Over thousands of years, human populations residing in extreme environments have developed distinct biological traits to cope with these continuous stressors.
At high altitudes, the atmospheric pressure decreases, meaning there are fewer oxygen molecules available in any given breath. This forces the human cardiorespiratory system to work significantly harder.
In high-altitude regions like the Tibetan Plateau and the Andean mountains, indigenous populations have developed remarkable evolutionary solutions to hypoxia. Tibetans, for example, possess a genetic variant of the EPAS1 gene—often referred to as the "super-athlete gene"—which allows them to utilize oxygen highly efficiently without overproducing red blood cells, a reaction that would otherwise thicken the blood and cause cardiovascular strain. Andeans have adapted differently, often developing larger lung capacities and higher hemoglobin concentrations to maximize the capture and delivery of scarce oxygen.
Over thousands of years, human populations residing in extreme environments have developed distinct biological traits to cope with these continuous stressors.
At high altitudes, the atmospheric pressure decreases, meaning there are fewer oxygen molecules available in any given breath. This forces the human cardiorespiratory system to work significantly harder.
In high-altitude regions like the Tibetan Plateau and the Andean mountains, indigenous populations have developed remarkable evolutionary solutions to hypoxia. Tibetans, for example, possess a genetic variant of the EPAS1 gene—often referred to as the "super-athlete gene"—which allows them to utilize oxygen highly efficiently without overproducing red blood cells, a reaction that would otherwise thicken the blood and cause cardiovascular strain. Andeans have adapted differently, often developing larger lung capacities and higher hemoglobin concentrations to maximize the capture and delivery of scarce oxygen.
