Originally Posted By: + @ti2d

I like this subject.


Me, too. Think about this one: if you are at 40,000 ft and breathing 100% O2 at ambient pressure you will die.

Must have pressure. My use of "barotrauma" was my exaggeration as no one can climb or descend on two feet that fast. A better word for the benefit of pressure is "oxygen cascade" Look up how O2 gets to the mitochondria.

Why die at 40,000 ? Jet pilots wear pressurized masks. Otherwise their entire cabin would need to be pressurized. O2 alone will not work

Resting after a short hike in Mammoth. Acclimatizing