have been identified in samples of meteorites collected in the field and/or stored in museums (see, e.g., Claus and Nagy, 1962). Although such claims have attracted considerable attention, subsequent investigations have shown in all cases that the putative microfossils were either terrestrial contaminants or abiotically produced indigenous mineral structures (see, e.g., Rossignol-Strick and Barghoorn, 1971). There is at present no evidence for any organisms of extraterrestrial origin in meteorites from planetary satellites or small solar system bodies.

REFERENCES

Cairns-Smith A.G. 1982. Genetic Takeover and the Mineral Origins of Life. Cambridge, England: Cambridge University Press.

Crick, F.H.C., and L.E. Orgel. 1973. Directed panspermia. Icarus 19:341-346.

Claus, G., and B. Nagy. 1962. Microfossils, new science, resembling algae and flagellates, found in meteorites. Pollen Spores 4:339.


Gold, T. 1960. Space garbage. Air Force and Space Digest, May, p. 65.


Hahn, O. 1880. Die meteorite (chrondrite) und ihre organismen/dargestellt und beschreiben von Otto Hahn, Litchtdruck von Martin Rommel in Stuttgart. Tubingen: H. Laupp'schen Buchhandlung.

Hoyle, R., and N.C. Wickramasinghe. 1986. The case for life as a cosmic phenomenon. Nature 322:510.


Oparin, A.I. 1957. The Origins of Life on Earth. New York: Academic Press.


Rossignol-Strick, M., and E.S. Barghoorn. 1971. Extraterrestrial abiogenic organization of organic matter: The hollow spheres of the Orgueil meteorite. Space Life Sci. 3:89-107.



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