Brendan Byrne
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Since touching down in Jezero Crater, NASA's Perseverance rover has already cached 6 samples that could one day be brought back to Earth. Astrobiologists hope they hold signs of past microbial life.
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In the latest step in the commercialization of space, the four-member crew of the SpaceX mission launched from the Kennedy Space Center Wednesday night. The astronauts will land off the Florida coast.
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