MarsUnited States National Aeronautics and Space AdministrationSpace FlightSpacecraftAstronautsExtraterrestrial EnvironmentCosmic RadiationWeightlessnessNitrate ReductaseExobiologyDry IceEvolution, PlanetarySorption DetoxificationMeteoroidsAtmosphereNitratesIceMatrix Attachment RegionsNuclear MatrixSilicatesIron CompoundsMagnesium CompoundsRadarGeological PhenomenaSpectrometry, GammaWaterElementary Particle InteractionsGeologyMatrix Attachment Region Binding ProteinsLiver FailureLiver Failure, Acute