Life will not live or die in tandem with the earth. When disaster strikes, each will fly away. How long is left for mankind?

I often see questions like this on the Internet: How long will it take for the earth to perish? Will the earth perish? In fact, this kind of question is likely to confuse life with the earth. Both life and the earth have life and death, but the method of death and the life span are completely different.

Everything must die one day, and the earth is no exception.

Because the world is in motion, not static. As long as there is material movement, there will be life and death. But what needs to be clarified about this issue is whether the death of the earth means that the earth no longer exists, or whether it means that the life on earth has died. Some people are always confused about this issue. They confuse the earth with earth creatures or humans. They think that the extinction of humans or creatures means the death of the earth, so they raise questions like this.

But when we answer the question, we must clearly define the essence of the problem. The death of the earth is completely different from the death of all living things on earth, or the death of human beings.

First, let’s talk about the life and death of the earth.

The earth is just a small globe in the solar system, with a mass only one 330,000 times that of the sun. The earth was born with the sun and will die with the sun.

The sun is a yellow dwarf star. After hundreds of years of observation, the scientific community has obtained the spectra and lifespans of stars of various masses. The lifespan of a yellow dwarf star with a mass like the sun is about 10 billion years. Now the sun It is about 4.6 to 5 billion years old. Therefore, the sun will die in about 5 billion years.

The death process of a star like the sun is to first turn into a red giant, with its radius increasing by 200 to 300 times. The earth is 150 million kilometers away from the sun, and the radius of the sun is about 700,000 kilometers. If it is increased by 200 to 300 times, it is 140 to 210 million kilometers. After the sun turns into a red giant, the surface temperature will still be about 3000K. Therefore, the earth is likely to be swallowed up by the hot gas of the sun and vaporized into various particles in the solar atmosphere. Even if it is not eaten, it will be burnt to look like a roasted taro or roasted potato.

The outer material of the solar red giant will eventually gradually spread and dissipate into space, leaving behind a dense celestial body in the core. It is only the size of the Earth, but its mass is more than 200,000 times that of the Earth, and its density reaches 1 to 10 tons/cm^3, this is a white dwarf.

If the earth is not vaporized at this time, there will be only one remnant left. This remnant may still orbit the white dwarf star, but the distance will be further than the original and the rotation speed will be much slower. , and due to the small luminosity and heat of the white dwarf, the earth will become an icy planet close to absolute zero in the dark. This kind of earth is no longer what it is now. Is it considered dead? It's up to the readers to judge for themselves.

Life on earth is far less lucky than the earth, and has long been unable to survive.

In the solar system, no signs of extraterrestrial life have been found, so the earth is still the only planet with life. The reason why the earth has given birth to and reproduced a variety of life forms is due to its unique conditions and too many coincidences. Regarding the process of the birth of the earth and the gestation of life, space-time communication has been discussed in previous articles, so I won’t go into details here.

Research believes that life may have appeared 500 million years before the birth of the earth. Modern scientific excavations have discovered microbial fossils 3.7 billion years ago, which are considered to be the earliest life forms discovered on the earth so far. Life evolved from organic matter to the first cell, so before the formation of this kind of microorganism, life developed dormantly for at least hundreds of millions of years. In this case, it is generally believed that life appeared 4.28 to 4 billion years ago.

The energy of life comes entirely from the sun. Without the sun, life would become extinct immediately. The temperature of the sun is too high, and life cannot survive either. Research shows that the sun, like all stars, will become brighter and brighter as its lifespan increases, which means that the surface temperature will become higher and higher, so the radiation to the earth will become stronger and stronger. Research shows that the sun's luminosity will increase by 1% every 110 million years. After 1 billion years, the sun's luminosity will increase by about 10%, and its radiation will increase by 10~30%.

What will it be like at that time? Under the greenhouse effect of the atmosphere, the temperature of the earth is likely to rise to 100°C, which means that the entire earth is like a pot of boiling water. Most life has long ceased to exist, and the oceans will soon evaporate. , when it really comes to a state of ruin, the earth will become a dry and skeletal planet.

In fact, life may not wait until 1 billion years later, and the earth may soon become uninhabitable.

The global average temperature in 1998 announced by the National Atmospheric and Oceanic Administration of the United States was 16.5°C. In the past 100 years, the greenhouse effect caused by human activities has increased the global average temperature by 0.46°C, and it is still rising this century. rise. Scientific research believes that every 1°C increase in the earth's average temperature will bring catastrophic changes to the global climate and ecology. A 6°C rise is the earth's ecological endurance limit, and reaching this limit will trigger mass extinction of species.

The temperature rise of 3 degrees is a threshold. At this critical point, the climate cannot be controlled, and the global extreme climate and geological plates become extremely disordered. Under this environmental attack, the species chain will only break and collapse. destroy.

Although mankind has taken various measures, such as the "Paris Agreement" signed by nearly 180 countries, it is to control the temperature rise within 2°C by the end of this century. However, countries continue to argue for their own interests and have not achieved the expected control goals. Some scientists believe that with such a trend, the average temperature is likely to rise by more than 3°C by the end of this century.

Therefore, no one can say for sure how long the earth will be suitable for human survival. Well-known mainstream scientists around the world have jointly signed two open letters, warning that humans must change their lifestyles and habits as soon as possible, improve and repair the environment in order to save themselves, and exclaim: There is not much time left.

But how many people are listening and changing now? Have you changed it? Have I changed it? Has he changed it? We can all ask ourselves, maybe we are all justifying ourselves by thinking, "What's the point of doing well by myself?" But if everyone in the world doesn't think this way and starts from themselves, our descendants and the entire human race will be able to survive on the earth for a while longer.

Just because humans have escaped from the earth does not mean that those who did not escape will become extinct.

How long the earth’s ecology can survive, especially how long human beings can survive, is a difficult question to answer. However, this seems to be a multiple-choice question. There are two choices: One is that scientists are trying to improve space capabilities, trying to transform Mars to make it a backup home for mankind, and at the same time gradually immigrate to the outside of the solar system to preserve human blood.

Another item is to change ourselves in our own hands, so that the earth can reduce its burden and regenerate, restore the ecology, and at the same time develop science and technology to make human beings more adaptable to the future earth environment. Including the use of genetic methods and changes in living patterns, this is another topic and will not be discussed here.

Of course, even if the earth becomes uninhabitable and humans leave the earth, it does not mean that all species on the earth will be completely extinct. Because there are still some life forms that are suitable for high temperatures and even without oxygen, they can continue to survive. The earth may continue to evolve organisms that adapt to environmental changes and live a prosperous life.

But these creatures are not intelligent creatures, so except for humans who can escape from the earth with some, the rest can only survive and die with the earth. These creatures will accompany the earth until the earth dies, and they are truly unswerving.

However, I don’t think anyone knows now whether the overall life span of human beings is much shorter than the earth or longer than the earth.

That's it, welcome to discuss, thank you for reading.

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