Astrobiology: An Overview; Aaron David GoldmanOrigin of Elements and Formation of Solar System, Planets, and Exoplanets; Ken RiceAstrobiology Education and Public Outreach; Timothy F. SlaterAnalysis of Extraterrestrial Organic Matter in Murchison Meteorite: A Progress Report; Philippe Schmitt-Kopplin, Mourad Harir, Basem Kanawati, Régis Gougeon, Franco Moritz, Norbert Hertkorn, Sonny Clary, Istvan Gebefügi,and Zelimir GabelicaPrebiotic Synthesis of Biochemical Compounds: An Overview; Henderson James (Jim) CleavesBiochemical Pathways as Evidence for Prebiotic Syntheses; Gene D. McDonaldRoles of Silicon in Life on Earth and Elsewhere; Joseph B. Lambert and Senthil Andavan Gurusamy-ThangaveluFossil Records for Early Life on Earth; David WaceyPrebiotic Chemistry: In Water and in the Solid State; Vera M. KolbEncapsulation of Organic Materials in Protocells; Erica A. Frankel, Daniel C. Dewey, and Christine D. KeatingRole of Phosphorus in Prebiotic Chemistry; Matthew PasekCold and Dry Limits of Life; Christopher P. McKay, Alfonso F. Davila, and Henry J. SunMicroorganisms in Space; Gerda Horneck and Ralf MoellerSearch for Life on Mars: An Astrogeological Approach; Jesús Martínez-FríasElusive Definition of Life: A Survey of Main Ideas; Radu PopaLanguage and Communication as Universal Requirements for Life; Guenther WitzanyTransition from Abiotic to Biotic: Is There an Algorithm for It?; Sara Imari WalkerExtraterrestrial Life: What Are We Looking For?; Dirk Schulze-Makuch, Louis N. Irwin, and Alberto G. FairénEvolutionary Approach to Viruses in Astrobiology; Matti Jalasvuori and Jaana K.H. BamfordVirolution Can Help Us Understand the Origin of Life; Luis P. VillarrealCan Virolution Help Us Understand Recent Human Evolution?; Luis P. Villarreal Index