I'd say because it's harder to breathe due to the lower partial pressure of oxygen.Good video but he didn’t explain why it feels heavier. My guess is a reduced evaporation rate with humid air, even though it’s less dense.
Could be. Except that you don’t feel the heaviness with just pressure changes, at least I never have. Either way I could do without it.I'd say because it's harder to breathe due to the lower partial pressure of oxygen.
My plane should fly really fast under water.