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Possible evidence for panspermia: the labelled release experiment*

Published online by Cambridge University Press:  20 April 2007

Gilbert V. Levin
Gilbert V. Levin
Affiliation:
Spherix Incorporated, 12051 Indian Creek Court, Beltsville, MD 20705, USA e-mail: [email protected]
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Abstract

30 years after the Viking Mission landed on Mars (20 July 1976) to search for life, despite the positive findings of the Labelled Release (LR) experiment, the issue remains unresolved. The controversial history, following the immediate dismissal of the LR’s evidence for microbial activity in the Martian soil, and the later claim to its having found living microorganisms are reviewed. The bearing of post-Viking-to-current data on the issue is discussed in the context of the scientific community’s growing interest in the long-dismissed possibility of microbial life on Mars. Objections raised over the years to the biological interpretation of the Mars LR, those currently maintained, and their rebuttals are reviewed. A case is presented that enough evidence now exists for an objective review by astrobiologists to resolve this key issue, a review, surprisingly, not yet held. The results could greatly influence NASA’s currently shifting plans for Mars exploration. A variation of the LR experiment to test for chiral specificity in the metabolism of substrates by the active agent found in the Martian soil, and thus having the capability of obtaining an unambiguous answer to the life question, is proposed. Confirmation of life on Mars by this experiment can also determine whether Martian and Earth life forms share a common heritage. Together with mounting evidence for the viable transfer of microorganisms between the two planets, this would be evidence for panspermia, and establish the presence of a common biosphere in which the two planets participate. Should Martian microorganisms show a different chiral specificity than that of Earth life then this would indicate separate origins of the two neighbouring life forms, thereby strongly implying that life occurs widely throughout the cosmos. Any one of these possible outcomes would be a paradigm-breaking event.

Keywords

astrobiologyexploration of Marsextreme habitatslife on MarsMartian environmentViking Mission Labelled Release experiment
Type
Research Article
Information
International Journal of Astrobiology , Volume 6 , Issue 2 , April 2007 , pp. 95 - 108
Copyright
Copyright © Cambridge University Press 2007

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References

Cockell & Schuerger (2005). Traces of Stowaway algae could survive on Mars, study finds. Press Release, University of Florida, Gainesville, 30 May. spaceref.com.www.spaceref.com/news/viewpr.html?pid=16978Google Scholar
Encrenaz et al. (2004). Hydrogen peroxide on Mars. www.obspm.fr/actual/nouvelle/jun04/perox.en.shtml.Google Scholar
Bianciardi, G. (2004). Nonlinear analysis of the Viking Lander 2 Labelled Release data. In Proc. 3rd III Eur. Workshop on Exo-Astrobiology. Mars: The Search for Life, Madrid, Spain, ESA SP-545.Google Scholar
Biemann, K. et al. (1977). The search for organic substances and inorganic volatile compounds in the surface of Mars. J. Geophys. Res. 82, 4641.CrossRefGoogle Scholar
Cameron, R.E. & Benoit, R.E. (1970). Microbial and ecological investigations of recent cinder cones, Deception Island, Antarctica – a preliminary report. Ecology 51, 802–809.CrossRefGoogle Scholar
Cameron, R.E., King, J. & David, C.N. (1970). Antarctic Ecol. 2, 702.Google Scholar
DiGregorio, B. (2001). Rock varnish as a habitat for extant life on Mars. Proc. SPIE (Instruments, Methods, and Missions for Astrobiology) 4495(13), 120–130.Google Scholar
Formisano, V., Atreya, S., Encrenaz, T., Ignatiev, N. & Giuranna, M. (2004). Detection of methane in the atmosphere of Mars. Science 306(5702), 1758–1761.CrossRefGoogle ScholarPubMed
Glavin, D., Schubert, M., Botta, O., Kminek, G. & Bada, J.L. (2001). Detecting pyrolysis products from bacteria on Mars. Earth Planet. Sci. Lett. 185(1–2), 1–5.CrossRefGoogle Scholar
Howe, L. (2004). Formaldehyde, ammonia, and benzene molecules on Mars? Would probably mean life. www.earthfiles.com/news/printerfriendly.cfm?id=707.Google Scholar
Hubbard, J.S., Hardy, J.P. & Horowitz, N.H. (1971). Photocatalytic production of organic compounds from CO and H2O in a simulated Martian atmosphere. Proc. Natl Acad. Sci. 3, 574.CrossRefGoogle Scholar
Hubbard, J.S., Hardy, J.P., Voecks, G.E. & Golub, E.E. (1973). Photocatalytic synthesis of organic compounds from CO and water: involvement of surfaces in the formation and stabilization of products. J. Mol. Evol. 2, 149–166.CrossRefGoogle Scholar
Krasnopolsky, V.A., Bjoraker, G.L., Mumma, M.J. & Jennings, D.E. (1997). High-resolution spectroscopy of Mars at 3.7 and 8.4 μm: a sensitive search for H2O2, H2CO, HCl, and CH4, and detection of HDO. J. Geophys. Res., 102(E3), 6525–6534.CrossRefGoogle Scholar
Krasnopolsky, V.A. & Feldman, P.D. (2001). Detection of molecular hydrogen in the atmosphere of Mars. Science 294, 1914–1917.CrossRefGoogle ScholarPubMed
Levin, G.V. (2005). Presentation at Cosmos Club Seminar, Washington, DC.Google Scholar
Levin, G.V. (2006). Modern myths of Mars. Proc. SPIE (Instruments, Methods, and Missions for Astrobiology) 6309, 6309OC.Google Scholar
Levin, G., Kuznetz, L. & Lafleur, A. (2000). Approaches to resolving the question of life on Mars. Proc. SPIE (Instruments, Methods, and Missions for Astrobiology) 4137, 48–62.CrossRefGoogle Scholar
Levin, G.V. & Straat, P.A. (1979). Completion of the Viking Labelled Release Experiment on Mars. J. Mol. Evol. 14, 167–183.CrossRefGoogle ScholarPubMed
Levin, R.L. & Weatherwax, J.L. (2003). Liquid water on Mars. Proc. SPIE (Instruments, Methods, and Missions for Astrobiology) 5163, 145–157.CrossRefGoogle Scholar
Moore, H.J., Hutton, R.E., Scott, R.F., Spitzer, C.R. & Shorthill, R.W. (1977). Surface materials of the Viking landing sites. J. Geophys. Res. 82(28), 4497–4523.CrossRefGoogle Scholar
Navarro-Gonzalez, R. et al. (2006). The limitations on organic detection in Mars-like soils by thermal volatilization–gas chromatography–MS and their implications for the Viking results. Proc. Nat. Ac. Sc. 103, 16089–16094; published online before print as 10.1073/pnas.0604210103.CrossRefGoogle ScholarPubMed
Ryan, S., Dlugokencky, E.J., Tans, P.P. & Trudeau, M.E. (2006). Mauna Loa volcano is not a source of atmospheric methane: implications for Mars, GRL. In The Study of Mona Loa, 2006.Google Scholar
Sherriff, L. (2006). Shiny rocks could hold evidence of Martian life. The Register. July 4, Science section, UK.Google Scholar
Whitehouse, D. (2000). BBC News Online, 10 July 2000.Google Scholar
Whitehouse, D. (2004). Ammonia may have been found in Mars’ atmosphere which some scientists say could indicate life on the Red Planet. BBC News Online, reported in BBC News, 15 July 2004.Google Scholar