This is amazing: natural selection over many generations have resulted in Tibetans with unique DNA that allows them to breathe at high altitudes!
University of Utah researchers found 10 genes which help Tibetans thrive at heights where others get sick.
Two of the genes are linked to haemoglobin - the substance in blood that transports oxygen round the body.
Doctors say the research, published in Science, could lead to treatments for severe forms of altitude sickness and other illnesses.
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