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Given the fundamental importance of and universal interest in whether extraterrestrial life has developed or could eventually develop in our solar system and beyond, it is vital that an examination of planetary habitability goes beyond simple assumptions such as, "Where there is water, there is life." This book has resulted from a workshop at the International Space Science Institute (ISSI) in Bern, Switzerland (5-9 September 2005) that brought together planetary geologists, geophysicists, atmospheric scientists, and biologists to discuss the multi-faceted problem of how the habitability of a planet co-evolves with the geology of the surface and interior, the atmosphere, and the magnetosphere.
Each of the six chapters has been written by authors with a range of expertise so that each chapter is itself multi-disciplinary, comprehensive, and accessible to scientists in all disciplines. These chapters delve into what life needs to exist and ultimately to thrive, the early environments of the young terrestrial planets, the role of volatiles in habitability, currently habitable (but possibly not inhabited) geologic environments, the connection between a planet's inner workings and the habitability of its surface, and the effects on planetary atmospheres of solar evolution and the presence or absence of a magnetosphere.
This book serves as a useful reference for those who plan missions that will hunt for biomarkers (especially on Mars), for biologists and geoscientists who seek a broader view of the story, and for researchers and upper level students interested in an in-depth review of the geologic evolution of terrestrial planets, from their cores to their magnetospheres, and how that evolution shapes the habitability of the planetary surface.
Reprint from Space Science Reviews journal, Vol. 129/1-3, 2007
A Multidisciplinary Approach to Habitability.- Fundamental Requirements for Life.- Emergence of a Habitable Planet.- Creating Habitable Zones At All Scales, From Planets to Muds, on Earth and on Mars.- Conversation on the Habitability of Worlds: The Importance of Volatiles.- Water, Life, and Planetary Geodynamical Evolution.- Introduction to Chapter 6.- Chapter 6, Part 1: A Comparative Study of the Influence of the Active Young Sun on the Early Atmospheres of Earth, Mars, and Venus.- Chapter 6, Part 2: Planetary Magentic Fields and Solar Forcing: Implications for Atmospheric Evolution.- Chapter 6, Part 3: Planetary Magnetic Dynamo Effect on Atmospheric Protection of Early Earth and Mars.- EpilogueThe Origins of Life in the Solar System and Future Exploration.