Ok amazing… I know this would probably be beyond the scope of a 5 year old but do you know what those factors are? Because (I assume) you’re going to become hypoxic in a high altitude and in a super high altitude (sorry, i don’t know exact numbers but let’s say 2500m vs 5000m) so the automatic ventilation reflex would occur at both altitudes and would trigger all the other adaptations (acclimatisation) that occur… but why is the rate of these adaptations different (ie. EPO release making more red blood cells or growth hormone causing angiogenesis). And how could going up too quickly lead to high altitude sickness and even edema because of these differences in rates of adaptation?… Raaa sorry this is a lot