This article was more interesting than I expected. Notably it proposes a mechanism that I hadn't heard suggested before: > Renshaw believes that altitude has

This article was more interesting than I expected. Notably it proposes a mechanism that I hadn't heard suggested before: > Renshaw believes that altitude has an impact on our brain chemistry, specifically that it changes the levels of serotonin and dopamine, two key chemicals in the brain that help regulate our feelings of happiness.