J. Allen Hynek

"Two eminent scientists debate UFO incidents and persuasive cases, and explore what we still need to know about the phenomenon"-- "Two eminent scientists debate UFO incidents, persuasive cases, and exploration of what we still need to know about the phenomena. From the outset, Hynek and Vallee make their position clear: UFOs represent an unknown but real phenomenon. The far-reaching implications take us to the very edge of what we consider the known...