Ethiopians and Tibetans thrive in thin air using similar physiology, but different genes

Scientists have pinpointed genetic changes that allow some Ethiopians to live more than a mile above sea level without getting altitude sickness. The genes differ from those reported previously for high-altitude Tibetans, even though both groups cope with low-oxygen in similar physiological ways. The results may help scientists understand why some people are more vulnerable to low oxygen caused by factors other than altitude -- such as asthma or heart problems -- and point to new treatments.

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