Dizzying heights: Prehistoric farming on the 'roof of the world'

Archaeological findings pose questions about genetic resistance in humans to altitude sickness and genetic response in crop plants to flowering times and ultraviolet radiation tolerance. Archaeological discoveries from the 'roof of the world' on the Tibetan Plateau indicate that from 3,600 years ago, crop growing and the raising of livestock was taking place year-round at hitherto unprecedented altitudes.

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