Are humans getting lighter in skin color the more they evolve? Is there a correlation between skin color and intelligence?

Yes, if you think about the human form, you automatically associate the most familiar tri-color division - black, white and yellow - with an illusion of transition. It's an illusion because both the division and the racist "whiter the higher, whiter" logic behind it are complete pseudo-science.

▲In fact ...... East Asians prefer white skin

Human genetic diversity is low

In fact, molecular biology has been a real savior, and after it came along we discovered that humans evolved along a completely different path than most people thought and obsessed about, destroying all racist doctrines. The first amazing discovery was that all humans originated from Homo sapiens in Africa, rather than evolving separately from the native genus Homo. The second shocking discovery was that the genetic diversity of human beings is astonishingly low, with 7 billion humans having less genetic diversity than even a single family of chimpanzees in the jungles of the Congo.

▲ Look closely and you will see that Africans vary greatly in appearance

The reason why the genetic diversity is so low is because the history of human beings is too short, from the current research results, homo sapiens has appeared so far not more than 350,000 years, compared with other species can be tens of millions of years of history, like a newborn baby (pesky mosquitoes appeared 170 million years ago, the age of the dinosaurs in amber have their figures). All the fossilized apes found in China, including Homo erectus, to which the Peking and Yuanmou Apes belong, also lived on this continent for more than a million years, making them the longest-surviving human genus ever.

▲Homo erectus restoration

And another reason why the genetic diversity of Homo sapiens is so low is because the Homo sapiens that made it out of Africa were a very small group of about 10,000 people. Although Africa's population is now only 17% of the total global population, the other 5.8 billion humans are descended from that 10,000, so this produces a very counter-intuitive result - the other 5 continents don't have as much human genetic diversity as a single Africa, and Europeans and East Asians, in particular, have such small genetic gaps that they're almost negligible .

▲Approximate migration routes

Whitening on two lines

Homo sapiens broke out of Africa 70,000 years ago, and after conquering the Neanderthals began to spread toward Asia and Europe, and one of them went northward into Europe, and one of them changed its course halfway northward, and crossed from the snowy plains of Siberia, and came across Mongolia to the east coast of Asia, and out of this group continued to spread, and a part of it passed through the frozen Bering Strait into the Americas, and that is to say, the aboriginal inhabitants of the Americas --Indians and Mayans, Aztecs, and Incas.

▲ Indians look quite similar to us.

The branch of Homo sapiens that stayed in East Asia was the Han Chinese, the main ethnic group in China, and the Japanese and Korean races, which used to be called "Mongoloids", but now we prefer to call them East Asians.

Sunlight on the skin brings vitamin D, which is important for bone development, but too much sunlight can damage the skin, so African skin is rich in melanin to absorb ultraviolet rays. But at high latitudes where sunlight is already scarce and thick clothing gets in the way, it is difficult to get enough sunlight. So for normal growth and development, both Europeans and East Asians evolved ways to make their skin lighter.

Programmatically, however, the two are not the same. The two genes that have the greatest impact on the pale skin color of Europeans are SLC24A5 and SLC45A2. a mutation in the SLC24A5 gene, A111T, disrupts the synthesis of the NCKX5 protein, and a mutation in SLC45A2 disrupts the synthesis of the MATP protein, which is closely related to melanin synthesis, which means that the European mutation has caused melanin to be synthesized. synthesis process is disrupted by the European mutation.

▲Micrographs of melanosomes

However, East Asians are completely different. The gene that dominates our skin color is OCA2, which is involved in the transport of tyrosine (the raw material for melanin synthesis) in melanocytes and regulates the pH of melanosomes, thus regulating the maturity of melanosomes, and the more mature the melanosomes are, the darker the skin becomes, so melanin is a regulated mechanism in East Asians.

▲From left to right are Africans, East Asians, and Europeans.

Thus, without receiving light at all, our skin color is not particularly different from that of white people, but the European skin color is less likely to darken under sun exposure, because for them synthesizing melanin is really difficult. Wheat is considered the healthiest color in Western society, but even that requires long hours of sunbathing. But we East Asians have the little knob of our genes easily turned to the max under strong sunlight, and so we become darker.

▲We are more likely to get tan lines

Intelligence is mainly influenced by the level of civilization

As you can see, there is no evolutionary relationship between our skin color and the skin color of Europeans, our ancestors evolved light skin through different paths to adapt to the environment. The so-called "evolutionary ladder" based on skin color is even more of a joke, but of course there is already a consensus among us, after all, after the country is rich and powerful, few people will think that Chinese people are inferior to white people.

▲The Yellow Peril cartoon that vilified the Chinese a century ago

But there are not a few people in China today who ridicule African people on the basis of their skin color and, by extension, their intelligence, which is actually wrong for two main reasons:

First of all intelligence is completely trainable and education significantly changes intelligence test scores.

Secondly, there are many factors affecting the development of civilization in human societies, the more developed the civilization is, the more obvious the so-called "high intelligence" manifests itself, and the speed of civilization's development is greatly affected by geography and the environment.

▲The Pyramid of Khufu was built 2300 years after the establishment of the Great Qin, 2241 years ago.

For example, we cannot assume that the ancient Egyptians were twice as smart as we are just because the ancient Egyptian civilization appeared twice as long as the Chinese civilization (the time between the birth of ancient Egypt and the birth of the Shang is even longer than the time between the birth of the Shang and the present day), and we cannot assume that we are twice as smart as the West just because the Chinese civilization is the only ancient civilization in the world that has lasted until today, both of which are not desirable.

I'm Sheikh Know Fish, a science writer who loves humanity, welcome to follow!

If you have enough opportunities to meet people with various skin tones and make a "skin color spectrum" for their skin tones, you will find that this "skin color spectrum" is like an interval of the spectrum, which is not only black, yellow and white, but also has a series of excessive types in the middle, meaning that skin tones are gradually getting lighter and lighter. On the basis of the three main colors, there will be a series of excessive types in the middle, that is to say, the skin color is gradually becoming lighter.

Currently the world's human beings, if based on the difference in skin color, can be divided into four major categories: yellow, white, black and brown. The reason why the human body skin color will appear so big differences, mainly by the amount of melanin content in the skin is determined by the amount of melanin in the skin, more melanin in the skin is black, a little less brown, medium content of yellow, very little white.

So if you follow up, what causes the human skin to have more or less melanin? It starts with our human ancestors. In ancient times, our human ancestors, the great apes, were covered in hair, with no difference in skin color, and the hair played an important role in maintaining body temperature and reducing damage from ultraviolet rays. In the evolutionary process of adapting to nature, when the ancient apes gradually learned to walk upright and left the forest, had to rely on long-distance running to capture prey, the body's requirement for rapid heat dissipation is becoming stronger and stronger, covering the whole body of the hair gradually don't fine sweat hair instead.

In this case, the skin is directly exposed to the sun, the skin is easily damaged by ultraviolet rays, and those human ancestors with more melanin in their skin would have had a great survival advantage. Thus in Africa, where humans originated, the black race slowly evolved. As human ancestors migrated from Africa to other parts of the world many times, the light intensity and temperature have changed a lot with Africa, and different from each other, in order to reduce the ultraviolet damage and vitamin production through light to achieve a balance between the two contradictory relationships, and gradually evolved different skin color of the human race, in the middle and low latitudes is the brown people, in high latitudes is the white people, and in the middle is the yellow people.

Since the distribution of human beings is essentially continuous in latitude, the amount of melanin within the skin has changed progressively during the evolutionary process, with the aim of adapting to different intensities of solar radiation, and the outward manifestation of this is the gradual change in skin color, which can show great variation in the same race.

1. blacks are the same type as whites, both have deep eye sockets, big noses, curly hair, and can't squat

2. The yellow race is a separate one: black eyes, black hair, yellow skin.

3. The yellow race has the highest IQ in the world.

4. blacks are the ancestors of whites, that's the truth and it won't change in 10,000 years.

Human races and skin colors are derived from different natural origins of mankind. The origin of mankind belongs to many places rather than one place, and not to the same originator. Only the yellow race is the whole earth and the whole universe originated the first first person, born for the "gengchen" year, "the heir of the dragon" and is the first ancestor of mankind, the rest for the succession of different places originated from different races of mankind.

On earth there are yellow people, black people, white people, brown people belong to the born mutant color people, in the whole universe there are red people, blue people, born mutant gray people, and is that the whole universe has positive color, red, blue, black, white, yellow, five color people, and mutant color people. Different skin color human race can not evolve into another skin color human race, can only be born through different two skin color human race hybrid mutation with the father or mother skin color people, and their parents with the same part of the appearance of people. The race and origin of the human race will naturally be clarified after the rendezvous with the aliens.

Humans identify ethnicity by skin color, not by DNA.

Skin color is closely related to the geographic environment, the white race originated from Northern Europe, where the ice and snow, if the long black is easy to be found by predators, if not grow tall and strong a little easy to freeze to death. Black people live in the African plains with strong ultraviolet radiation, too white skin is easy to sun off, nostrils are too small for heat dissipation, if the legs are not long and not good at running easy to be captured by lions. Yellow people mainly live in the hills and basins, plains, mountains and forests are more temperate zone, long more moderate, skin color is closer to the yellow earth, not too tall, but also easy to hide in the jungle, flexible and agile, more adept at collecting fruits and farming!

Skin color is directly proportional to latitude, whites living in Africa are much darker than yellows

Black to yellow to white.

The color of my skin is fading.

And between people of different skin colors

Mainly in the course of human evolution

Due to genetic mutation

Then under the influence of the external environment

Regional variations have emerged

They're not really related.

Differences in skin color between races are not determined by differences in the number of melanocytes in the epidermis; in fact, the number is essentially the same! Rather, they are determined by differences in the number, size, and distribution pattern of melanin vesicles or pigment granules within the keratin-forming cells. Dark-skinned individuals have more melanosomes, which are larger and distributed individually, whereas light-skinned individuals have fewer and smaller melanin granules, which are encapsulated in membrane-bound complexes!

The skin color of human beings has been produced by natural selection and adaptation in their respective natural environments.

No matter what color, the quality must be forced to improve, strong must be forced to improve the comprehensive quality of the people (improve the quality of conscience to improve the quality of law to improve the quality of integrity and law-abiding quality to improve the quality of the contract to improve the quality of science to improve the quality of safety to improve the quality of food to improve the quality of the fire quality to improve the quality of the ethical quality to improve the quality of the responsibility to improve the quality of psychology to improve the quality of the pharmacy to improve the quality of the eugenics to improve the quality of the low carbon quality to improve the quality of the beliefs to improve the quality of the Buddha Improve the quality of philosophy Improve the quality of music Improve the quality of innovation and entrepreneurship Improve the quality of pattern Improve the quality of dedication Improve the quality of level Improve the quality of the whole situation Improve the quality of gratitude Improve the quality of soul Improve the quality of language Improve the quality of politeness Improve the quality of love and thankfulness Improve the quality of IQ and EQ Improve the quality of military Improve the quality of environmental protection Improve the quality of genes Improve the quality of marriage Improve the quality of hygiene Improve the quality of financial Improve the quality of financial management Improve the blood quality to improve the quality of knowledge and self-knowledge to improve the quality of reverence to improve the quality of aesthetics to improve the quality of math ............ and so on. (Obtaining positive smell positive hearing positive taste positive vision positive mind consciousness obtaining supreme positive consciousness, correctly treating society correctly treating life correctly treating life correctly treating food correctly treating the universe correctly treating others correctly treating oneself.!!!)