I was thinking about the Nutty Putty Cave incident and how one of the things that contributed to the urgent need for rescue was that the diver was upside down. He had hours.
Meanwhile, people have spend months, years in space. If we’re so sensitive to gravity, how can we deal so well when we remove it completely?
In: Planetary Science
Being upside down and being in a 0-g environment aren’t the same thing. In a 0-g environment your blood isn’t pooling in your head, but if you watch videos of astronauts on ISS you will notice their heads are puffier since their hearts which are used to pumping blood to their heads under 1 g now have a much easier time doing it under 0 g’s.
https://airandspace.si.edu/stories/editorial/astronaut-lingo-puffy-head-bird-legs
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