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No. 65: Sep-Oct 1989

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Fossil from mars?

Who would have thought that the dreary Antarctic wastes would harbor a piece of Mars, much less a fossil of Martian life? Yet, British scientists, I.P. Wright et al, in Nature, come close to such a conclusion.

"The meteorite EETA 79001, which many believe to have originated on Mars, contains carbonate minerals thought to be Martian weathering or alteration products. Accompanying the carbonates are unexpectedly high concentrations of organic materials (defined here as carbonaceous matter that has a low stability towards oxidation, and so combusts at less than 600C; the term 'organic' does not necessarily imply an origin by biogenic processes.) Although the carbon isotope composition of these materials is indistinguishable from terrestrial biogenic components, and so cannot be used to assess the source, we argue here that their occurrence in an interior sample of a clean Antarctic meteority militates against a wholly terrestrial origin. A sample of Martian organic materials may thus be available for further study in the laboratory."

(Wright, I.P., et al; "Organic Materials in a Martian Meteorite," Nature, 340: 220, 1989.)

But there are many "buts":

  1. Meteorite EETA 79001 may not have come from Mars after all, even though many scientists think it did.

  2. The organic material in EETA 79001 may have come instead from the comet that supposedly blasted the meteorite into space from the Martian surface, although the carbon-isotope ratios do not favor a cometary origin.

  3. The organic material may only be terrestrial contamination, despite the careful handling of the meteorite.

Nevertheless, EETA 79001 has revived speculation about life on Mars. Could not the calcium carbonate, for example, have come from the shell of some Martian water creature? I.P. Wright does not avoid this possibility.

"There is a remote chance that we're looking at some (extraterrestrial) fossil life form."

(Amato, I.; "Meteorite May Carry Organic Martian Cargo," Science News, 136:53, 1989.)

From Science Frontiers #65, SEP-OCT 1989. 1989-2000 William R. Corliss

Science Frontiers Sourcebook Project Reviewed in:

Quotes

  • "A sourcebook of unexplained phenomena is therefore a valuable addition to a collection of scientific literature. William R. Corliss has provided this in the past with his source books of scientific anomalies in several subjects, and now he has provided it for astronomy. He has done an excellent job of collecting and editing a large amount of material, taken in part from scientific journals and in part from scientific reporting in the popular or semi-scientific press." -- "The Mysterious Universe: A Handbook of Astronomical Anomalies", reviwed by Thomas Gold, Cornell University, in Icarus, vol.41, 1980

  • "An interesting, systematic presentation of unusual weather [..] This book is recommended for a general audience" --"Corliss, William R., Tornados, Dark Days, Anomalous Precipitation, and Related Weather Phenomena, Sourcebook Project, 1983.", revieweed in Choice, September 1983
  • "..the science is necessarily somewhat speculative, but Corliss's symthesis is based on reputable sources." -- "Corliss, William R. (Compiler). Lightning, Auroras, Nocturnal Lights, and Related Luminous Phenomena" reviwed by Joseph M. Moran, Univ. of Wisconsin in Science Books and Films, Sep/Oct 1983

  • "Before opening the book, I set certain standards that a volume which treads into dangerous grounds grounds like this must meet. The author scrupulously met, or even exceeded those standards. Each phenomenon is exhaustively documented, with references to scientific journals [..] and extensive quotations" -- "Book Review: The moon and planets: a catalog of astronomical anomalies", The Sourcebook Project, 1985., Corliss, W. R., Journal of the Royal Astronomical Society of Canada, Vol. 81, no. 1 (1987), p. 24., 02/1987