title: My favorite Martians:  NASA uncovers evidence of ancient life on Mars.
authors.forename: P
authors.initials: P
authors.lastname: Dasch
authors.forename: J
authors.initials: J
authors.lastname: Kross
mesh_terms: D000864:Antarctic Regions; D002254:Carbonates / Q000737:chemistry; D019418:Evolution, Chemical; D019419:Evolution, Planetary; D018559:Exobiology; D005580:Fossils; D018535:Mars; D019110:Meteoroids; D008855:Microscopy, Electron, Scanning; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis; D014481:United States; D018557:United States National Aeronautics and Space Administration
chemical_list: D002254:Carbonates; D011084:Polycyclic Aromatic Hydrocarbons