Are we alone in the universe? This is surely one of the biggest questions of human existence, yet it remains frustratingly unanswered. In this provocative book, one of the world"s leading scientists explains why the search for intelligent life beyond Earth should be expanded, and how it can be done. Fifty years ago, a young astronomer named Frank Drake first pointed a radio telescope at nearby stars in the hope of picking up a signal from an alien civilization. Thus began one of the boldest scientific projects in history, the Search for Extraterrestrial Intelligence (SETI). After a half-century of scanning the skies, however, astronomers have little to report but an eerie silence-eerie because many scientists are convinced that the universe is teeming with life. Could it be, wonders physicist and astrobiologist Paul Davies, that we"ve been looking in the wrong place, at the wrong time, and in the wrong way? Davies has been closely involved with SETI for three...