NASA homes in on sites for Mars exploration.
Reichhardt
Tony
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D001690:Biological Science Disciplines; D005118:Extraterrestrial Environment / Q000737:chemistry; D005290:Ferric Compounds / Q000032:analysis; D019015:Geologic Sediments / Q000737:chemistry; D018535:Mars; D013026:Space Flight; D014481:United States; D018557:United States National Aeronautics and Space Administration; D014867:Water / Q000032:analysis
D005290:Ferric Compounds; D014867:Water; C000499:ferric oxide