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Science 5 May 2006:
Vol. 312. no. 5774, pp. 708 - 709
DOI: 10.1126/science.1111863
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Perspectives

GEOCHEMISTRY:
Follow the Nitrogen

Douglas G. Capone, Radu Popa, Beverly Flood, Kenneth H. Nealson

On Mars, the jovian satellites, and other planetary bodies, nitrogen species may provide important clues to the presence of life.

D. G. Capone and B. Flood are in the Department of Biological Sciences, and K. H. Nealson is in the Department of Earth Sciences, University of Southern California, Los Angeles, CA 90089, USA. R. Popa is in the Department of Biology, Portland State University, Portland, OR 97207, USA. E-mail: knealson{at}usc.edu

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Coupling between Biota and Earth Materials in the Critical Zone.
R. Amundson, D. D. Richter, G. S. Humphreys, E. G. Jobbagy, and J. Gaillardet (2007)
Elements 3, 327-332
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Science. ISSN 0036-8075 (print), 1095-9203 (online)