Life in the Universe takesnon-science majors on a journey through the solar system andbeyond, using a rigorous yet accessible introduction to astronomy,biology, and geology to explain natural phenomena and to exploreprofound scientific questions about astrobiology. The ThirdEdition has been thoroughly revised to include updatedscientific discoveries, new Cosmic Context two-page spreads, and anupdated Companion Website.Designed for astrobiology courses but alsosuitable for introductory astronomy courses, Life in theUniverse captures your imagination by exploring fundamentalpan-scientific What is life? How did life begin onEarth? What are the most extreme forms of life currently known? Isit reasonable to imagine life beyond Earth?The text motivates you to develop basicreasoning skills and an understanding of the process of sciencethrough skillful writing and a wealth of pedagogical features, suchas Learning Goals that keep you focused on key concepts. Sidebarsprovide optional mathematical material for courses that fulfillquantitative requirements.