There are 10 stages of human evolution, what are the four stages of human evolution?

The four stages of human evolution have gone through four stages: ape man, primitive man, sapiens man, and modern man.

Human evolution originated from forest apes, and developed step by step from primates through a long evolutionary process. With the development of archaeology, prehistoric civilization has been gradually denied, and archaeology has most of the evolved fossils of apes. In conjunction with the discoveries of modern biology, it was discovered that genetic DNA is evolutionary, confirming the authenticity of the theory of neutral evolution.

Australopithecus australopithecus in human evolution

Australopithecus is known as "Man in the Making". Ancient apes first appeared in eastern and southern Africa, gradually evolved from primitive apes, and differentiated into lower apes (such as gibbons), higher apes (such as orangutans), and ancient apes. About 12 million years ago, crustal movements created a Great Rift Valley in eastern Africa.

The formation of the Great Rift Valley divides Africa into two independent animal systems, the East and the West, and the barrier of the Great Rift Valley has become the key to the separation of humans and apes.

In the east of the Great Rift Valley, due to the changes in the earth's crust, the rainfall gradually decreased, the woodland disappeared and the grassland appeared, and most of the ancestral groups that shared the same ancestor with the present apes became extinct.

About 5 million to 8 million years ago, some chimpanzee-like ape species successfully established founder groups in the area around the rainforest and the savannah, and successfully evolved into Australopithecus. When the study of protein and DNA differences finally established a molecular clock, the findings showed that the cut-off point between humans and other animals was 5 million to 8 million years ago, and the history of hominids began.

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It's hard to say, because there are different divisions.

1. The history of human evolution is divided into three stages: ape-man, ancient, and new-man.

2. The history of human evolution is divided into three stages: the hunter-gatherer era, the agricultural age, and the industrial age.

3. The history of human evolution is divided into four stages: ape man, primitive man, sapiens man, and modern man.

4. The history of human evolution is divided into four stages: early ape-man, late ape-man, early Homo sapiens (ancient), and late Homo sapiens (new man).

Primitive humans began to appear about 3 million to 2 million years ago. The development of intelligence and culture is an important sign of human evolutionary development.

Australopithecus is the most primitive hominoid family that is differentiated from apes, with mixed ape-human characteristics, and can walk upright. It represents a transitional stage in the evolutionary process from ape to man. They lived between 5 million and 1.2 million years ago in East and South Africa.

Their brain volume varies from 450 milliliters in the early stage to 725 milliliters in the late stages. They may have the ability to improvise on the use of branches, sticks, and rocks like modern apes, but do not have the ability to consciously make tools (stone tools).

About 2.5 million years ago, Australopithecus evolved the first hominid to use and consciously make stone tools

Capable. They lived between 2.5 million and 1.5 million years ago, representing the early ape-man stage in human evolutionary history. They have an average brain volume of about 640 ml.

The stone tools they make are very simple and crude chopping tools made of gravel, known in archaeology as the Olduvey culture. So far, the human fossils and cultural sites in this evolutionary stage are mainly distributed in East Africa and Yunnan Province in China. The Yuanmou ape man in Yunnan, China, lived about 1.7 million years ago.

Human evolution originated from forest apes, and has gone through four stages: ape-man, primitive man, Homo sapiens, and modern man.

Ape Man: It has the dual physiological characteristics of humans and apes, and lived about 2 million to 340,000 years ago. The ape-man skull is low, the brow spine is prominent, and the teeth are large, which has the intermediate nature of ape and man.

They were already able to make stone tools and were the first to make tools. Ape man can be divided into early ape man and late ape-man.

Homo sapiens: The period of prosperity of early humans, often thought to have been around 200,000 years ago, was a period during which Homo sapiens masters reached a jaw-dropping boom. From the tropics to the north and south poles, almost everywhere in the world where there is land is inhabited by humans.

The distribution of a simple species of animal is so wide, only Homo sapiens. Homo sapiens can be divided into early Homo sapiens and late Homo sapiens, and the image is basically similar to that of modern humans.

Modern man: The skeleton is the same as ours, and the humans of this period are generally known as Cro-Magnons, who built houses, carved and painted, and even made jewelry.

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 had the basic characteristics of human beings, 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 large, can make more advanced paleolithic tools, and began to use fire, such as the Beijing ape man in Zhoukoudian, Beijing, China.

3. Early Homo sapiens (ancient people) stage: 10-200,000 to 50,000 years ago, gradually detached from the characteristics of apes, and very close to modern humans, such as Neanderthals in Germany.

4. Late Homo sapiens (new man) stage: about 4-50,000 years ago, the evolution of human beings at this time has accelerated significantly, and it has been very similar to modern humans in form. 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 distributed all over the world The origin and development of human beings is a very complex issue, although after the efforts of Darwin and others and more than 100 years later, there are still different opinions and questions.

Humans first evolved in Africa, and most of the evolution of humans took place on the African continent. Because the fossils of early humans who lived between 6 million and 2 million years ago came entirely from Africa.

Currently, most scientists know about 15 to 20 different species of early humans. However, scientists are not entirely consistent in their understanding of the relationship between these species and which species are extinct.

Many early human species, most of which did not leave any surviving descendants. Scientists are also debating how to identify and classify specific species of early humans, as well as the factors that influenced the evolution and extinction of each species.

The earliest migration of early humans from Africa to Asia was probably between 2 million and 1.8 million years ago. They entered Europe relatively late, between 1.5 million and 1 million years ago.

The species of modern humans only appeared in many parts of the world much later. For example, people may have first come to Australia in the last 60,000 years, and the Americas for the first time may have been around 30,000 years ago.

The beginning of agriculture and the rise of the first civilizations took place in the last 12,000 years.