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Seller's Description:
As New in Very Good jacket. Book. 9 1/4 h x 6 1/4w. A real nice clean 227 page first edition hardcover with 1 low in number line. Dust jacket is nice but has a couple small tears that may not show in scan. The author examines the problems inherent in scanning the universe for radio or optical signals from an alien intelligence. These include the difficulty of trying to communicate with another species possessing a completely unknown form of technology and the vast distances that alien communications would have to travel to reach us.