The case for relic life on Mars.
Gibson
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EK
National Aeronautics and Space Administration, Johnson Space Center, Houston, Tex., USA.
McKay
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DS
Thomas-Keprta
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K
Romanek
C S
CS
D000864:Antarctic Regions; D002254:Carbonates / Q000032:analysis*; D004783:Environmental Microbiology; D019419:Evolution, Planetary; D018559:Exobiology; D005118:Extraterrestrial Environment; D005580:Fossils; D019015:Geologic Sediments / Q000032:analysis / Q000382:microbiology*; D018535:Mars; D019110:Meteoroids; D010103:Oxygen Isotopes; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis; D014867:Water / Q000032:analysis
D002254:Carbonates; D010103:Oxygen Isotopes; D011084:Polycyclic Aromatic Hydrocarbons; D014867:Water