 Tibetans' Ability to Live at ...Tibetans' Ability to Live at 13,000 Feet—and Other Modern-Day Evolutionary Tricks - With an average elevation of 13,000 feet above sea level, Tibet has some of the thinnest air on the planet, with 40 percent less oxygen than is found at sea level. When foreigners travel there, after suffering through mountain sickness, their bodies adapt by producing more of the oxygen-carrying pigment hemoglobin, and when they return to sea level they can make more of every breath. But ... |  Air Pollution Can Have ...A Canadian analysis found that where a person lived was more significant of a factor in gene expression than their heritage. |  Black Death Altered European GenesThe Black Death of the 14th century may be written into the DNA of survivors' descendants, new research finds. |
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