We have many gaps in our history that help us constantly learn new things about our ancestors. Everything that moves past 2000 years, our information is incomplete at best, and for this reason finding like this has a significant impact on the way we perceive our ancestors.
Up until now we, according to the evidence that we had, humans had colonized the Tibetan Plateau around 8,000 years ago, but recent findings have shown that we did more than 40,000 years ago.
Xiaoling Zhang, who is an archaeologist of the Chinese Academy of Science in Beijing and also her colleagues have managed to excavate a site on the Tibetan Plateau that is called Nwya Devu. The three sediment layers have contained 3,683 stone artifacts that were made from high-quality and local rock, according to the report published in Science on November 30.
Based on the evidence that they have managed to gather from each of the soil layers, humans have lived there from around 40,0000 years ago to 30,0000, and then from 25,000 years ago to 18,000 years ago, and the last period is from 13,000 years ago to 4,000 years ago.
According to Xiaoling Zhang, the site that they have found has been probably used by the people that lived there as a workshop, since they found a large variety of tools made from stone, like long and rectangular blades that were probably used for scraping or cutting. Due to ecological conditions, these people probably lived there seasonally and hunted yaks and gazelles.