How did man evolve and mature? It s like a square figure, and so on.

This question is actually a misunderstanding of evolution, based on the understanding that evolution makes living things more and more perfect.

In fact, there is no such thing as perfection or maturity in any living being. All species are in the process of evolution, and what will evolve in the future (including external morphology and internal function) is unpredictable, and the driving force of evolution comes from the following two:

genetic changes, as well as natural selection.

Natural selection also includes intraspecific selection (e.g., sexual selection), interspecific selection (confrontation between species, e.g., wolves eating sheep), environmental selection (environmental change), and luck selection (contingencies).

It is up to the organism itself to make genetic changes, and it is up to the organism to decide who to choose. Only when the external choices are constantly changing, the evolution of living things will be constantly changing, and the creatures that mix best at the moment may immediately become losers in a different environment.

Therefore, all living things are in evolution, and there is never a day when they will mature or be perfect.

The evolutionary process of human beings can be divided into four stages: (1) Early ape-man stage: It lived about 3 million to 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 is like a man, the brain is larger, can make more advanced paleolithic tools, and began to use fire, such as the Peking 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.

In the early days, man was a fish in the ocean, and the fish slowly evolved into the first reptiles, and in order to avoid the dangers on the ground, the reptiles climbed trees, and they became apes, or pre-human stages, but trees don't always exist in one place, so after slowly evolving, they became homo sapiens, and apes were finally able to stand and walk, and they became Homo erectus, and in the process, the volume of the human brain became larger and larger, and finally evolved into Homo sapiens. Early Homo sapiens had a protruding frontal bone and a large amount of hair, and as humans evolved, the hair slowly disappeared, and the frontal bone slowly **. Homo sapiens in the late period, when man was already very much like modern man, evolved from stone to iron farming tools and social systems, from primitive society to feudal society, to today's man.

Australopithecus – fully formed man (ape-man) – early Homo sapiens – Late Homo sapiens – modern man.

For more details, you can look for the history of the first year of junior high school.

In fact, our human beings exist on the earth at all, and there are no living creatures at all, human beings existed on the earth hundreds of millions of years ago, but human beings at that time were taller and larger than our current human beings, and with the slow evolution of the earth, people became smaller and smaller, and in the 4.5 billion years of the earth's operation, there was a great transformation of the earth, almost extinct human beings, and some of the remaining people lost everything and had to start from scratch. Humans on Earth hundreds of millions of years ago were ten times smarter than we are today. Their technology is more advanced than that of our current people, some scientists have found nuclear materials buried under the ground more than 200 million years ago, but these nuclear materials are by no means made by visitors from outside the world, and some magazines have published that some people have found fossilized footprints of people on the earth 200 million years ago, and the footprints are several times larger than our current feet.

So I believe that there were humans on this earth, and not some living creatures. If we don't protect the earth and arbitrarily exploit the source of the earth, our human beings will face a catastrophe, and after too many years, a new kind of human beings will appear, they will be shorter than our current people, they will have to start their lives from scratch, their clothes will be made of leaves, they will be stoned when they make fires, and slowly they will use their wisdom to develop a new life.

Mainly through Australopithecus - Homo erectus - Homo sapiens. With gradual adaptation, they evolved into the human beings they are today.

Don't say it's complicated, don't bother to say it, who doesn't know! To put it simply, people evolve by walking, walking, it's as simple as that!