title: NASA missions bid for extensions.
authors.forename: Alexandra
authors.initials: A
authors.lastname: Witze
mesh_terms: D005101:Expeditions / Q000191:economics / Q000639:trends; D005118:Extraterrestrial Environment / Q000737:chemistry; D018535:Mars; D013026:Space Flight / Q000191:economics* / Q000295:instrumentation / Q000639:trends*; D014481:United States; D018557:United States National Aeronautics and Space Administration / Q000191:economics*; D014867:Water / Q000032:analysis
chemical_list: D014867:Water