The Limits of Organic Life in Planetary Systems

The Limits of Organic Life in Planetary Systems
-8POSN8AkJ8C
116
By:"Committee on the Limits of Organic Life in Planetary Systems","Committee on the Origins and Evolution of Life","Space Studies Board","Board on Life Sciences","Division on Engineering and Physical Sciences","Division on Earth and Life Studies","National Research Council"
"Science"
Published on 2007-06-26 by National Academies Press

Committee on the Limits of Organic Life in \u003cb\u003ePlanetary Systems\u003c/b\u003e, Committee on the \u003cbr\u003e\nOrigins and Evolution of Life, Space ... ideas through \u003cb\u003escience fiction\u003c/b\u003e and \u003cbr\u003e\nnonfiction, such as Peter Ward's Life as We Do Not Know It.2 The public and the \u003cbr\u003e\nscientific ...

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The search for life in the solar system and beyond has to date been governed by a model based on what we know about life on Earth (terran life). Most of NASA's mission planning is focused on locations where liquid water is possible and emphasizes searches for structures that resemble cells in terran organisms. It is possible, however, that life exists that is based on chemical reactions that do not involve carbon compounds, that occurs in solvents other than water, or that involves oxidation-reduction reactions without oxygen gas. To assist NASA incorporate this possibility in its efforts to search for life, the NRC was asked to carry out a study to evaluate whether nonstandard biochemistry might support life in solar system and conceivable extrasolar environments, and to define areas to guide research in this area. This book presents an exploration of a limited set of hypothetical chemistries of life, a review of current knowledge concerning key questions or hypotheses about nonterran life, and suggestions for future research.

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