Machine generated contents note: 1.Where Is Everybody? -- 2.Of Fermi and Paradox -- The Physicist Enrico Fermi -- Paradox -- The Fermi Paradox -- 3.They Are (or Were) Here -- Solution 1 They Are Here and They Call Themselves Hungarians -- Solution 2 They Are Here and They Call Themselves Politicians...

Contents note continued: Solution 17 We Are Solar Chauvinists -- Solution 18 Aliens Are Green -- Solution 19 They Stay at Home -- Solution 20 And Surf the Net -- Solution 21 Against the Empire -- Solution 22 Bracewell--von Neumann Probes -- Solution 23 Information Panspermia -- Solution 24 Berserker...

Contents note continued: Solution 37 Ouch Apocalypse! -- Solution 38 Heat Wave -- Solution 39 Apocalypse When? -- Solution 40 Cloudy Skies Are Common -- Solution 41 As Good as it Gets -- Solution 42 They Are Distance Learners -- Solution 43 They Are Somewhere but the Universe is Stranger Than We Ima...

Contents note continued: Solution 57 Continuously Habitable Zones Are Narrow -- Solution 58 Earth is the First -- Solution 59 Earth has an Optimal "Pump of Evolution" -- Solution 60 The Galaxy is a Dangerous Place -- Solution 61 A Planetary System is a Dangerous Place -- Solution 62 Earth's System o...