title: Planetary Science. 'Fixed' nitrogen found in martian soil.
authors: Eric
authors: E
authors: Hand
mesh_terms: D018559:Exobiology; D018535:Mars; D009584:Nitrogen / Q000032:analysis*; D009586:Nitrogen Fixation; D012987:Soil / Q000737:chemistry*
chemical_list: D012987:Soil; D009584:Nitrogen