Tools Were Made 30,000 Years Back!!

Recent studies have found out that humans have made tools at the Tibetan plateau a log time back i.e. around 30,000 years back. Paleontologists have already come up with the only remains of the ancient hominin species in 2008 at Siberian cave. To know more about when and where the Denisovans mate with Homo sapiens did, and what type of migration routes did their mixed offspring followed, scientists worked lot.
In this study researchers from Beijing’s Institute of Vertebrate Paleontology and Paleoanthropology along with their colleagues excavated an archaeological site which was almost 4,600 meters up on the Tibetan plateau. The study unearthed more than 3,000 stone tool fragments in which most of them were of double-sided blades and were found by the scattering of three layers of sediment.
Paleontologists by using a technique known as optically stimulated luminescence, which basically measures the photons emitted by minerals, calculated the correct age of the tools and concluded that they range between 30,000 and 40,000 years ago. This furthermore suggested that the artifacts which are found are far more ancient and older than what it has been found earlier.
An anthropologist at the University of Arizona, John Olsen said that he and his team did not initially expect that they could find archaeological evidence of humans by challenging the high and harsh environment.
In another article which got published alongside the study, a geochronologist Jia-Fu Zhang from Peking University and an archaeologist Robin Dennell, University of Exeter has noted that the site of Nwya Devu, was near a ridge of black slate which would have provided the tools with the appropriate raw materials. The study also casted lights on facts that about 40,000 years back its known that no human remains were found at Nwya Devu, however, the remains have been found in a cave in northern China, which suggests that the people who made the tools were not Denisovans or Neanderthals, or any another relative, but they belonged to our species.
The authors of the paper furthermore suggested a different possibility which cites the similarity of the Nwya Devu tools compared to others found in Siberia.

By: Prerana Sharma
Content: https://www.the-scientist.com/notebook/humans-made-tools-atop-the-tibetan-plateau-more-than-30-000-years-ago-65512