New astronauts have changes in their brains after their first long-duration mission

Astronauts who go on their first long-duration space mission have differences in their brains compared with the brains of more experienced astronauts and those of people who have never been to space — specifically, growth in the spaces in the brain where cerebrospinal fluid flows, a new study finds.

Though scientists have known that being in space alters and potentially damages the brain, the study is one of the first to address a specific aspect of brain health in space using a comparative method and a relatively large group of astronauts. 

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