MSNBC American Voices With Alicia Menendez September 18, 2021 23:51:00
Your eyeballs may feel like they are bulging a little bit. but over a couple days, you lose that extra water. and -- and so, you feel really comfortable in space. then when you come back down, the reverse happens, right? when you come back down and you feel gravity again, all that -- that fluid that was in your head and your up torso goes back down into your legs and your lower torso. and so, if you are up there for longer periods of time, your blood pressure doesn't really -- the vascular system doesn't really push the -- the fluids back up into your brain so that your brain, you know, gets e...