How did we evolve through those dynasties, and how many years were?

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.

There's no exact time to say that it's about when, if we humans evolved like apes, tens of thousands of years ago, and there's been a lot of change in it.

The Evolutionary History of Life on Earth 2008-08-27 09:50:31 Author:Unknown **:World Geography Channel Views:181 Text Size:【Large】【Medium】【Small】

Keywords: life on earth, cryptozoic, phanerozoic, paleozoic, cambrian, ordovician, silurian, carboniferous.

The birth of the earth has been 45-4.6 billion years ago, but we only know more clearly about its history of nearly 600 million years. What happened in the history of the earth is mainly recorded by the rock formations formed at that time and the paleontological fossils they contain; Although the organisms on the earth appeared as early as 30 billion years ago, they have been stagnant for a long time at a very low stage, mainly some low-level fungal and algae plants, and the fossils they leave behind do not show much, and the rock layers that preserve these fossils have mostly undergone different degrees of metamorphosis, which makes this early history of the earth more difficult to understand. It is only about 600 million years ago that a large number of higher organisms appeared, and a large number of unmetamorphized sedimentary rock layers and animal fossils have been preserved, thus providing many more reliable materials.

Therefore, the history of the earth over the past 600 million years is now described in more detail and credible. This is similar to the exposition of human history, which was relatively vague and brief before the written record, but only after the written record did the history of mankind become clear and detailed. In short, the history of the earth and the history of mankind are blurred and brief the farther away from the present, and the clearer and more detailed the closer they are.

From the birth of the earth to 600 million years ago, this period of time in the history of the earth is called the Cryptozoic, although the duration is about 4 billion years, but due to the lack of materials, it has not been able to divide the detailed historical development stage, and is generally only divided into Archean and Proterozoic, and there is no definite boundary between them, so it is often collectively called the Pre-Paleozoic.

When life on Earth evolved from a predominantly lower plant to a predominantly shelled invertebrate, the history of the Earth entered from the Cryptozoic (i.e., the Prepaleozoic) to the Phanerozoic.

Organisms continue to evolve from lower to higher levels, with invertebrates giving way to vertebrates; Among vertebrates, new "strong ones" are constantly emerging, from fish, amphibians, reptiles, mammals to us humans, one after another, playing the leading role on the earth in turn.

In the early Paleozoic era, there were vast areas in the north and south of China that were inundated by the sea. In the sea, algae are still blooming, but much higher organisms have emerged in abundance, an animal known as a trilobite that rules the world's oceans, and there is still no life on land.

Trilobite is a kind of arthropod, the whole body is divided into three segments: head, thorax and tail, and there is a convex central axis running through between the head and tail, and three parts can be divided horizontally and vertically, and there is a carapace on its body, which plays a protective role. Trilobites, which were generally about a few centimeters long, were large animals at the time, and most of them inhabited the bottom of the sea, but a few burrowed into the sand to live or swim in the water.

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.

The evolutionary process from ape to man is divided into 4 steps, including early ape, late ape, early and late homo sapiens.

Introduction to the four stages of the orange and plum stage:

Stage 1: Australopithecus stage

The Australopithecus stage, also known as the "tree-climbing ape group", is 30 million to 10 million years old and is the common ancestor of humans and modern apes.

Stage 2: The ape stage

The anthropoid stage is the formation of species of man, 10 million to 3 million years ago, for example, Australopithecus australopithecus lived in geological age from the Pliocene of the Tertiary to the early Pliocene of the Quaternary, that is, about 6 million to 1 million years ago. At present, the academic community divides the fossil specimens of Australopithecus into four types, namely Alpha, African, Stout and Bao, among which Alpha is the earliest and Bao's is the latest.

Stage 3: Early Homo sapiens

The stage of Homo sapiens, Homo erectus, and Homo sapiens is the "period of human formation". 3 million to 50,000 years ago, such as Zhoukoudian Homo erectus, Neander Homo erectus.

Stage 4: Late Homo sapiens

The late Homo sapiens stage is the modern human stage, such as the European Croma farmer, the Chinese cave man, etc., starting from the late Homo sapiens, human beings began to appear.

Humans evolved step by step from primates through a long evolutionary process.

Human evolution originated from forest apes, and developed step by step from primates through a long evolutionary process. It has gone through four stages: ape man, primitive man, sapiens man, and modern man.

Due to the development of archaeology, prehistoric civilization has been gradually denied, and archaeology has most of the evolved hominin fossils. 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.