Does human skin color violate the theory of evolution?

Black can reduce the damage of ultraviolet rays, so white people have more cancer than black people. (The melanin in the black ** can absorb excessive ultraviolet rays in the hot areas of Africa, which is a kind of protection for **) This sentence is wrong, not absorption but reflection. The swarthy is not black, it has reflective oil on it, and a thick black hair protects the scalp.

Blacks are better suited to living in the tropics, and in general, the color of human skin does not contradict the theory of evolution, but rather supports it.

In the lowest layer of the human body, there is a kind of melanin granules, called melaninosomes. There is also a type of cell called melanocytes, which produce melanin when exposed to ultraviolet light. People living in the tropics have been exposed to ultraviolet rays for a long time, so they are black, which is a must-have for people in the tropics**.

We live on Earth.

And alive and well.

We conform to the theory of evolution.

Our brains are a product of evolution, and of course, every part of our bodies conforms to the theory of evolution.

Black is sunscreen, which can avoid the damage of ultraviolet rays to people, so the sun is sufficient, and it becomes dark.

As for the problem of warmth, it is easy to solve, humans have fire, and they can wear clothes and keep warm with animal fur.

The melanin in the black ** can absorb excessive ultraviolet rays in the hot areas of Africa, which is a kind of protection for the **, and for a long time, such characteristics can be inherited.

People in the cold regions near the northern poles, in order to avoid the cold for a long time, wear more clothes and do not need to have too much melanin in **, which is black people.

In general, human skin color does not contradict the theory of evolution, but rather supports it.

01 Scientists have found that there is no difference between human ancestors at the beginning, and their skin color is basically the same. It was only later that people moved to different regions and gradually developed differences in skin color in order to adapt to the outside world or environment.

The color depends on a chemical called melanin. The more melanin you have, the darker your skin tone. A light-skinned person who stays in the sun for a long time will produce a large amount of melanin, in other words, the person is sunburned.

People with albinism do not have melanin in them, and their color is usually pink, which is actually the color of blood through colorless. Usually, the hair of people with albinism is also white. Therefore, people with albinism have gray hair since childhood.

Melanin is the umbrella of the best. The ultraviolet rays in the sundry mountain can cause sunburn** and even lead to**cancer, melanin is like sunscreen, which can absorb the ultraviolet rays in the sun and protect ** from further damage. The more melanin in you, the darker your skin tone and the better your ability to absorb UV rays.

The color of human beings is the result of adaptation to nature in the process of evolution. Africans living in the equatorial region are often exposed to strong sunlight and produce a large amount of melanin in their bodies, so Africans are black. In the alpine land, there is less light, so ** is white.

Yellow people generally live in temperate regions, the intensity of sunlight is in the middle, and melanin is also in between, so the color of ** is also between the two people.

In summary, there was no difference in the ancestors of human beings at the beginning, and the skin color was basically the same. It was only later that people moved to different regions and gradually developed differences in skin color in order to adapt to the outside environment.

In the distant future, there may be such a possibility, the world will truly become a "global village", where all residents in all regions can choose to live, marry, and have children in all regions of the world, and finally all genes will merge and their skin color will gradually be unified.

One of the greatest miracles of human evolution is that reproductive isolation has not occurred since far back from primitive times to modern times. The ancestors of modern humans appeared less than 100,000 years ago, and migrated to the American continent along the ice shelves about 10,000 years ago (the oldest human footprints found in the Americas were about 10,000 years ago), and there was no reproductive isolation. Skin color is controlled by genes on the autosome, which is manifested by the number of melanin granules in **, and human beings are not reproductively isolated from each other, modern people can already reach all parts of the world, the scope of gene exchange is larger, and people of different nationalities often combine the characteristics of both parents.

Only take Chinese history, the skin color and other characteristics of the Han and other ethnic groups will also be different, but after thousands of years of migration and integration, the skin color of Chinese residents is mainly yellowish, genetic testing can tell us the ** of modern human genes, we can know that there is no so-called "pure-blooded people" concept, are the product of human gene exchange and integration in history. With the development of the world economy, there are many things such as cross-border travel and work, and the combination of people of different races is becoming more and more common, and there is reason to believe that in the distant future, human genes will be more integrated, and skin colors will be closer and closer.

The evolution of skin color is also a very long-term process, the skin color of people all over the world becomes the same can not appear overnight, due to the influence of culture, the future may still affect the combination of people of different skin colors, and now the earth has 7.5 billion people, the integration of skin color is not easy, the future may still maintain a different skin color. Now, the color of human skin is adapted to the environment and evolved, which we call racial differences. In fact, a long time ago, there may have been a white race in Africa, but as a result of natural selection, in the end, only blacks who could adapt to the environment remained.

It can be seen that it is the difference in the earth's environment that creates human beings of different colors. As long as the earth's environment is different, human skin color will never be the same.

Why do people have different skin tones?

This is basically impossible due to the different environments in which people of different skin colors live. For example, Africans living in hot areas cause their skin color to appear black, and like Russians living in cold regions causing their skin color to appear white, people's skin color is caused by their own genes and living environment, so it cannot be the same.

No, it won't. Because today's human beings have been divided into many species. Purification will only evolve according to its own race. It doesn't evolve into the same skin color.

No, the skin color is different, because of geography and climate, the earth is so big that it is impossible for the global climate to be unified.

No. Because human beings live in different parts of the earth, and the environment of each place is different, human beings will have different skin colors, so human beings will not evolve into a human race with the same skin color.

Not necessarily, skin color has nothing to do with intelligence, intelligence is mainly based on one's own efforts and talent, and the more you work hard to develop, the smarter you will become, and it has nothing to do with skin color or anything.

No, it's not that the more you evolve, the lighter the skin tone, people all evolve to the same level, but still have different skin tones. There is no correlation between skin color and intelligence, whether it is black or white, or yellow, there are smart people and stupid people.

No, human radiation is due to climate reasons, the more melanin in the body, the darker it is, and skin color has nothing to do with intelligence.