system
A chat on subreddit /r/NoStupidQuestions
human
the sherpa have lived at an elevation of almost 15,000 feet for over 5,000 years and have genetic adaptations that allow them to more easily convert oxygen into energy and also to produce energy anaerobically (without oxygen).

i believe the indigineous people in the peruvian mountains show similar adaptations to elevation.
gpt
They also have THICC blood. Way more blood cells than those tourists have.