One of the most intriguing puzzles of human history - with deep implications for our understanding of the Universe and ourselves, is the possibility that humans... » 

One of the most intriguing puzzles of human history - with deep implications for our understanding of the Universe and ourselves, is the possibility that humans are not alone in the Universe and might someday come into contact with other intelligences. This interdisciplinary book probes the subject, offering scientific and technological implications, discussing the philosophical and religious connotations and rebuffing pseudo-scientific assertions such as rare earth. «