Five ways to spot when a paper is a fraud

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This is the moment a SpaceX capsule left the International Space Station on an emergency return flight to Earth prompted by a medical issue afflicting one of the astronauts. It is Nasa’s first medical evacuation, with the mission being cut a month short. Onboard were American astronauts Mike Fincke and Zena Cardman, a Russian cosmonaut Oleg Platonov, and a Japanese astronaut Kimiya Yui. Computer modelling predicted a medical evacuation from the space station every three years but Nasa has not had one before in its 65 years of human spaceflight

12月22日,中国非物质文化遗产馆,市民在窗花展区拍照留念。12月21日,“过年——春节主题展”在中国非物质文化遗产馆对公众开放,本次主题展展览面积2600平方米,共展示120余项与春节相关的非物质文化遗产代表性项目,以春节期间重要时间节点为线索,串联起与春节相关的不同地区的非物质文化遗产代表性项目。新京报记者 王飞 摄影报道SourcePh" style="display:none"

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