Why don t humans have wings, why don t humans have wings?

In terms of homology, the mammalian branch has only four limb buds, so it can only develop four appendages. If you have hands, you can't have wings.

In addition, it is not more advanced to have wings, the most advanced in this branch of vertebrates are mammals, but most mammals do not have wings. The so-called advanced, on the one hand, appeared later in the history of evolution, and on the other hand, more importantly, it is more adapted to the environment. The dexterity of human hands is unmatched in the entire biological world, and if they give up their hands and develop into wings, they may not be more adaptable to the environment.

Genetically speaking, although humans and birds are homologous, there is no evidence in modern science that there has been a winged stage in the phylogenic history of human beings, so there are no genes and regulatory factors related to the organs required for the formation of wings in the human genome, so they cannot grow wings.

If you mean that humans can fly with wings, I would say that with the current constitution of human beings, they cannot fly:

First of all, the bones of birds, pterosaurs, bats, etc., are hollow and lose weight but not strength, and the skeletal structure of humans is not suitable for flight

Secondly, flying animals need to consume a lot of oxygen, birds have a well-developed air sac system, bats and other lungs also have special structures to adapt to high-intensity breathing, and other respiratory organs such as lungs or corneas of modern humans are obviously not suitable for this activity;

Finally, flying requires strong muscles to drive wings, which can be seen by observing the keel process of birds and the clavicle structure of bats, strong muscles need attachment points, if humans also want to have wings, then in order to fan the wings, a sternum of at least several times the width of the body is needed to provide attachment points for the muscles;

There are also many factors such as metabolites, excretory and circulatory systems.

Therefore, the human body's own conditions are not suitable for having wings!

The landlord thinks about it, how much bigger people are than birds. At this scale, we need to have at least two meters of wings to fly!Two meters, two meters, who can swing it?

Two or three swings at most. Even if it is really waved, more than a billion pairs of two-meter-long wings will not cover the sky and the sun, how can plants grow?The sun is all gone, which means that there will be nothing on the ground, and what will we eat after the flight-

So the fact that humans don't grow wings is quite correct and very reasonable =v=

It's useless to have wings, and you can't fly.

First, human bones are solid and too heavy.

Second, humans don't have a strong muscle group that can flapping their wings when flying.

Thirdly, human beings do not have such a structural ...... as a "keel".

In short, the structure is different, people are people, birds are birds, insects are insects, people have brains, so they don't use wings.

Normal people don't have wings.

Data Extension:

Wings are the organs of flight for birds and insects. The wings of insects are able to move in harmony and fly very effectively, and they are the small "interlockers" between the powerful flight muscles and the hindwings. When not in use, it can be folded on the back of the body, and the wings are generally triangular.

Birds have specially arranged flight feathers on their wings, and when winged, each feather has a slight ability to rotate. Therefore, the two wings continue to fan up and down, which will produce a huge downward pressure resistance, so that the bird body can fly forward quickly.

The bat's unique flight organ, the wing hand, is formed by a soft and tough membrane between the end of the phalanges and the humerus, the side of the body, hind limbs and the tail.

Insects are the only winged animals among invertebrates. Flying makes insects more skilled than land animals in foraging, courtship, avoiding predators, and expanding their range, and has become the basis for the prosperity of insects.

Unlike birds, which are transformed from their forelimbs, insect wings are developed from lateral dorsal lobes that expand to the sides.

The wings of insects are very flexible and can be folded on the back of the body when not in use. The wings are generally triangular, and for the convenience of research, each side and corner is given a certain name, and the wing surface is divided.

The wings used by insects to fly are membranous, and there are criss-cross wing veins on the wing surface, which are actually formed by thickening the wing surface in the trachea, which is like a skeleton to support and reinforce the wing surface, and is also related to the torsional movement of the wing during flight. Some insects have fine wing veins, such as dragonflies, mayflies, lacewings, etc.

Some wings have few veins, such as flies with only a few veins. Each type of insect has its own unique distribution pattern of infiltrated wing veins, which is called pulse phase (or pulse sequence).

Generally speaking, insects have only one pair of wings that are more developed; It is mainly used to take on the task of flying. For example, Coleoptera and Orthoptera insects are responsible for flight by hindwings, and their forewings have undergone different degrees of ossification and thickening, which can play a protective role in the folded hindwings.

I think that man does not have wings because he is a primate and has a different evolutionary route than birds, so he does not have wings.

Legend has it that after Adam was expelled from the Garden of Eden, he went to the world to cultivate and reproduce, and his pursuit of happiness was as immortal as life. Although she gave a lot, she received a small amount of happiness, and he never gave up, so life lasted for a long time.

God was naturally carefree, but happiness bore him so much that he was jealous and took pity on Adam's endless toil, so he sent Adam back to the Garden of Eden and said, "I have a happy seedling here, and if you take care of it, happiness will grow with it." Adam took the seedling back to the world, and it didn't take long, and happiness grew with the seedling.

Adam longed for happiness so much that he was afraid of losing the seedling, so he simply cut open his back, planted the seedling in his body, and vowed to make him grow with flesh and blood, and then he would be much happier, almost similar to the Garden of Eden.

This time God was really jealous, and he wanted to play a trick on Adam, so he invited Adam back to the Garden of Eden again. Adam naturally has indescribable gratitude to God, and God generously said that I still have the same happy seedling here as last time, and asked Adam if he still wants it, and Adam said no, I am already very happy. God was dissatisfied

How can you do it, your happiness is as slow as walking, and it is very hard, have you ever seen a bird flying, if you have this, your happiness will be as free to choose as a bird." Adam longed for more freedom, so he said, "All right, I want to."

God said, "Give it to you, but you must treat her as you did to the one before you, and the slightest deviation will be a hundredfold pain." Adam was confident that he would treat everyone equally, and vowed to treat her equally, so he planted her on his back as well, and soon Adam had beautiful wings that were the envy of all living beings.

Adam can naturally fly in the sky, but he is not as free as a bird, because the situation in the air is too complicated, and the flight is affected by various factors such as air currents, wind, terrain, steering, ascent, and descent, and it is inevitable that the force will be different, so it is almost a curse for him The pain is greater than the happiness of flying freely in the sky. He was very cowardly, and in the case of not being able to resist the pain, he compromised, and decided not to go to heaven anymore, and walked underground to live his previous life, but it still didn't work, and one was in the middle before, and he could walk any way, but now it is not good to balance the house, and the grass, dead branches, leaves, rocks, mounds, birds, and beasts under him also affect him left or right, and naturally gave birth to a hundred times the pain.

Adam understands that absolute fairness does not exist, and more happiness is unrealistic, and he has made a poisonous vow to use his flesh and blood to care for two happy seedlings for the rest of his life, and he is very embarrassed. In the end, on a moonless night, he cut off two beautiful wings at the same time with a great axe, and because the wounds were bleeding at the same time, Adam died soon after, and never gave birth to wings again.

Genetically speaking, although humans and birds are homologous, there is no evidence in modern science that there has been a winged stage in the phylogenic history of human beings, so there are no genes and regulatory factors related to the organs required for the formation of wings in the human genome, so they cannot grow wings.

If you mean that humans can fly with wings, I would say that with the current constitution of human beings, they cannot fly:

First of all, the bones of birds, pterosaurs, bats, etc., are hollow and lose weight but not strength, and the skeletal structure of humans is not suitable for flight

Secondly, flying animals need to consume a lot of oxygen, birds have a well-developed air sac system, bats and other lungs also have special structures to adapt to high-intensity breathing, and other respiratory organs such as lungs or corneas of modern humans are obviously not suitable for this activity;

Finally, flying requires strong muscles to drive wings, which can be seen by observing the keel process of birds and the clavicle structure of bats, strong muscles need attachment points, if humans also want to have wings, then in order to fan the wings, a sternum of at least several times the width of the body is needed to provide attachment points for the muscles;

There are also many factors such as metabolites, excretory and circulatory systems.

Therefore, the human body's own conditions are not suitable for having wings!

Because of the selective expression of genes.

Why haven't humans been able to evolve wings? The answer may not be as simple as you think.

Sometimes they are very envious of birds, they can fly freely in the sky, they can overlook the earth, and if humans want to fly, they have to use certain tools, and some people are curious, why haven't humans evolved wings? The answer may not be as simple as you think.

First of all, we can observe those animals that can fly by themselves, generally speaking, the weight of such animals is relatively light, not to mention flies and mosquitoes, even if the eagle is very heavy in birds, basically it is not too heavy, but human beings are different, after human adulthood, forty kilograms of weight is considered very light.

Some people may want to say, that human beings can become thinner and thinner, no, the reason why human beings can become the masters of the earth, the primate of all things, is not determined by the force value of human beings, to let a person fight alone, it is basically impossible to beat an adult orangutan, let alone other beasts, but by human intelligence to decide, if the weight becomes very light, then the human brain capacity will become less and less.

Secondly, if the brain capacity becomes less, then human intelligence will become low, the brains of birds are basically not fully developed, they rely on their own instincts to engage in a series of activities, if humans have a pair of big wings like birds, can soar on the earth, then it is estimated that it will not be long before no creatures can master the existing knowledge of humans.

From Darwin's point of view, living things have no choice in the process of evolution, living things can only be chosen, and the choice is in the hands of nature, in other words, it is not that wings have not evolved, but that nature does not allow humans to have wings, and among all types of animals, birds are the least likely to evolve again.

However, some scientists also believe that it is not that humans have not evolved wings, but that wings have evolved into human hands, and although humans cannot fly, their hands can make many tools to help humans realize this dream.

On the other hand, the reason why humans don't have wings is because they can get enough food on land, and in ancient times, people hunted and shared food together, and in the later development of agriculture, people would grow their own crops for food, so wings were not necessary for humans.

To sum up, the reason why human beings do not have wings is due to a variety of reasons, if human beings have wings, then the highest IQ on the earth today may be the orangutan, from the perspective of evolution, in fact, the reason why human beings can become like this is not inevitable, but due to one accident after another.

The wings received the physiological resources that originally belonged to the brain, and then the adaptation problems faced by the ancestors of the human zhi class changed, and he finally evolved into the form of the answer, which is a variety of birds.

The above is half-tone nonsense. The reason why humans have not evolved wings may be due to the fact that (1) the evolutionary process is too short, and there has not been enough time to evolve significant wings (the possibility of the existence of adaptors);(2) The adaptive benefits brought to humans by evolved wings are lower than the average cost, and there is not enough competitiveness (fitness of organs) ...... for survival and reproduction