When did humans first appear?

Human history is now recorded over 6 million years. Humanity goes through four stages of development after becoming fully formed human beings:

One is the early ape-man, also known as Homo sapiens, which appeared between 3 million and 2 million years ago.

The second is the late ape-man, also known as Homo erectus. Its age ranged from about 1.8 million to 230,000 years ago.

The third is early Homo sapiens, also known as the ancients. It lived between 200,000 and 40,000 years ago.

The fourth is Late Homo sapiens, also known as Homo sapiens. Appeared 40,000 years ago to the present. Late Homo sapiens is modern humans.

Re-analysis of a skull dating back 100 million years has revealed that it was an early member of modern jawed vertebrates, meaning that the jaws include tens of thousands of living species of vertebrates, reptiles, mammals, and humans, from fish to birds. Acanths existed in the earliest pre-evolutionary periods of sharks and bony fishes, and this lineage eventually continued into human life.

Scientists have found fossils of the genus Echinosa in Europe, North America and Australia. Compared to other spiny sharks, they are relatively large, measuring 1 foot (about a meter) long, they have gills instead of lungs, and they have large eyes that feed on plankton.

The specific time is difficult to determine, because there is no standard that can count the previous ones, and only the ones after them are considered people, and human beings have gradually evolved from generation to generation! Generally speaking, it is believed that humans were created 5 million years ago.

Humans originated 5 million years ago.

Based on fossil material of Australopithecus and hominin that has been discovered, the earliest humans may have been 3 million or 4 million years ago.

Australopithecus 3 million years ago.

Began to appear, about 1.5 million to 2.5 million years ago, one of the branches of Australopithecus evolved into Homo sapiens, about 2 million years ago, Homo erectus first appeared in Africa, the so-called late ape-man, knew how to use fire, began to use symbols and basic language, Homo erectus was able to use more refined tools.

Late Homo sapiens is anatomically modern man, which began to appear about 40,000 or 50,000 years ago. The main differences in the morphology of the two are the reduction of the anterior teeth and face, the weakening of the brow ridge, and the increase of skull height, which is more obvious in modern humans.

Early Homo sapiens:

Early Homo sapiens generally refers to humans who began to live in the late Middle Pleistocene more than 200,000 years ago and are morphologically between Homo erectus and Late Homo sapiens. Ancient Chinese humans such as Dali Man, Jinniushan Man, and Maba Man are generally classified as early Homo sapiens.

The Neanderthal Valley was the first to be taken seriously.

Found human fossils. Therefore, in the past, paleoanthropology used to refer to early Homo sapiens fossils as Neanderthals. Fossils from the early Homo sapiens (hominis) stage have been found in many parts of Asia, Africa, and Europe.

Between 380 and 3.6 million years ago. In 1978, human footprints left in the volcanic tuff were found in the Letolier strata, belonging to two individuals, one large and one small. The footprints have raised, rounded heels, and the big toe is juxtaposed with the other four toes in front of the foot, which are human characteristics that some scholars have classified it as a homo sapiens.

But no stone tools have been found in the same strata. et al. believe that the fossils found in the Letolier strata are Australopithecus alfa, not real humans. The Mozoctor Man, originally known as Mozoctor Ape Man, was found in the Mozocto ape, and some people have studied and thought that it may have belonged to Homo sapiens, dating it to about 1.9 million years ago.

The Mystery of the Birthplace Europe, especially Western Europe, was once considered the birthplace of humanity. Paleoanthropologists have been trying to find the right one for this series of questions. Most paleoanthropologists believe that

Real people are marked by manufacturing tools, and before the appearance of real people, scientists call them "predecessors". Erection is a morphological sign of the separation of man from the main trunk of the common ancestor of the apes, and the area from which he separated from the main trunk can be described as the earliest cradle of humans. Human beings continue to evolve and develop, and finally become modern people, and at the same time form different modern human races, and the area where this evolutionary process is completed is the last cradle of human evolution.

When exploring, it is necessary to establish a premise that human beings are a biological species, and they can only have one ancestor, and cannot be multiple ancestors. It cannot be said that blacks have one ancestor and whites have another. Because although different species can marry each other, they cannot give birth to offspring, and only the same species can have children.

If we advocate the theory of human multi-ancestry, we will make a common-sense mistake in biology, which has confirmed that human multi-ancestry or pluralism is contrary to scientific common sense. Whether humans separated from the ape trunk in Africa, then into Asia, or whether they started in Asia has been a topic of debate among paleoanthropologists for more than a century. More than 70 years after the first juvenile Australopithecus skull was found in Africa in 1924, a series of human fossils have been found in Africa, and this series of fossils constitutes a fairly complete system.

In contrast, fossils excavated from Asia are difficult to compare, so most paleoanthropologists believe that it is more likely that humans originated in Africa. Anthropologists, archaeologists, biologists, chemists, and even philosophers and religious scholars have studied the origin of human beings from various angles, but no one has yet been able to explain it. There are many myths and legends about the origin of mankind among various peoples, and some of them coincide, but of course there are differences, in these myths.

Summarizing the various myths, the origin of human beings can be divided into five types: "called out", "originally existed", "plant evolution", "animal evolution", and "created by dust".

Humans appeared 250,000 to 40,000 years ago. It is generally believed that Homo erectus evolved from Homo erectus, but it is controversial[1] that Homo erectus became extinct after the later rise of Homo sapiens (modern humans) out of Africa or before that. Late Homo sapiens (new humans) are anatomically modern humans.

It began to appear about 450,000 years ago. The main morphological differences between the two are the reduction of the anterior teeth and face, the weakening of the brow ridge, and the increase in skull height, which is more pronounced in modern humans. Late Homo sapiens arms were no more than knees, body hair was degenerated, there was language and labor, and there was a social and class character.

Historical development of mankind: Homo sapiens evolved from Homo erectus with a larger brain capacity. Modern humans (homo sa pianssapians) and Homo sapiens belong to the same species.

The development and complexity of the brain may be conducive to social life in groups, which is very conducive to cooperative prey, food gathering, and information exchange, thus giving Homo sapiens an advantage in the competition for survival. Obvious religious rituals have developed among Homo sapiens, and these rituals may have been based on the idea of life and death. According to current research, animals probably do not have a concept of life and death.

Homo sapiens began to dig graves for the dead of their kind, placing tools and clothing in the tombs so that the dead could be used in another world. The above content reference:

Humans are classified from the animal kingdom, and taxonomically homosapiens belong to the subphylum Vertebrates, Mammalia, Primates, Apes, and Hominidae.

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.

Generally speaking, the sign of human appearance is upright walking, and the time of the appearance of ancient humans, some people believe that it should be between about 5 million and 7 million years ago, although this conclusion is currently somewhat debated, but there is no doubt that it is at least about 4 million years old. Since the 20th century, archaeologists and paleoanthropologists have found fossils of ancient humans or remains of tools used by ancient humans in many parts of the world, such as Africa, Asia, and Europe. For example, the 1.7 million-year-old human bone fossil discovered by Yuanmou in China in 1965; The fossilized bones of Australopithecus australopithecus "Lucy", discovered in Ethiopia's Hadar Valley in 1974, were determined to be at least 3 million years old, and so on.

All the evidence points to multiple sources of human origin. The early evolution of humans was very slow, after about millions of years of evolution, only about 200,000 years ago, humans evolved into early Homo sapiens, about 100,000 years ago, humans evolved into late Homo sapiens, and modern humans belong to late Homo sapiens. Obviously, in this long evolutionary process, not all ancient humans can evolve into late Homo sapiens, that is, modern humans.

So where did the modern people scattered around the world today come from? Did they come from the same place, or did they evolve from local hominins, or was there something else? This is a question that anthropologists have been studying for a long time.

Now many people think that all modern people in the world are from the African continent, about 200,000 years ago, due to great changes in nature and ecology, the black pygmies in Kenya in East Africa began to go out of Africa, about 100,000 years ago, they reached the current Middle East, and then scattered to all parts of Asia, about 60,000 years ago, they arrived in today's America and Australia, gradually replacing the original Homo erectus around the world, and evolved into the common ancestor of modern people all over the world. In 1999, scientists from the Center for Human Genetics at the University of Texas in the United States and Chinese scientists jointly wrote an article pointing out that popular genetic studies proved that the ancestors of China's Homo sapiens, that is, the yellow race of Asians, were also black people from Africa, and that about 40,000 to 60,000 years ago, modern humans in Africa came to southern China and gradually replaced the ancients on the Asian continent. However, there are also some scholars who oppose the idea that humans share an African ancestry.

For example, some Chinese scholars believe that modern humans in China originated from early Homo sapiens in China, and they believe that ancient human fossils found throughout China prove that from Homo erectus, represented by Peking Man, to modern Chinese, there was no interruption, but only a small amount of hybridization was incidental.

It is said to be a process from scratch, although there is no exact research at the beginning, I have seen a **, it seems that it should be separated from a single-cell aggregate, everything is differentiated from this cell, but plants are the first to be separated, which everyone knows.

It's okay to express, but you have to write when he appeared? Otherwise, they don't know when the person appeared.

Generally speaking, the sign of the appearance of human beings is the time of the appearance of ancient humans. Some believe that it should be between 5 million and 7 million years ago, and while this conclusion is currently somewhat debated, there is no doubt that it is at least around 4 million years old.

The early evolution of humans was very slow, after about millions of years of evolution. It was only about 200,000 years ago that humans evolved into early Homo sapiens. About 100,000 years ago, humans evolved into late Homo sapiens, and modern humans belong to Late Homo sapiens.

During this long evolutionary process, not all hominins were able to evolve into late Homo sapiens.

Nowadays, many people believe that all modern people in the world are from the African continent. About 200,000 years ago, due to great changes in nature and ecology,