title: Life on Mars may be hidden like Earth's extremophiles.
authors: Samuel
authors: S
authors: Kounaves
mesh_terms: D001407:Bacillus / Q000302:isolation & purification; D018534:Earth, Planet; D018559:Exobiology / Q000295:instrumentation / Q000379:methods*; D005118:Extraterrestrial Environment; D005843:Geography; D018535:Mars; D018531:Spacecraft; D014768:Virginia