At the end of the twentieth century, Aurora successively overcame various difficulties in technologies such as superconductors at room temperature, wireless energy transmission, and controlled nuclear fusion.

So overnight, the entire Aurora society ushered in an unprecedented energy revolution.

In the years that followed, the brilliance of nuclear fusion greatly promoted the development and innovation of Aurora in many fields such as basic physics, engineering, materials science, and semiconductors.

As a result, various high-tech technologies such as fusion energy aero engines, non-working fluid propulsion engines, graphene chips, 6G communication networks, practical quantum computers, cheap anti-tumor drugs, and brain-computer interfaces have also been gradually developed.

The widespread use of these new things and technologies has completely revolutionized the social system of the entire Aurora Kingdom, and has also brought the dawn of a new era.

Therefore, in the following decades, Aurora has also completed many comprehensive upgrades of the entire industrial chain.

At the same time, during this time, fusion energy, an extremely cheap, sustainable, and large-scale clean energy, has also been comprehensively promoted by the Aurora State, which has gradually toppled the fossil fuel energy system based on limited resources such as oil, coal, and natural gas on a global scale.

In the whole process of the collapse of the old system and the establishment of the new system, the whole world is inevitably filled with a strong smell of gunpowder and a 'labor pain' overflowing with blood.

Because as the core of civilization, the change of the energy system will inevitably involve the world's highest 'right to speak' or ...... The change of the sole hegemon.

Therefore, during this period, the huge old economic system that relied on the fossil energy system around the world, and the various countries built around it, inevitably had many high-intensity disputes with the Aurora State involving all levels of society.

There are disputes in the industrial field, disputes in the economic field, disputes in the cultural field, disputes in the aerospace field, and disputes in the field of ethnicity and beliefs.

There are even fierce disputes over ideology and social systems, as well as the most direct and brutal hot wars in the air, space, earth, and sea fields.

After a great price and a large number of casualties, the end result was the disintegration of the old overlord and its many vassal states.

The Aurora Kingdom, on the other hand, stands on the 'remains' of many giants in the old era and has established the United Earth Mansion, or the Earth Civilization Alliance, which is mainly based on itself and supplemented by various countries around the world.

However, at the beginning of the 21st century and towards the middle of the 21st century, extreme weather events such as sudden rise and fall in temperature, rapid increase and decrease in precipitation, heavy rain, floods, droughts, and storms suddenly occurred around the world.

The frequent occurrence of these extreme weather events has had an extremely serious impact on the world's economy, transportation, agriculture, industrial and social development, as well as people's daily lives.

Especially after the growth of crops in the world has been seriously affected, it has directly led to a great reduction in global food production, which has led to food shortages and even regional famines around the world.

Although it did not reach the situation of 'great hunger and cannibalism' at the end of the ancient feudal society, there were also a lot of human tragedies.

Before human society could take a breath, there was a large-scale migration of plant species around the world, as well as the degradation of nature's regulatory forces, as well as the loss of a large amount of biodiversity in various natural regions, and even the inexplicable imbalance and complete collapse of the entire natural ecosystem.

As the saying goes, where there is a great disaster, there must be a great epidemic.

The combined effects of severe climate anomalies and ecosystem collapse have dramatically altered the transmission patterns of many diseases in nature.

Even many pathogens themselves have a variety of unknown mutations, which in turn have caused great harm to the health and life of the entire human society.

As a result, in the entire two decades since the establishment of the Alliance of Earth Civilizations, the mortality rate of the global population has remained high.

In particular, the mortality rate of middle-aged and elderly people is reaching new highs every year.

On the contrary, the birth rate of newborn babies is plummeting every year.

What's worse is that a number of scientists engaged in human genome cracking and research projects in the Supreme Academy of Sciences of the Alliance of Earth Civilizations have found that the palindromic sequence, the most important gene loss mitigation mechanism in the Y chromosome of human cells, has inexplicably lost its effectiveness.

This means that the Y chromosome, which has no homologous recombination ability, will continue to lose its own genes in the process of reproduction and genetic replication in each generation, and it will not be able to alleviate it at all, and will eventually only become smaller and smaller or even disappear completely.

Filled with horror and unease, the scientists then compared the genetic status of newborns born each year since the establishment of the Earth Alliance.

After a lot of data research and comparison, they were shocked to find that the generational "shrinkage" of the Y chromosome, or the rate of intergenerational "shrinkage", is continuing to accelerate for no reason.

Then, after compiling a large amount of relevant data and exhaustive calculations and simulations, the panicked scientists came to a conclusion that made them themselves speechless:

If twenty-five years were to be used for one generation, it would take only two centuries and eight generations for the Y chromosome to disappear completely in all human cells.

Although the only important factors that determine whether a human is male or not are the key genes such as SRY and SOX9 on the Y chromosome, the rest of the chromosome exists only to stabilize the chromosome structure.

Therefore, theoretically speaking, it is completely possible to transfer all these key genes into the X chromosome structure, and it will not delay the expression and presentation of genes.

But theory, after all, is just theory.

It's too hard to achieve this effect.

In the past two hundred years, the Earth Alliance has not been able to develop a strong enough gene editing technology to ensure the safe transfer of all male key sex genes on different chromosomes on the whole planet, as well as the subsequent perfect splicing, as well as the expression of the most important genetic traits.

Then, in two hundred years, unless all human beings on the earth can suddenly evolve into parthenogenetic species, or human beings find other new ways to reproduce, the human beings on earth will inevitably ...... Extinction.

With a heavy heart, the scientists jointly submitted this thick research report to many high-level officials of the Earth Alliance.

The high-level officials, who were already physically and mentally exhausted by the many affairs and various problems inside and outside the alliance and on the earth, were immediately dizzy and frightened by this research report from the Supreme Academy of Sciences.

Y chromosome disappearing? Two hundred years?

Is this a sci-fi movie?

What...... Is there so much disaster for mankind?!

They hurriedly began to organize high-end scientific conferences, inviting a large number of top scholars and even unrelated experts in various fields to discuss specific solutions or reliable solutions to this serious problem.

Unfortunately, after many meetings and discussions, everyone found ...... There is no concrete solution to be found, and there is no reliable idea.

Because with the current level of technology of the Earth Alliance, there is basically no particularly effective and safe way to solve this problem.

At the same time, a number of astronomers and astrophysicists, who are also members of the Supreme Academy of Sciences, also reported a major discovery to the top of the alliance.

This discovery is:

After compiling a large number of observations and exhaustive simulations, many scientists have determined that the sun's core has begun to age rapidly for unknown reasons.

In other words, the sun shining on humanity should have experienced transient runaway thermonuclear fusion in billions of years before the red giant stage...... That is, helium flash, which is about to be staged in advance.

The so-called helium flash is a sign that a star has entered aging, and it is also its last glory in the main sequence stage.

Essentially, the hydrogen in the inner core of the star burns out, and then helium, which is heavier than hydrogen, falls into the core of the sun under the influence of gravity, replacing it with hydrogen.

At the same time, the nuclear accumulation of helium is far more intense than that of hydrogen, and the energy released is also larger.

In order to maintain the balance between gravity and pressure, the volume of the sun expands rapidly.

After a helium flash, the Sun's surface is more active, releasing more intense radiation.

On top of that, the skyrocketing sun could even engulf the entire Earth's orbit.

As for the civilization of the earth and all mankind in the midst of this...... It may evaporate in a short time.

At the same time, other scholars of the Supreme Academy of Sciences also pointed out that after synthesizing a large number of data, including data on changes in the human Y chromosome, data on changes in the magnetic field inside and outside the earth, changes in the sun's magnetic field, and changes in the frequency of the sun's rays.

They speculate that all the disasters that have occurred on Earth in the past two decades, including the abnormalities of the human Y chromosome, are most likely related to the rapid aging of the core of the scorching sun hundreds of millions of kilometers.

In other words, it was the sun, which had quietly undergone a drastic change, that caused all this due to its abnormal stellar magnetic field and light radiation.

……

"What happened to the civilization of the earth in the last era, it feels ...... It's very similar to the backstory of the movie "The Wandering Earth".

Although the Chinese country in the movie is indeed not as strong as the Aurora country, it can actually unify the world.

Hmm, then these Aurora humans must have gone through some events before they became hungry gods.

Otherwise, with their kind of technological level, which is 108,000 miles behind the most basic interstellar civilization, no matter how much they toss, it is impossible to solve this kind of civilization disaster involving the internal changes of the sun. ”

Mu Cang 'flipped through' the information sea of all the memories of the Hungry God Clan, and thought leisurely, "But...... In the middle of the 21st century, the world's unification was largely completed...... That's a bit too fast. ”

This made him suddenly recall an anime work he had watched in his previous life...... "Leap to the Peak".

Mu Cang's deepest impression of that anime is that in its plot setting, the human civilization on earth was able to master the faster-than-light spacecraft technology at the beginning of the 21st century.

It's outrageous.

By the way, in these vast amounts of information, Mu Cang has already confirmed that the Hungry God Clan was born before the birth of this universe, the Milky Way Orion Spiral Arm Solar System Earth Human Civilization in the last cosmic era.

From now, I don't know if hundreds of billions or trillions of years or even longer have passed.

"Well, after all, it is the earth civilization of the previous era, and it is very different in nature from parallel time and space, so no matter what happens, it is possible."

Mu Cang, who was as huge as a giant in the universe, sat steadily in the boundless void, thinking quietly, "But...... Why did the same civilization of the earth appear in the last era? And culture, ethnicity, history, and even various entertainment elements...... Movies, anime, games, and music are all so similar or even the same, why is that? Could it be ...... Poincarat returns? ”

The so-called Poincarat regression or Ponta regression is essentially a mathematical theorem, not a physical law that needs to be verified.

As far as the Poingaren regression theorem itself is concerned, it has little to do with whether the universe can be reproduced or not.

An important reason for their connection is that certain physical laws and rules of the objectively realistic universe happen to meet the conditions for the establishment of Poincar's regression theorem.

However, there are similarities in the field of physics, and it is also known as 'Poincaré'.

That is, a finite and closed isolated material movement system that is not affected by external forces will inevitably move in a cyclical manner.

This is called the "Beginning State Recurrence Theorem", which can also be called the Poincarat regression theory.

In addition, there are predictions of phenomena similar to Poincaren's regression in M theory:

Theory M holds that the universe can emerge spontaneously from nothingness in its entirety.

Even if the universe maintains its current tendency to cool and thin indefinitely, all baryonic matter diluted to the point where it falls into a black hole is transformed into Hawking radiation.

In the incomparably distant future space, which is close to the quantum vacuum, a quantum-scale universe can once again emerge at random and skyrocket into a new universe.

And M theory suggests that this emergence, which can occur at any time.

At the same time, in a given finite universe, the combination of matter, energy, and information is limited.

Then, according to the previous conclusions, and then applying the speculation of the Ponta regression phenomenon, then a new summary conclusion can be introduced:

That is, if the real universe in which Mu Cang is located follows the M theory and the theorem of the recurrence of the beginning state, then it can occur, and any number of Ponta regressions occur.

And after a sufficient number of occurrences, the speed of light in the universe can be the same, the chemical bonds can be re-established according to the distance between atoms, and the Milky Way can also reappear, and human civilization can ...... The same can be born again.