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How time in space impacts astronauts' brain
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How time in space impacts astronauts' brain
02:53
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A new study examines how time in space impacts astronauts’ brains, possibly having big implications for the future of space flight. Scientists discovered that parts of the brain moved up to 2mm in the skull after periods spent in a zero gravity environment. NBC News’ Tom Costello reports on the new findings as NASA is due to bring home its astronauts early due to an undisclosed medical emergency. Jan. 14, 2026
