Martian rocks tell divergent stories.
Kerr
R A
RA
D000596:Amino Acids / Q000032:analysis; D000864:Antarctic Regions; D002244:Carbon / Q000032:analysis; D002247:Carbon Isotopes; D018559:Exobiology; D018535:Mars; D019110:Meteoroids; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis
D000596:Amino Acids; D002247:Carbon Isotopes; D011084:Polycyclic Aromatic Hydrocarbons; D002244:Carbon