The paper, "Comparing integrative ventilatory and renal acid-base acclimatization in lowlanders and Tibetan highlanders during ascent to 4,300 m," describes findings from an international high ...

In addition, for reasons not entirely understood, high altitude and lower air pressure causes fluid to leak from the capillaries which can cause fluid build-up in both the lungs and the brain.

Ordinarily, trekking into high alpine zones requires days or even weeks of altitude acclimatization to help you adjust to the fewer oxygen particles you'll be taking in each breath. Weird things ...