An international group of scientists found in Mongolia stone tools, which indicate that people traveled in the Eurasian steppes approximately 10 thousand years earlier than previously thought. About it reported in a press release on Phys.org.
The age of the artifacts found during the excavations from 2011 to 2016 along the river Tolbor, up to 45 thousand years. We found only several thousand stone tools, and 826 of them were associated with the ancient sites of people. Tools with long and correct blades similar to those found in other archaeological sites in Siberia and in the North-West of China. This indicates that large-scale resettlement of people in the region.
Despite the fact that no human remains have not been found, scientists believe that tools were created by modern people and not Neanderthals or denisovans, who are not in possession of the appropriate manufacturing technique. The researchers also determined the climatic conditions for organic remains. The region has become wetter and warmer, making it more favorable for grazing.
The age of the tools corresponds approximately to the time of contact between modern humans and denisovans type. It is believed that the latter gave Homo sapiens genes that make the organism more resistant to hypoxia and allow to settle in areas with relatively sparse air, for example, on the Tibetan plateau.
The denisovans (Homo altaensis) — an extinct species or subspecies of ancient people, known for the fossils that were found in Denisova cave in the Altai. Considered a sister group in relation to Neanderthals. Recently there has been evidence that the denisovans and Neanderthals could interbreed among themselves and to acquire the joint offspring.
It is known that people of modern anatomy left Africa at least 100 thousand years ago and spread across Eurasia, sometimes interbred with other species of the genus Homo — Neanderthals and the Denisovsky person. This has led to the introgression of DNA from extinct forms of humans in the genome of Homo sapiens.
Video, photo All from Russia.