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Barley helped ancient humans inhabit the 'Roof of the World'
Barley helped ancient humans inhabit the 'Roof of the World'

How did human settlements manage to reach high altitudes in the Tibetan Plateau, a region known as the “Roof of the World”? An international team of researchers has a simple answer: barley. The findings, published in the journal Science, reveal a key factor that helped human settlements overcome such harsh, unforgiving environments. Archaeologists have found traces of intermittent human presence high on the Tibetan Plateau from 20,000 years ago, including worked stone, handprints and footprints some 4,200 meters (or 2.6 miles) above sea level. In slightly more recent history, from 14,600 to 7,500 years ago, signs of encampments have been found higher than 3,000 meters (1.9...

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