Everest is a point of reference showing how shallow the ocean of air we live in really is. 29,032 feet, 5 1/2 miles and most of us would be suffering at just half that.

5 1/2 miles is a short commute horizontally, do that vertically and you’re dead.

"...if the gentlemen of Virginia shall send us a dozen of their sons, we would take great care in their education, instruct them in all we know, and make men of them." Canasatego 1744