

Investigates several well-known accounts of alien abduction as well as theories aimed at explaining why such reports cannot be true.

Discusses the scientific developments and theoretical concerns that have led to current achievements in space exploration and will be necessary for future space travel.

Explores such unexplained human phenomena as hypnosis, spontaneous human combustion, and extrasensory perception.