When the time came to half past eleven o'clock in the night, there were slowly fewer people visiting the dog's head gold.

Kotou Jin was taken away by a large number of engineering mechs, and the controllers of the more than fifteen million humanoid sirens also left.

The fifteen million humanoid robots automatically flew back to the five humanoid robots base on the moon.

On the way back to the apartment from the collision building, Su Zhe and Fan Xiaoming chatted while walking.

"300,000 tons of gold, sounds like a lot, and it looks that big." Fan Xiaoming said with a smile, "But for sure, we are not worried about the lack of gold for a long time." ”

300,000 tons of gold sounds like a lot, but it's actually 15,000 cubic meters, which is the size of two swimming pools.

After the dog's head gold was dug up, it was actually a big lump.

Su Zhe nodded and said, "300,000 tons of gold is enough for a long time." ”

"Yes!" Fan Xiaoming smiled, "I proposed the construction of a rare element manufacturing accelerator with the relevant departments, and the reply to me was that a seminar would be organized tomorrow, saying that we would discuss the details of the implementation of this plan." ”

"What about agreeing to build a rare element manufacturing accelerator?" Su Zhe said with a smile.

"Can I disagree, with the development of the solar system, the demand for rare elements is increasing, and it is not enough to rely on mining, not to mention that the rare elements in the solar system are a fixed number." Fan Xiaoming said.

For the solar system, the storage of those rare elements is already small, even if all the rare elements in the solar system are mined, it is not enough.

Su Zhe nodded and said: "According to the existing theory, there are very few rare elements in the solar system, otherwise they would not be called rare elements. ”

After the completion of the Sanmen project, many probes were launched on celestial bodies in the solar system.

According to the data fed back by these probes, the elements that are rare elements on Earth are also rare elements for the entire solar system.

The characteristic of these rare elements is that they do not form extra-large mineral deposits, and the refining process is also very troublesome.

As for the ko's head found on the moon, this is only a special case.

The solar system as a whole is inefficient at mining rare elements.

In his opinion, it is not as efficient as using accelerators to produce rare elements.

Fan Xiaoming said with a smile: "I also think so, as long as the sun exists, we will continue to produce rare elements through accelerators." ”

Fan Xiaoming nodded and said, "Even if the sun is blown up, as long as we have enough energy, we can also produce rare elements in a steady stream." ”

"That's what you said." Su Zhe smiled, "With the development of science and technology, it is true that human beings do not need to rely on the sun for survival, but at this stage, we must still rely on the sun, after all, our science and technology have not developed to that extent." ”

"We've got that." Fan Xiaoming said seriously, "But now the conditions are not ripe, the root cause is the problem of energy, according to the current research, as long as we achieve controlled nuclear fusion technology, then we can get rid of the sun, to be precise, get rid of the stars to live in space." ”

With the realization of controlled nuclear fusion technology, human beings can obtain a steady stream of energy.

With a steady stream of energy, the ecosystem built by humans can be maintained for a long time.

At that time, humanity will be able to get rid of the stars.

Su Zhe nodded and said with a smile: "Energy is the core, and now we still have to rely on the energy provided by the stars to survive, speaking of which, human beings are very fragile." ”

"Yes, it's too fragile." Fan Xiaoming nodded, "Many posts on the Internet write that after 1.5 billion years, after the sun's hydrogen is burned out, it will begin to burn helium, saying that the sun's brightness has increased and is unstable, and it is the end of the earth's human beings at that time, I think it's funny, 1.5 billion years, if human beings don't develop science and technology, human beings won't live to run out of the sun's hydrogen, these people think too beautifully." ”

In his opinion, without taking the initiative to change the earth's environment, human beings on the earth will not live to be 1.5 billion years from now.

Actually, it's easy to explain.

For human beings, the suitable living environment is very harsh.

Its temperature, air pressure, humidity, air composition ratio, etc., as long as a factor has changed significantly, the earth's environment is not suitable for human survival, and human beings will disappear from the earth.

For example, global warming, which is often mentioned now.

This is the overall increase in global temperatures.

For the current Earth, once the Earth's temperature continues to rise, it will bring about a chain reaction.

Glaciers at the poles are decreasing, sea levels are rising, and so on.

A series of reactions will disrupt the existing Earth's ecosystem.

At this time, the mass extinction of species on Earth began.

If species are adaptable, they are likely to survive, and those species that do not adapt to the current planetary environment will become extinct.

This is not alarmist, mass extinctions have occurred five times in the history of the planet.

It is also said that the sixth mass extinction has begun, saying that the rate of mass extinction is now greatly increasing.

The reason for the extinction of matter is that the environment in which the species lives has changed.

According to current research, after mankind realizes controlled nuclear fusion technology, there will be a steady stream of energy.

With these energy sources, humans are able to sustain the ecosystems that have been built.

At the heart of an ecosystem is energy.

Su Zhe nodded seriously and said: "As far as a year ago, according to that trend, the earth's environment will change greatly due to the excessive development of human beings, and human beings will be wiped out in their own hands in advance, but then again, even if human beings do not develop and live like monkeys, their human beings will not have long to live on the earth, just like those creatures that disappeared due to the five mass extinctions of life on the earth before, in the final analysis, the earth's environment is constantly changing, In each of these states, the environmental stabilization period is not excessively long. ”

Actually, it's easy to understand.

The Earth's environment is constantly changing.

From a human point of view, the Earth's environment is changing very, very slowly.

However, from the perspective of the earth, that is, the time is extended, and the earth's environment is changing rapidly.

The reason for the five mass extinctions of life on earth is that the earth's environment has undergone major changes.

Fan Xiaoming agreed: "If human beings do not take the initiative to interfere with the earth's environment and continue to develop according to the trend of a year ago, it would be good for human beings to stay on the earth for three or four thousand years, even if we live like monkeys, we will live for hundreds of thousands of years." ”

He didn't mean to be foolish.

In the past six months, there has been a significant increase in research projects on the earth itself.

Coupled with the improvement of relevant technical means, the study of the earth itself has become more in-depth, and the core data it has mastered shows that.

Since the Industrial Revolution, the earth's environment has changed rapidly, especially the use of fossil fuels, which has led to an increasing proportion of carbon dioxide on the planet.

When the proportion of carbon dioxide in the air increases, it will have a chain reaction that can cause devastating damage to the Earth's biosphere.

According to the data collected from these data, the development trend of the past will continue, and in 3,500 years, the earth's environment will no longer be suitable for human existence.

Three thousand five hundred years!

In other words, if humans had not paid attention to the changes in the earth's environment one year ago, humans would have disappeared from the earth in 3,500 years.

It's the real disappearance, the kind that doesn't leave behind.

In addition, the model established by using the analysis of the collected earth data shows that if human beings had not produced the industrial revolution, human beings would still have lived a life of farming, animal husbandry and fishing, and human beings would still be able to live on the earth for 500,000 years.

At that time, the earth's environment was no longer suitable for human existence.

According to the analysis of the data, it is known that the warming of the earth is a megatrend, and its industrial revolution, using fossil fuels, which only slows down the global warming of the earth.

However, the use of fossil fuels or not plays a significant role in environmental change.

Fossil fuels are used.

After 3,500 years, the earth's environment will no longer be suitable for human existence.

Without the use of fossil fuels, humans can still survive on Earth for half a million years.

Eventually, humanity will disappear from the face of the earth, but the time gap between the two is huge.

One is 3,500 years and the other is 500,000 years, and when the two are compared, the former is one-hundredth of the latter.

One can imagine how big the gap is in the use of fossil fuels.

In addition to these two cases, there is also the fact that humans live the same life as monkeys.

In this case, two million years from now, the Earth's environment will not be suitable for human existence.

From the comparison between these three, we can see that the emergence of human beings has played a great role in the changes in the global environment.

At the same time, it also shows that as long as science and technology do not develop to a certain extent, human beings cannot get rid of the fate of extinction.

Of course, this was before.

But after the completion of the Sanmen Project and the entry of mankind into the space age, human beings have the ability to change the environment of the earth.

According to current science and technology, there is an 80 percent certainty that human beings will survive on Earth until the sun's hydrogen is burned out.

In other words, human beings can survive on the earth for 1.5 billion years.

The reason why I say this is because there is now such a technology that can comprehensively regulate the global environment.

With current science and technology, even if the earth's environment is no longer suitable for human existence, human beings can break away from the earth and survive in the space of the solar system outside the earth.

However, this is only a change in the earth's environment, if the general environment of the solar system changes significantly.

For example, the sun has become extremely unstable.

With current science and technology, if the earth is no longer suitable for human life, human beings will come to the solar system outside the earth.

At this time, with the energy provided by the sun, the ecosystem built by human beings can be maintained for a long time, and human energy can be reproduced.

If something happens to the sun, then it will be time for humanity to perish.

In general, humans are really vulnerable.

From the earth's environment to the general environment of the solar system, and even the cosmic space outside the solar system, as long as there is a major change in that one, it is possible that the collective annihilation of mankind will be caused.

This is the cruelty of the universe.

In order to survive, human beings can only develop science and technology.

With the development of science and technology, human beings can cope with various environmental changes.

Su Zhe nodded and said, "Yes!" Fortunately, we have entered the space age, and we have more means to regulate the earth's environment, which is a little unreal when you think about it for 3,500 years. ”

After the results of the 3,500-year-old study came out, it frightened many people.

For this result, those who believe and those who do not believe are half to half.

Such results are really scary.

After 3,500 years, the earth's environment is no longer suitable for human existence, and human beings will disappear from the earth.

Most crucially, it is humanity itself that hastened the process of human demise.

"Yes!" Fan Xiaoming said, "But looking back, if there was no industrial revolution, human beings would not have used fossil fuels, human beings would not have come to this point, and human beings would not have entered the space age. ”

In his view, the industrial revolution of mankind, the use of fossil fuels, and the development of science and technology are all right.

Although the development of these things, humanity will be closer and closer to the day of extinction, and the existence of human beings without development may be a little longer.

But the former has a glimmer of life compared to the latter.

Even if you don't grasp this glimmer of life, both humans will perish, the difference is only the length of time they exist.

The root of human needs is survival.

Only development can survive, otherwise we will only face destruction.

The former has a glimmer of life, the latter is an absolute demise, the difference is that the former dies quickly, and the latter drags on for a longer time.

Let him choose, and he will only choose the former.

It is only the right thing to do is to develop science and technology.

For example, now, human beings have chosen to develop by coincidence, although they are indeed cheating themselves in the early stage.

Its development has accelerated the changes in the earth's environment, so that after 3,000 years, the earth is no longer suitable for human existence.

If humanity is unlucky and human science and technology cannot get rid of the earth, then humanity will perish in 3,500 years.

Now, it is good luck for mankind that it has been able to enter the sky on a large scale after being freed from the shackles of the earth.

And human beings have the ability to control the earth's environment,

In other words, whether or not humanity will die now depends not on changes in the earth's environment, but on changes in the environment of the solar system.

Humanity has come out of the Earth and has begun to set foot in the extraterrestrial solar system.

For today's human beings, as long as the sun can be stable and there are no drastic changes, human beings can live until the sun goes out.

In general, while human beings are developing science and technology, they are actually cheating themselves and accelerating the changes in the earth's environment.

If the Earth's environment becomes no longer suitable for human existence, the end of humanity has come.

Judging by the current results, humanity is lucky.

Originally, human beings only had 3,500 years to live, but after the breakthrough, the time of human existence was greatly improved.

According to the current science and technology of mankind, as long as the sun is not extinguished, human beings can survive.