Life on Earth-and Beyond: An Astrobiologist's Quest by Pamela S. TurnerAstrobiologists have searched Earth's most extreme environments in their quest to understand what factors are necessary to sustain life.

Dr. Chris McKay's scientific journey has taken him from the freezing cold of Antarctica's Dry Valleys to the rocky wasteland of the Atacama Desert in Chile to the permafrost-covered tundra of Siberia. By studying environments on Earth that resemble those on Mars and other planets, Dr. McKay hopes that his experiments will help answer the question: can life exist beyond Earth?