References

1. P.J. Boston, M.V. Ivanov, and C.P. McKay, "On the Possibility of Chemosynthetic Ecosystems in Subsurface Habitats on Mars," Icarus 95:300-308, 1992.

2. D.S. McKay, E.K. Gibson, Jr., K.L. Thomas-Keprt, H. Vali, C.S. Romanek, S.J. Clemett, X.D.F. Chillier, C.R. Maechling, and R.N. Zare, "Search for Past Life on Mars: Possible Relic Biogenic Activity in Martian Meteorite ALH 84001," Science 273:924-930, 1996.

3. National Aeronautics and Space Administration, Astrobiology Roadmap: September 2003, National Aeronautics and Space Administration, Washington, D.C., 2003.

4. MEPAG (Mars Exploration Program Analysis Group), "Scientific Goals, Objectives, Investigations, and Priorities," Science Planning for Exploring Mars, JPL Publication 01-7, 2001, available at http://mepag.jpl.nasa.gov/reports/index.html.

5. MEPAG, "Mars Scientific Goals, Objectives, Investigations, and Priorities: 2006," white paper, J. Grant, ed., 31 p., February 2006, available at http://mepag.jpl.nasa.gov/reports/index.html.

6. National Aeronautics and Space Administration, The Vision for Space Exploration: February 2004, National Aeronautics and Space Administration, Washington, D.C., 2004.

7. National Research Council, An Assessment of Balance in NASA's Science Programs, The National Academies Press, Washington, D.C., 2006, pp. 20-21.

8. National Research Council, New Frontiers in the Solar System: An Integrated Exploration Strategy, The National Academies Press, Washington, D.C., 2003.

9. National Aeronautics and Space Administration, An Exobiology Strategy for Mars Exploration, National Aeronautics and Space Administration, Washington, D.C., 1995.

10. See, for example, National Research Council, New Frontiers in the Solar System: An Integrated Exploration Strategy, The National Academies Press, Washington D.C., 2003.

11. See, for example, National Research Council, Assessment of Mars Science and Mission Priorities, The National Academies Press, Washington D.C., 2001.

12. See, for example, National Research Council, Assessment of NASA's Mars Architecture 2007-2016, The National Academies Press, Washington D.C. 2006.

13. National Research Council, Limits of Organic Life in Planetary Systems, The National Academies Press, Washington D.C., 2007.

14. See, for example, N.R. Pace, "The Nature of Biochemistry in the Universe," and S.A. Benner, "Chance and Necessity in Biomolecular Chemistry: Is Life as We Know It Universal?" pp. 59-63 and 64-67 in National Research Council, Signs of Life: A Report Based on the April 2000 Workshop on Life Detection Techniques, The National Academies Press, Washington, D.C., 2002.

15. For a recent scientific discussion of some of the possibilities see, for example, D. Schulze-Makuch and L.N. Irwin, Life in the Universe: Expectations and Constraints, Springer, New York, 2004.

Was this article helpful?

0 0

Post a comment