After discovering Denisovan DNA in the genomes of residents now living in Tibet,scientists bear suggested that these human ancestors of ours were happily living in Tibet 40000 years before contemporary humans arrived on the scene.
According to the Daily Mail, scientists now believe that Denisovans were living on the Tibetan Plateau tens of thousands of years before they were first thought to arrive in this area. It has also been suggested that it may actually be through the help of Denisovan DNA that contemporary residents of Tibet bear been able to adapt so well to life at perilously high altitudes, or with the plateau of Tibet 12000 feet above sea level.
Research conducted in the past originally tried to demonstrate that there were no humans in Tibet until around 3600 years ago,but now current work conducted at the site of Nwya Devu disputes this, as Dr. John Olsen from the University of Arizona at Tucson recently explained.
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Source: inquisitr.com