Newman, Dianne K. and Orphan, Victoria J. and Reysenbach, Anna-Louise (2012) Molecular biology's contributions to geobiology. In: Fundamentals of Geobiology. Wiley-Blackwell , Hoboken, NJ, pp. 228-249. ISBN 9781118280812 http://resolver.caltech.edu/CaltechAUTHORS:20121106-134254144
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On August 7, 1996, US President Bill Clinton held a press conference to announce the possibility that the Allan Hills 84001 meteorite might provide insight into ancient life on Mars. With soaring rhetoric, he declared: 'Today, rock 84001 speaks to us across all those billions of years and millions of miles. It speaks of the possibility of life. If this discovery is confirmed, it will surely be one of the most stunning insights into our universe that science has ever uncovered. Its implications are as far-reaching and awe-inspiring as can be imagined. Even as it promises answers to some of our oldest questions, it poses still others even more fundamental.' Shortly thereafter, NASA expanded its support for astro-and geobiological research, which marked the beginning of a renaissance in geobiology. Seemingly overnight, geobiology was transformed from a somewhat arcane discipline to a glamorous field that promised to reveal the secrets of life. While today, most geobiologists would agree that the evidence for past life in AH84001 is inconclusive at best, and find the hype surrounding its discovery to be comical, nonetheless, the excitement it engendered has had a long-lasting and positive impact on our science. The enduring consequence of Clinton's press conference was that it called attention to the fact that life has been leaving signatures in its environment (be it earthly or extraterrestrial) for billions of years. In the years following the meteorite's discovery, it has become clear that to understand life's traces and-more importantly---effects on its environment, it is necessary to understand how life leaves its imprint and whether this can be distinguished from similar imprints left by abiotic processes. This is a central challenge in geobiology.
|Item Type:||Book Section|
|Additional Information:||© 2012 Blackwell Publishing Ltd. Published 2012 by Blackwell Publishing Ltd. The authors gratefully acknowledge the Howard Hughes Medical Institute (D.KN.), Gordon and Betty Moore Foundation and DOE Early Career Grant (V.J.O.), and NSF OCE-0937404 (A.L.R) for support. We also thank our students, postdocs, and colleagues for shaping our thinking on these topics over the years.|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||09 Nov 2012 23:09|
|Last Modified:||23 Aug 2016 10:21|
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