author: no milk tree, Head Figure from: Vision China
Recently, Ding Zhen, from Litang County, Ganzi Prefecture, Sichuan Province, got fired.
The pictures below that are not marked are all from “The World of Ding Zhen”
Recently, Ding Zhen, a Tibetan guy in Litang County, Ganzi Prefecture, Sichuan, became popular on the Internet because of a video accidentally… Some people say that Ding Zhen’s popularity is due to his superb looks and handsome appearance, and some say it is. Was moved by the simplicity and innocence of Ding Zhen. In fact, these just gave him the potential of Internet celebrities. What really makes him a “top traffic” is his love for his hometown and life. ……
——@人民日报
People began to analyze the reasons for Ding Zhen’s popularity from various angles: the “star-making” trajectory in the Internet age, the propaganda of tourism ambassadors, and people’s yearning for truth, goodness and beauty… Among them, the focus of most attention is naturally that he is different from The appearance of the plain Han nationality: dark skin, tall nose, and clear eyes.
These were decided under the control of natural selection 20,000 years ago.
The mountaineering action ten thousand years ago
Twenty thousand years ago, a group of primitive people using stone tools came to the foot of the “Roof of the World”-the Qinghai-Tibet Plateau. It may be due to ethnic struggles from outside, or lack of food, or it may be the adventure spirit that exists in the human bones. They started a mountaineering operation.
They want to climb this plateau with an average altitude of more than 3000 meters, looking for new onesHabitat.
The high altitude, low pressure, low oxygen, cold and dry environment, and strong ultraviolet rays on the Qinghai-Tibet Plateau have brought a lot of trouble to this group of primitive people.——Many of the ethnic groups are strong and tall The strong men fell one after another, and the remaining people continued to move forward slowly amid hesitation and hesitation.
We don’t know how long this long mountaineering activity has been going on, but what we can know is that all of this is actually controlled by natural selection, which will eventually reward this group of human beings for their hardship.
It wasn’t until ten thousand years later that Darwin’s “Origin of Species” was considered to reveal the truth | Source: Wikipedia
As the number of people who cannot adapt to the plateau gradually decreases, thousands of years later, the remaining ethnic groups find that they don’t seem to have too serious altitude sickness, and they gradually settle on this harsh plateau. What they don’t know is that natural selection has manipulated the genetically altered code in them, leaving it to be discovered by later generations.
Of course, the above is a hypothesis based on the known evolutionary theory and evidence from genetics and archaeology. In reality, how the Tibetans climbed the plateau and adapted to the plateau environment is still under study, but there are already Quite a few results.
Ten thousand years later, in the 20th century, when the people of the Plains tried to climb Mount Everest with the adventurous spirit of ancient humans thousands of years ago, they discovered that the Tibetan partners around them had superb plateau adaptability-the explorer was due to altitude sickness When the suffering is unspeakable, Tibetans can handle it with ease.
Why can Tibetans adapt to the plateau environment so much?
The uniqueness of Tibetans does not stopAppearance
Let’s come back and take a look at Ding Zhen. Biologically, we can clearly see some differences between him and the plain Han people:
Dark skin and larger nasal cavity;
Slim body;
This is how Tibetans adapt to the plateau:
Some studies have found that Tibetans have larger nasal cavities and thicker faces than plain people. This may be an adaptation of the Tibetan upper respiratory tract to low oxygen concentration, so that Tibetans can increase their ability to take in oxygen and have different facial features This structure may also be closely related to cold and low oxygen concentration;
Dark skin can help Tibetans resist the strong ultraviolet rays on the plateau. Studies have shown that there are unique mutations in genes related to skin pigmentation in Tibetans, which makes Tibetans have more melanin and can absorb strong ultraviolet rays;
Besides the possible living conditions, the lighter weight and shorter stature are also due to the limitation of the plateau environment, which has brought them genetic changes. Studies have found that Tibetan newborns and children are heavier than their plain counterparts