From feelings of weightlessness to literally out-of-this-world views, the life of an astronaut is something to be envied—most of the time. Unfortunately, space is also really bad for the human body. According to a NASA study, it's bad for the human heart, too: time in space makes astronauts' hearts more spherical.
Less Gravity Makes For Lazier Hearts
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Written by Haley Otman April 21, 2017
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