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Science 15 April 2005:
Vol. 308. no. 5720, pp. 366 - 367
DOI: 10.1126/science.1107227
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Perspectives

EVOLUTION:
Life on the Early Earth: A Sedimentary View

Frances Westall

The study of microfossils (fossils of microorganisms) from ancient sediments such as those in Australia and South Africa have yielded much information about life on the early Earth. In her Perspective, Westall discusses the pressing questions that still need to be answered, which include how to distinguish between biogenic (life) and abiogenic (nonlife) signatures left behind in the sediments harboring microfossils

The author is at the Centre de Biophysique Moléculaire, CNRS, Rue Charles Sadron 45071 Orléans cedex 2, France. E-mail: westall{at}cnrs-orleans.fr

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Nanoscale detection of organic signatures in carbonate microbialites.
K. Benzerara, N. Menguy, P. Lopez-Garcia, T.-H. Yoon, J. Kazmierczak, T. Tyliszczak, F. Guyot, and G. E. Brown Jr. (2006)
PNAS 103, 9440-9445
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Science. ISSN 0036-8075 (print), 1095-9203 (online)