Where Is Everybody?: Fifty Solutions to the Fermi Paradox and the Problem of Extraterrestrial Life
Stephen Webb

During a lunchtime conversation at Los Alamos more than 50 years ago, four world-class scientists agreed, given the size and age of the Universe, that advanced extraterrestrial civilizations had to exist. The sheer numbers demanded it. But one of the four, the renowned physicist and back-of-the-envelope calculator Enrico Fermi, asked the telling questions: If the extraterrestrial life proposition is true, he wondered, "Where is everybody?"" "In this book, Stephen Webb presents a detailed discussion of the 50 most cogent and intriguing answers to Fermi's famous question.