Humans appeared a few years ago, and humans first appeared many years ago

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 the fossils of ancient humans found in various parts of China prove that from Homo erectus represented by Peking Man to modern Chinese, there has never been a break in between, but only with a small amount of hybridization--- see knows.

It's really human, about a million years.

Typing is not easy, such as satisfaction, hope.

Humans appeared about 7 million years ago (from natural science textbooks).

The earliest human origins.

About 7 million years ago. From the perspective of paleoanthropology alone, the current generally accepted timeline of human origin is that Chadian Shah Man appeared about 7 million years ago, Protohominid appeared about 6 million years ago, Terracus appeared about 5.8 million years ago, and Australopithecus appeared about 4.2 million years ago.

Homo sapiens appeared about 2.5 million years ago, Homo erectus evolved about 1.8 million years ago, and Homo sapiens appeared about 200,000 years ago.

Similar to the fossils, the Xuchang Man discovered by a Chinese and American research team in Henan, China, in March 2020 also faces the problem of multiple interpretations.

Some researchers believe that "the Xuchang Man, which dates back 10,000 years and has mixed characteristics of Chinese hominins, early Homo sapiens and European Neanderthals, is inherited from Zhoukoudian."

Peking Man, the lower part of the early modern man in northern China, put an end to the hypothesis that modern humans in northern China came from Africa. ”

30 200,000 years ago. The earliest early Homo sapiens fossils were discovered in 1856 in a cave in the Neanderthal Valley near the German city of Düsseldorf, and were named Neanderthals.

Early Homo sapiens were found in Asia, Europe, and Africa, such as the Angdong people in Indonesia, the Dingcun people, the Changyang people, and the Maba people in China.

Late Homo sapiens, also known as Homo sapiens, lived about 91,000 years ago, and its fossils were first discovered in 1868 in the Cro-Magnon caves in France, where they were named Cro-Magnon.

The first humans originated about 7 million years ago.

From the perspective of paleoanthropology alone, the current generally accepted timeline of human origin is as follows: Chadian Shah Man about 7 million years ago, Homo homini about 6 million years ago, A. terenopus about 5.8 million years ago, Australopithecus about 4.2 million years ago, Homo homo sapiens about 2.5 million years ago, Homo erectus about 1.8 million years ago, and Homo sapiens about 200,000 years ago. Homo sapiens is the ancestor of our modern humans.

It is understood that the earliest ape-man fossil found in the world is the Javanese ape-man found on the island of Java, Indonesia in 1891, 60 to 800,000 years ago. The Javanese ape-man, together with the Peking man discovered in Zhoukoudian, China, in 1927, was once recognized as the "earliest" human in the world. At that time, it was believed that the history of mankind was no more than 100,000 years old, and the first human beings appeared in Asia.

The Shandong Yiyuan ape man, discovered in China in 1981, belongs to the same era as the Beijing ape-man. However, this theory of the earliest origin of human beings has been overturned by two archaeological discoveries in China. After the liberation, archaeologists successively found ape-man fossils in Lantian in Shaanxi Province and Yuanmou in Yunnan Province.

The Lantian ape-man is 1 million years old, and the Yuanmou ape-man is 1.7 million years old. So, how long is human history? In the last two or three decades, archaeologists have discovered many ape-man fossils on the African continent, giving us a new understanding of human history.

In 1959, an almost complete fossilized ape-man skull and labor tools were found in Tanzania, dated to 1.75 million years ago. In 1972, fossilized ape-man skulls, leg bones and stone tools were discovered in Kenya and dated to 2.6 million years ago. In 1973, it was reported that fossils of ape-man were found in Ethiopia about 3 million years old or 3 million years ago.

From this point of view, human history is not 800,000 years, nor 1.7 million years, but more than 3 million years. As for the earliest place of human appearance, it remains to be determined by more archaeological discoveries.

Humans have only existed on Earth for more than 4 million years. If we look at the time period when most paleontology extinct times, human beings still have at least 1 million years to survive on the earth, and if we look at the ideal of human development, it can be wrong at 6 million years, but now if we think about it in combination with reality, we will find that human beings may only have a few centuries left on the earth.

Sadly, it's not that no living thing or human being can change the environment. Human beings have always thought that they can change the environment, and they have done it, but are we really changing the environment, and when we change the environment, isn't the environment also changing our door?

In the final analysis, the environment is very important for the survival of organisms, just like the ice age, the temperature difference produced a fluctuation of about +-5 degrees, so that the organisms were extinct in a large area, and our human adaptability is of course stronger than them, but if our north and south poles are hot and melted, then we are not far from extinction, and according to the current climate, as long as the north and south poles will completely melt in 5 centuries, at least in 1 million years, the north and south poles will never freeze again, and then tsunamis, drought, floods, famines, And due to the melting of the Earth's North and South Poles, the Earth's equatorial region of the sea**, so that the Earth will become waistline, causing small changes in the magnetic field, these disasters will occur frequently, do you think human beings will change and adapt to the environment by then? Human beings have evolved more than 4 million thoughts on the earth, and the functions of human beings themselves.

It is impossible to adapt to the environment at all, but it is because the human brain is developed, but now that 4 million years have passed, the amount of human brain development is less than %8, and the environment is still changing so fast, although now for the time being, human beings can cope with this situation, but overall.

In the history of biological evolution, there are very few organisms that can evolve on the earth for more than 5 million years, perhaps in some Cenozoic eras.

It could be the future of our humanity ... To emphasize that humans appeared more than 4 million years ago).

The dinosaurs became extinct 65 million years ago. Humans were born 5 million years ago. That is to say, 60 million years after the extinction of the dinosaurs, human beings were born, and humans were differentiated from the animal kingdom, and taxonomically, homo sapiens belong to the subphylum Vertebrates, Mammalia, Primates, Anthropoids, and Homo.

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.