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NASA科学家在2009年1月宣布,有关火星大气中甲烷活动的第一份权威证据表明,火星并非一颗死星——从生物学意义上看,火星上可能有生命;从地质学意义上说,火星依然活跃。
NASA scientists announced in January 2009 that the first authoritative evidence of methane activity in the Martian atmosphere suggests that Mars is not a dead planet - in the biological sense, there may be life on Mars; geologically speaking Mars is still active.