It is statistically unlikely that humans are the only intelligent species in the universe. Nothing about the others will be known until contact is made beyond a

Draws on extensive knowledge of contemporary physics and astronomy to describe the latest attempts to locate extraterrestrials and to explore the philosophical

This book describes a wide variety of speculations by many authors about the consequences for humanity of coming into contact with extraterrestrial intelligence

This book describes a wide variety of speculations by many authors about the consequences for humanity of coming into contact with extraterrestrial intelligence

Examines in detail the psychological, sociological, political, and cultural dimensions of the search for extraterrestrial intelligence.