How did humans gradually develop to walk upright? What factors are associated with walking upright?

Human beings slowly evolved from chimpanzees and gradually formed upright walking, at first because carnivores had to hunt every day and run and walk every day, and later evolved into human civilization not living in the forest.

Human beings have formed the habit of walking upright through continuous evolution, because walking upright is more flexible, and at the same time, the free hands can use tools, etc., and a combination of factors has led to this evolutionary direction.

Human beings first walked on the ground on all fours like animals, and then slowly evolved to walk upright, which has a lot to do with the skeletal structure of the human body.

Humans slowly evolved from apes, and certain conditions must be required to say that walking upright. It is mainly with the environment and the needs of survival and other problems that it gradually forms upright walking.

<>When did humans start walking upright? Why did humans evolve towards walking upright? As far as this question is concerned, I believe that many people have a lot of questions, because we all know that in our real life, with the development of economy and society, our country's science and technology are also constantly developing and progressing, and it is precisely because of this that our society is showing a thriving appearance.

The changes in our society have also given rise to the discipline of sociology, of course, for the origin of human beings.

And the study of human society, which is very important, because it can be clearly explained to a large extent, to see where our human beings are going, and we can also see the continuous development of our human society, and the development of the original source.

In antiquity.

At that time, our society was not yet formed, but after the opening of the world, the natural world began to develop and change, and all living things in nature were constantly developing and changing. At the beginning of the opening of heaven and earth, there was no human existence in the development and change of our entire natural world, and human beings were constantly formed in the later social changes, so we have a strong interest in the development and change of the entire natural world and the formation of human society. Humans began walking upright about four and a half million years ago, when humans and apes began to draw a clear dividing line.

When man successfully evolves, he becomes a human being, and he begins the life of human society.

Man began to learn to use fire and other tools, which is also the biggest difference between man and ape, and later people had an ideological consciousness and had greater development. One of the important reasons why people have gone from crawling to walking upright is the need for social development, and the needs in the process of our social development are evolutionary and social needs, and they are derived from the development and changes of the century. For people to walk upright, everyone should be very familiar with it, upright walking is more suitable for the development and change of society, only in this way, can promote the process of human society.

Humans were able to walk upright in the early ape-man stage. In this way, you can improve your quality of life and make your activities more free, so this evolution will happen.

It started in ancient times, because it was more convenient for humans to make it, and humans used tools, so there was such an evolution.

4.5 million years ago. Because this way can make people live a better life, better catch some prey, and observe some things conveniently.

According to the law of survival of the fittest, many creatures could not adapt to the changes in the climate and were eliminated by the wanton grinding, and some ancient apes were forced to come down from the trees and go to the flat land in order to survive. Originally, they lived on trees, picking wild fruits to satisfy their hunger, and did not have to worry about food. Nowadays, ready-made food no longer exists, and in order to survive, they must hunt wild beasts in search of new food.

During this process, their limbs and brains begin to develop. The need for hunting and transporting prey allows the limbs to gradually separate their functions. Engels once pointed out that walking upright was a "decisive step" in the process of transformation from ape to man.

The upright walking of Australopithecus led to the division of labor between the front and rear limbs, which were engaged in more and more activities. After a long period of training and evolution, they gradually learned to make and use simple tools, from occasionally discovering and using natural tools, such as hunting with sticks and stones, to using natural tools regularly. In the harsh living environment, they have to fight with wild animals and nature, the division of hands and feet, walking upright makes their horizons gradually broaden, more and more information from nature, the brain capacity increases, and the brain gradually develops.

Engels said: "Labor creates man himself. "In the long process that followed, their bodies and intellect developed greatly, they found more food for their travelers**, and they learned to farm.

Pros: After humans begin to walk upright, it helps to increase the brain volume of the brain, and it is also conducive to the use of tools, which is the most essential difference between humans and animals.

Disadvantages: Increased burden on the heart when walking upright, easy constipation, hemorrhoids, bone damage.

The brain of Homo erectus has enlarged significantly, and the brain volume of early members has reached about 800 ml, and the brain volume of late members has risen to about 1200 ml, with an average of about 1000 ml. And not only has the brain increased in size, but its structure has also become more complex and reorganized, showing that Homo erectus has developed quite complex cultural behaviors.

The decisive factor in the transition of human beings from crawling to walking upright is the liberation of the upper limbs.

Explanation: Through sequencing in DNA molecules, scientists discovered that the earliest humans originated in Africa. About 15 million years ago, the forests of the African continent were inhabited by many species of apes and monkeys, including early human ancestors.

The movement of the earth's crust has raised the altitude of eastern Africa, forming a plateau about 2,000 meters above sea level. About 120 million years ago, with further movement of the earth's crust, a north-south rift valley was formed in eastern Africa, which today we call the Great Rift Valley. One thought that upright walking was an effective way of walking, and the other thought that walking upright could liberate the upper limbs and bipedal walking was inefficient, so the way of walking must be to untie the hole and put the upper branch to carry things, and at the same time, walking upright is not only to carry things but also to carry a baby.

Finally, walking upright consumes only 25% of the energy consumed by walking on four bridges. Therefore, the reason why human beings walk upright is not determined by one factor, but by the combined action of many factors.

In the process of constantly adapting to the changes in natural conditions, Australopithecus gradually became accustomed to walking upright, and walking upright freed up their hands, which provided the possibility for Australopithecus to learn to make and use tools and promote brain development. As Engels said: "This completes the decisive one from ape to man."

Let science tell you the answer to why our ancestors were able to walk upright, and the mystery will finally be revealed.

About 4.5 million years ago, humans and apes began to diverge, giving rise to Australopithecus ramanacus, which later evolved from Australopithecus australopithecus 2 million years ago, and then further developed into modern humans. Regarding the process of human development, it is generally divided into four stages:

1. Early ape-man stage. It lived between 3 million and 1.5 million years ago, and already possessed the basic characteristics of humans, such as being able to walk upright and make simple gravel tools.

2. Late ape-man stage. About 2 million to 300,000 years ago, the body resembled a man, the brain was larger, and it could make more advanced paleolithic tools, and began to use fire, such as the Beijing ape man in Zhoukoudian, Beijing, China.

3. Early Homo sapiens (hominid) stage. Between 100,000 and 200,000 to 50,000 years ago, it gradually broke away from the characteristics of apes and was very close to modern humans, such as Neanderthals in Germany.

4. Late Homo sapiens (newcomer) stage. About 4-50,000 years ago, the evolution of human beings at this time showed a significant acceleration, and the morphology was very similar to that of modern humans, and culturally, there were already the art of carving and painting, and ornaments appeared. For example, in 1933, the cave man on the top of Zhoukoudian Keel Mountain was discovered.

At this time, primitive religions had already arisen and had entered a matriarchal society. In the late Homo sapiens stage, modern humans began to differentiate and form, and spread throughout the world.

The use of tools is a sign of the emergence of human beings, as humans today also walked on four feet in ancient times, only because the theory of species evolution was fortunate enough to change our ancestors after thousands of years of evolution. Although humans evolved from monkeys, why not call them humans as well, the most fundamental thing is that animals don't know how to use tools. Of course, only when you know how to use tools will you consciously create tools.

Popular science knowledge, a brief history of human beings for children, how humans began to walk upright.