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https://ondemand.npr.org/anon.npr-mp3/npr/atc/2019/10/20191017_atc_stuck_on_mars.mp3?orgId=1&topicId=1026&aggIds=156490415&d=134&p=2&story=771095172&ft=nprml&f=1003,1004,1007,1013,1014,1015,1017,1024,1025,1026,1059,1122,1150
A sophisticated thermometer on NASA's Mars InSight lander has been stuck for months. It was supposed to drive down 16 feet into the Martian soil but stopped. So scientists used a novel way to free it.
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