title: The Martian atmosphere: some unanswered questions.
abstract: The study of the Martian atmosphere and its significance for the possible origin of life on Mars is still very incomplete. Further investigations are needed to define the total volatile inventory, the early history of the atmosphere, and the relationship of the atmosphere to the question of indigenous life. In addition, studies of Venus, comets, and the Jupiter system will add significantly to our abilities to understand the early history of Mars.
mesh_terms: D002244:Carbon / Q000032:analysis; D005118:Extraterrestrial Environment; D009584:Nitrogen / Q000032:analysis; D000069497:Origin of Life; D010100:Oxygen / Q000032:analysis; D012987:Soil / Q000032:analysis
chemical_list: D012987:Soil; D002244:Carbon; D009584:Nitrogen; D010100:Oxygen