Life in the Universe provides an ideal starting point for non-science majors intrigued by the latest discoveries about life in the solar system and beyond. Rigorously researched and accessible to students of all backgrounds, the text introduces concepts drawn from astronomy, biology, and geology to explain natural phenomena and to explore profound scientific questions about astrobiology. The Fourth Edition has been thoroughly revised and updated to include the latest scientific discoveries and advancements, including new information regarding extrasolar planets, artificial life, and early life on Earth.

Designed for courses in astrobiology, Life in the Universe arouses students' natural curiosity by exploring fundamental questions such as: How did life begin on Earth? What are the most extreme forms of life currently known? What do we know about the possibility of life beyond Earth?

The text encourages non-science majors to develop an understanding of the process of science through its inherently compelling subject matter as well as its wealth of engaging features, including Learning Goals, Special Topics, and connections to popular culture. Sidebars provide optional mathematical material for courses that fulfill quantitative requirements.