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Joel Levine：为什么我们要重返火星
829,735 views |
Joel Levine |
TEDxNASA
• November 2009
Read transcript
在TED的NASA，行星科学家Joel Levine展现了一些奇妙且费解关于火星的新发现：被冰层覆盖的环形山、古海洋的遗迹，古代生命存在的强烈迹象。他规划返回火星，探寻更多。
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