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Well. Question from eight years ago.
Let me talk about it first, whether it is credible or not, and do not force it.
Fifteen thousand years ago, the surface of the Moon entered the solar system with a large ice sheet and was anchored near the Earth, but due to excessive inertia, the Moon caused a large amount of ice sheet on the surface of the Moon to be "flung off" to the Earth during the period when it was anchored near the Earth. Large ice sheets could not be vaporized and smashed directly into the ground, causing large-scale geological changes, and some continents sank to the bottom of the sea (the Mu continent where the ancestors of the Chinese people lived also sank, and the Great Western Continent, where the ancestors of the Iroquois people lived in Atlantis, was not spared). When a large number of small ice sheets enter the atmosphere, they are vaporized to form violent and long-lasting heavy rainstorms, resulting in the prehistoric Flood.
Under this devastating catastrophe, although the ancient humans of that era had extremely advanced technology compared to today, they had no power to return to heaven, and few people survived, and the dinosaurs also became extinct at this time (the dinosaurs did not become extinct 65 million years ago, it was another catastrophe).
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1 is basically starvation knotted over 2 natural disasters.
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There is no exact time.
The more powerful disasters that mankind currently understands are celestial disasters, climate disasters, etc., which can be successfully overcome, but there may be other hidden disasters in addition to these. If there are still a few years left before the demise of mankind, don't worry, after all, it seems that human beings are still relatively safe from now on.
Human beings were also born in the evolution of the earth, and after the vicissitudes of life, the current human beings were formed, and the future will always wait for the day when they will be summarized. Although humans claim to be superior animals.
But it is still not worth mentioning in the face of nature, and it may eventually become extinct under the forces of nature.
Claims about the current hidden dangers of mankind.
Industrialization seems to have formed a basic trend, in many ways machines are much more powerful than humans, so many people will choose to use machines instead of labor, because labor is more expensive in comparison. It may be that in the future, robots will completely replace humans, and even robots will be out of human control, and they will successfully attack humans so that humans have nowhere to escape.
However, this statement has also been discussed by many people, some people think that eventually robots will break away from humans and cause unexpected catastrophes, which is one of the ten crazy scientific conjectures, some people think that this kind of thing will not happen, and robots will not turn over flowers after all.
The extinction of humanity is 100% of the thing, but who will replace humanity after mankind is a matter of certainty. Human civilization.
It is not easy to continue to develop to this day, and human beings have always had a spirit of perseverance against nature, and if human beings become extinct, it is difficult for any living creature to be the same as human beings.
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About 1.5 million years old, right?
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Human civilization. There are three reasons why history is only 5,000 years, namely: the evolutionary history of human beings is a long process, the record of civilization is relatively late, and the history of human civilization has limitations in relative statistics.
1. The evolutionary history of mankind is a long process
Because of more than 4 million years of human beings, history was a blank period before that, and humans and primitive apes at that time.
There is no essential difference between animals, so it is not included in the history of human civilization.
2. Civilization records are relatively late:
The reason why there is a 5,000-year-old civilization is also because the civilization records of human writing carriers are relatively late, so the time for the history of civilization is limited.
3. There are limitations in the relative statistics of the history of human civilization
Due to the limitations of human scientific research, some civilizations have not been discovered, and the current written history of civilization is only more than 5,000 years.
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More than 5,000 years, it has been 2 million years since the evolution from primitive man to man, the history is only 5,000 years, a book only has one page with words, and everything else is blank, is that possible? There must have been a major event that destroyed human society, and this makes sense.
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China's 5,000-year history begins with the period of the three great ancestors, not the Qin Dynasty. It's just that the Qin Dynasty created the unification of China and was the beginning of feudal society. People's perception of history is generally said to be the feudal era, and the historical records began to be recorded from this.
History, abbreviated as "history", refers to the systematic recording, research and interpretation of past events and activities in human society, as well as the behavior of these events. History exists objectively, no matter how the scholars write history, history exists in its own way and cannot be changed.
The problem of history is to constantly discover the true past, to use materials to speak, and how people can become discussable issues in reality. History is extended. History is the inheritance, accumulation and expansion of culture, and the trajectory of human civilization.
Broad and narrow sense: Historiography refers to the process of the development of the movement of the objective world, which can be divided into two aspects: natural history and human social history. For example, the history of the universe, the history of the earth, the history of mankind, the history of birds, and so on.
Corresponding to the concept of history, there is also a distinction between broad and narrow senses. Broadly speaking, "history" can refer to all events that have occurred in the past and are not necessarily related to human society.
In general, what is commonly referred to as history refers to the history of human society. History refers to what happened in the past, and history is something that exists objectively.
Literature and history are inseparable, and literature participates in the construction and inheritance of history in its own way, which applies not only to the creation of historical themes, but also to all literary works and literary studies. History is not a little girl to be dressed up, and literature cannot "nothing" history.
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Possibly. Dr. Jiang Zhigang, chief researcher at the Institute of Zoology of the Chinese Academy of Sciences and executive deputy director of the Chinese Scientific Committee on Endangered Species, also believes that from the perspective of nature conservation biology, the earth has entered the sixth mass extinction period since the beginning of the industrial revolution.
I. Information on the Sixth Mass Extinction:
A team of researchers led by Jeremy Thomas of the Centre for Ecology and Hydrology in the UK reported in the recent issue of the journal Science that over the past 40 years, there has been a 54 percent decline in native bird species, 28 fewer native wild plant species and a staggering 71 percent fewer native butterfly species. Insects, which have long been considered to be numerous and resilient, are also beginning to face extinction. Based on this, scientists have deduced that the Earth is facing a sixth mass extinction.
2. The five mass extinctions in history are:
The first mass extinction: It occurred at the end of the Ordovician period, 4.4 billion years ago, when about 85 species went extinct.
The second mass extinction: in the late Devonian period, about 36.5 billion years ago, marine life was devastated.
The third mass extinction: At the end of the Permian period, about 2.5 billion years ago, it was the largest and most severe in the history of the earth, with about 96 species extinct on the earth, including 90 percent of marine life and 70 percent of terrestrial vertebrates.
The fourth mass extinction: 18.5 billion years ago, 80 reptiles became extinct.
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