At present, human family species that are related to contemporary humans can be confirmed: modern humans, Neanderthal , Denisovan . In modern humans, about 2% of genes come from the destruction of Neanderthals. It is generally recognized by the academic community that it is not uncommon for early modern people to have sex with Neanderthals. In 2004, the Flores were discovered in Indonesian . The academic community tended to be that this is a human animal that is paralleled with , Neanderthals, and Denisovans on biological classification . Related research is being carried out.
Neanderthal images are spread all over the world.
4.5 billion years ago, the earth was born. 3.9 billion years ago, organic matter was produced. 700 million years ago, the simplest animal similar to sponge appeared. Mammals appeared 300 million years ago. 25 million years ago, the common ancestor of primate appeared. 2.8 million years ago, the human sciences appeared. 150,000 years ago, a woman named Eve by the biology community appeared in Africa. Today's life sciences use genetic analysis technology to prove that Eve is the grandmother of all human beings. Even scholars who advocate that humans are multi-original theory admit that all modern people today have close genetic relationships with Eve.
The only species of human family living on Earth today are modern people. The scientific research that constantly explores has proven that in the process of tracing the origin of human beings, it has proved that there are multiple human species that have coexisted, intersected and interacted with modern people. Related research is still underway and new discoveries are constantly being made. Xiahe Denisovans, referred to as Xiahe people, are a relatively mature discovery.
Altai Denisova Cave
2008, in Denisova Cave, Denisova Cave in the Altai Denisova Cave in the southern part of Siberia , a group of ancient human fossils were found, including a phalanx and a tooth, and some ornaments. The human body and environmental decorations discovered in batches are enough to prove that this ancient human being has entered the stage of wisdom.
DNA detection proves that the fossil belongs to a woman aged 5 to 7 years old. She lived 130,000 to 50,000 years ago and walked upright, but her body structure is different from that of the other two humans of the same period, early modern humans and Neanderthals. After long-term multidisciplinary research, it was confirmed that this is an independent human species named Denisovan. After more than ten years, the fossils found in the Denisova Cave can identify three Denisova people, one teenager female and two adult males through DNA.
Xiahe County Baishiya Cave
In the 1980s, a human mandibular fossil was found in Baishiya Cave, Xiahe County, Gansu Province, China. Chinese scientists have been studying this precious fossil carefully for decades and have continuously achieved new research results. On May 2, 2019, a team led by scholars from Qinghai-Tibet Plateau Research Institute of Chinese Academy of Sciences, , Lanzhou University and MaxPu Institute of Evolutionary Anthropology in Germany published research results in Nature. This ancient human mandibular fossil is 160,000 years old. It is the first Denisovan fossil discovered outside the Denisovan Cave and is also the earliest human activity remains of Qinghai-Tibet Plateau .
Xiahe people's mandibular fossil
By analyzing paleoproteins, Denisovans and Neanderthals are two branches derived from the same ancestor. The modern Papua New Guinea living in the southwestern Pacific Ocean has about 5% of the genes of the Melanesians. It is speculated that the ancestors of the Melanesians met and intermarried with the Denisovans in southeast Asia. Later, the ancestors of the Melanesians came to Papua New Guinea.
An international joint scientific team, through research on the EPAS1 gene, showed that this gene fragment is unique to Tibetan . After cross-comparison, it was confirmed that the gene was derived from Denisovans. This research result, combined with Xiahe people's fossil research, explains how early humans adapt to high-altitude environments.
So far, the Denisovans have only revealed their true appearances on the Qinghai-Tibet Plateau and the Altai Mountains. Their genes have penetrated into modern plateau nations and Pacific islands nations. It is speculated that they have spread widely in Asia and have genetic contributions to modern Asians, and their impact on individual ethnic groups has exceeded that of Neanderthals.
(full text)
