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Journalists wearing face masks to prevent the spread of the coronavirus take photos of a model of China's Chang'e 5 lunar orbiter and lander before a press conference at the State Council Information Office in Beijing, Thursday, December 17, 2020. Following the successful return of moon rocks by its Chang'e 5 robotic probe, China is preparing for future missions that could set the stage for an eventual lunar base to host human explorers. (Photo by Mark Schiefelbein/AP Photo)
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