How Scott Kelly’s year in space may have changed his body
发布时间 2016-03-01 15:00:02 来源
摘要
NASA astronaut Scott Kelly is returning to Earth today, after spending nearly a year aboard the International Space Station. The idea behind his extended stay is to help NASA better prepare for trips into deep space. The microgravity environment can have some interesting effects on the human body, and NASA wants to know how astronauts will fare on lengthy missions to Mars.
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