sciencehabit writes A "superathlete" gene that helps Sherpas and other Tibetans breathe easy at high altitudes was inherited from an ancient species of human. That's the conclusion of a new study, which finds that the gene variant came from people known as Denisovans, who went extinct soon after they mated with the ancestors of Europeans and Asians about 40,000 years ago. This is the first time a version of a gene acquired from interbreeding with another type of human has been shown to help modern humans adapt to their environment.
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