[r00fus]

Where do you expect to find humans at significantly high elevations like say, the peak of Mt Logan, BC, Canada (which is ~6km or 19k ft above sea level, where water does indeed boil at 80 deg C)?

I certainly wouldn't call that normal. Noone lives at those altitudes.

[beambot]

It's normal when you work in a physics or chemistry lab using vacuum chambers.