By studying bacteria that flourish in the oxygen-freewater, scientists hope, among other things, to learn how simple life-forms can lead to more complex ones.
通过研究这些生活在无氧环境下细菌，科研人员希望了解这些简单的生物是如何进化成更为复杂的生物的。
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Status: Last year, scientists found a plentiful raw material that can freeoxygen from water.
现状：去年，科学家发现大量能把氧气从水中释放出来的原材料。
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It is the only planet known to have an atmosphere containing freeoxygen, oceans of liquid water on its surface, and, of course, life.