Describes various sightings of and close encounters with UFO's and discusses scientific arguments for and against the probability that life exists on other planets and that we are being visited by that life.
Describes numerous archaeological projects in all parts of the United States which provide opportunities for young people to work as volunteers. Includes first-person accounts of their experiences by archaeologists and volunteers, as well as general information on archaeological methods and the profession of archaeology.
Describes a variety of underwater expeditions undertaken by archaeologists, scientists, and fortune hunters seeking to uncover the secrets of past civilizations, sunken treasure ships, and the existence of mysterious water creatures.