行星科学家Joel Levine为我们带来了有关火星的一些奇妙的新发现:被冰层覆盖的环形山、古海洋的遗迹、大量甲烷的存在——这意味着在火星上可能曾经存在生命。那么解开火星之谜的最好方法是什么?科学家们十几年前就提出了这个问题,而近期的一次会议上,10位顶尖科学家提出了用新式的火箭动力机器人飞船来近距离探索火星。哇哦,想想就很酷!要知道在去年底,美国的“猎户座”太空飞船在佛罗里达州卡纳维拉尔角基地发 Planetary scientist Joel Levine brings us some wonderful new discoveries about Mars: craters covered by ice, the remains of ancient oceans, the presence of large amounts of methane - which means there may have been life on Mars. So what’s the best way to solve Mars’s mystery? Scientists raised the issue more than a decade ago, and at a recent conference, 10 top scientists proposed using a new rocket powered robotic spacecraft to explore Mars at close range . Wow, think cool! To know that at the end of last year, the U.S. “Orion” spacecraft was based in Cape Canaveral, Florida