The Mystery of Mars' Raging Rivers

KOREY HAYNES

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The Mystery of Mars' Raging Rivers

机译：火星汹涌的河流之谜

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>Mars, it now seems, was once a very wet world. A new global study of ancient riverbeds on the Red Planet shows they're wider than Earth rivers, on average, and once carried large volumes of water across the planet. Scientists were surprised to find they also flowed recently, perhaps within the past billion years. That's well after astronomers think Mars began losing its atmosphere to space, causing the world to dry out. It's not clear how a planet with minimal sunlight and a slight atmosphere stayed warm enough to host even a little surface water — let alone fast-flowing rivers.

机译：>现在看来，火星曾经是一个非常潮湿的世界。一项关于“红色星球”上古代河床的全球最新研究表明，它们平均比地球上的河流要宽，并且曾经在地球上运送大量水。科学家惊讶地发现它们也可能在过去的十亿年之内流动了。天文学家认为火星开始失去其大气层进入太空，导致世界干well之后，这已经很久了。目前尚不清楚，具有最小日照和轻微大气的行星如何保持足够温暖以容纳甚至很少的地表水，更不用说快速流动的河流了。

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《Discover》 |2020年第1期|72-72|共1页
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KOREY HAYNES;
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The Mystery of Mars' Raging Rivers

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