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37. See, for example, M.H. Carr, The Surface of Mars, Cambridge University Press, New York, N.Y. 2006; and references therein.

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57. M.D. Brasier, O.R. Green, A.P. Jephcoat, A.K. Kleppe, M.J. Van Kranendonk, J.F. Lindsay, A. Steele, and N.V. Grass-ineau, "Questioning the Evidence for Earth's Oldest Fossils," Nature 416:76-81, 2002.

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60. H. Furnes, N.R. Banerjee, K. Muehlenbachs, H. Staudigel, and M. de Wit, "Life Recorded in Archean Pillow Lavas," Science 304:578, 2004.

61. See, for example, R.A. Kerr, "Reversals Reveal Pitfalls in Spotting Ancient and E.T. Life," Science 296:1384-1385, 2002.

62. See, for example, R. Dalton, "Microfossils: Squaring Up Over Ancient Life," Nature 417:782-784, 2002.

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67. M.D. Brasier, O.R. Green, A.P. Jephcoat, A.K. Kleppe, M.J. Van Kranendonk, J.F. Lindsay, A. Steele, and N.V. Grass-ineau, "Questioning the Evidence for Earth's Oldest Fossils," Nature 416:76-81, 2002.

68. J.W. Schopf, A.B. Kudryavtsev, D.G. Agresti, T.J. Wdowiak, and A.D. Czaja, "Laser-Raman Imagery of Earth's Oldest Fossils," Nature 416:73-76, 2002.

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