title: Did Mars once harbor life?
authors.affiliation: NASA Ames Research Center, Moffett Field, CA, USA.
authors.forename: J
authors.initials: J
authors.lastname: Farmer
mesh_terms: D018559:Exobiology / Q000639:trends*; D005580:Fossils; D018535:Mars; D000069497:Origin of Life; D013026:Space Flight / Q000639:trends