Originally Posted by KC Fish
Absolutely, it's because we are used to it. Used to the atmospheric pressure that bears down on us at all times. We like to think that we'd be an equally proficient species in space. But the truth is that our human bodies don't do worth a shit in space without the Earthly physics affecting our bodies at all times. It's an underrepresented fact of space travel. The human body just goes to shit outside of Earth's atmosphere.
Wow, that is fascinating. You should include links, btw.