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James Leidner spent three nights in a high-tech sleeping bag that unloads pressure in the brain by suctioning fluids into the lower body. NASA hopes the sack can be used by astronauts in space to alleviate the vision problems they commonly endure during longer missions.

High-tech space sleeping bag could stop vision problems in astronauts

9 December 2021

Long spells in microgravity can alter eyeball shape, but a sleeping bag that applies suction to the lower body could prevent such problems

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