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Meet Kate Rubins, a virus-hunter turned astronaut. When she sequenced DNA in space for the first time, she opened the door to a new era in space biology.
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Space X is reviewing every frame of video to find out exactly why its Falcon 9 rocket exploded shortly after liftoff Sunday. Search crews are also on the hunt for fallen debris.
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SpaceX will try again on Friday to land a booster rocket on a barge in the Atlantic Ocean.