According to the current level of science, the origin of any species has relative uncertainty.
The origin of the earth, the origin of mankind and the origin of life are known as the three major problems of science.
The theory of evolution states: "No creature appeared out of thin air, but went through a long history of evolution."
So how did the first man on Earth come about?
<h1 class= "pgc-h-arrow-right" > the origin of life</h1>
It took the Earth about 1 billion years, under certain conditions, the collision of various substances to give birth to the first life - primitive single-celled organisms.
Then, as single-celled organisms rely on instinctive mutual engulfment and changes in the environment,
Multicellular organisms evolved, and gradually there was a diversity of life.
The evolution of species is a process from low to high, so the more backward the organism, the higher the higher. This is what evolution says about the origin of life.
<h1 class= "pgc-h-arrow-right" > the evolutionary history of paleo-apes</h1>
In the Great Rift Valley of East Africa, fossil skulls of the earliest ancestors known to generations have emerged.
More than 12 million years ago, forest apes were widely distributed in Africa, Asia and Europe, especially in the tropical jungles of Africa, and later due to environmental changes, forest apes evolved in two directions.
Some forest apes are still dominated by arboreal life, and slowly evolved into modern apes, such as chimpanzees, orangutans, gorillas, gibbons and so on.
The other, due to environmental changes such as the massive disappearance of forests, was forced to go down to the ground to live, and slowly evolved into humans.
About 8 million years ago, our ancestors had to change from arboreal to terrestrial, and after more than 4 million years of evolution, the first apes that walked entirely upright appeared - Affaron!
Compared to crawling, upright walking is more labor-saving. And walking upright can free the hands and play a crucial role in the subsequent evolution!
Over the next million years, the African continent saw the emergence of a variety of ape-men who could walk upright, and the living environment of the able-man was much worse than that of other ape-men.
In the course of evolution, the teeth of the Noh began to approach that of modern humans, which led them to begin to transform into omnivores.
In the process, meat eating makes them smarter and learns to use some simple tools,
Over the next million years, the formation of arctic and antarctic glaciers led to the large amount of water in the Earth being locked up in the north and south poles. Africa became hotter and drier, so hair became a burden to our ancestors.
Slowly, the nominees evolved into craftsmen, who had a long nose similar to that of modern humans to moisten the air they inhaled.
Bodies with few hairs can help them better dissipate heat, and they learned to use fire millions of years later.
In the hundreds of thousands of years that followed,
Some of the craftsmen explored Asia, and evolved into Homo sapiens in the south of China, some to Europe to explore and evolve into Heidelbergers, cavemen, and some of the Heidelbergers returned to Africa.
This is one of the reasons why there are all kinds of people living in the world now, with different habits and languages!
About 200,000 years ago, the Heidelberg people who returned to Africa were drastically reduced or even endangered due to extreme drought. At this time, only resourceful and inventive people can survive, although the number of people is reduced, but the ability to adapt is greatly enhanced,
In this process, only for their own future considerations can they continue to live, so these people have imagination.
<h1 class= "pgc-h-arrow-right" > the current research results of chromosomal human molecular genetics, supporting the hypothesis that humans have left Africa. </h1>
Mitochondrial DNA in human cells is only inherited in the maternal line, and molecular biologists find evidence from human mitochondrial DNA, and people all over the world are descendants of An old grandmother in Africa, Lucy.
At this point, an important point in the history of evolution has been confirmed.
The birth of any creature is not a single, and the ancestors of human beings are the same, but this group of ancient apes has made decisions and actions that other ancient apes have not made, and only now has it become human beings!