Genetic secrets that allow Tibetans to thrive in thin air discovered

Scientists have identified a gene that enables Tibetans to thrive at altitudes where others get sick. A previous study published May 13 in Science reported that Tibetans are genetically adapted to high altitude. Now, a second study by a different team pinpoints a particular site within the human genome -- a genetic variant linked to hemoglobin -- that helps explain how Tibetans cope with low-oxygen conditions.

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