研究人员说几乎没有证据表明火星上有石灰石岩层,该发现表明这个红色星球上从来没有海洋。但是,专家们说,这个结论并不影响火星上存在生命的可能性。亚利桑那州立大学的菲利普·克里斯滕森指出,美国航空及太空总署的火星全球探测器 The researchers said that there is almost no evidence that there is a limestone rock on Mars. The discovery shows that there is never an ocean on this red planet. However, experts said that this conclusion does not affect the possibility of life on Mars. Philip Kristensen of Arizona State University pointed out that the United States National Aeronautics and Space Administration’s Mars Global Detector