After looking at the surrounding environment, under the dim tone, the main building of the temple-like academy revealed a simple and desolate atmosphere, as if a wise man came from the end of time, silently staring at the starry sky overhead.

Looking around, apart from the main building, there are only two or three buildings that do not know whether the altar or any other purpose is quietly located there. Looking at it from a distance, beyond the iron trestle fence, the environment outside the academy is not overly decorated, except for a circle of unknown trees around the academy.

The whole academy is filled with a quiet and mysterious atmosphere, just like the concept of death, an inevitable thing in life, but always covered with a hazy veil, which makes people unable to see through.

Today's Dead Song Academy is a little different, starting from the academy gate, a red carpet stretches out and reaches the temple.

Li Rui glanced at the red carpet under his feet, and then looked at Karl, the god of death, who was waiting there.

Noticing that Li Rui's gaze finally looked at him, Carl still maintained that smile and made a gesture of please.

"Carl, when did you care about these empty etiquettes, didn't you always ask questions when you had them?" Li Rui said surgingly, with a hint of ridicule in his eyes.

A hint of surprise flashed in Carl's eyes, although he didn't understand what Li Rui meant, he still replied, "Time always changes something, doesn't it." ”

"Yes." Li Rui nodded undeniably and motioned to Karl to lead the way: "Then let's go." ”

The two stepped on the red carpet all the way up the stairs, and soon came to the front of the temple. Walking all the way in, the only ornament Li Rui saw was the portrait of Liang Bing or the Apocalypse King.

Tens of thousands of years of lonely life, nothing but knowledge. It has to be said that Carl is a pure scholar. Replaced by Li Rui, he felt that he must not be able to stand it, people are emotional animals, they are born with social attributes, and after tens of thousands of years of loneliness, there will be some problems in their brains. So he found a lot of ties for himself, Donglong, Earth, Alliance, and ...... Qi Lin.

Carl, on the other hand, devotes everything to academic research and does not want anything else. Even Liang Bing, the former white moonlight, has been crushed into countless books in tens of thousands of years of academic research, and then abandoned mercilessly.

So for Carl, it didn't matter what the decoration was. And what was used to entertain Li Rui was just a sofa, and there was not even a sip of water in addition to that.

Carl sat opposite Li Rui, his hands on his knees kept moving slightly, and he looked a little restless. But in fact, he couldn't hold back the excitement in his heart, and he didn't know how to open his mouth for a while.

Li Rui was not in a hurry, supporting his chin with one hand and a cane in the other, just leaning on the sofa and waiting for Carl to speak.

Finally, Carl seemed to be brewing.

"Well, okay." Karl pursed his lips, "I'll just say it." ”

Li Rui raised his hand and signaled him to be casual.

"How much do you know about the Void?" Carl asked.

A hint of surprise flashed on Li Rui's face, and his gaze stopped on Carl for a moment before nodding and admitting: "At first, my understanding of the Void was only to know that there was such a concept, and then I learned something from the Tianji King Hexi. It's a pity that the angels don't know much about this and don't help much. It wasn't that long ago that through some, some ways beyond the conventional, it was a real touch that was lost and more still in the stage of speculation, so I wanted to hear your opinion first. ”

"That is, you believe in the void to exist?" Carl asked.

"Hmm." Li Rui did not deny it, but also pointed out the differences: "Of course, there may be a slight difference between what I know and what you understand. ”

The smile on Karl's face became even brighter: "To admit the existence of the Void, you have surpassed ninety-nine percent of the life in the known universe.

As for the difference in cognitive styles, it doesn't seem to me to be a problem, and it doesn't affect our communication.

For example, my teacher and I have different attitudes towards the void, I choose to accept and take the initiative to welcome the arrival of the void era, while the teacher chooses the most violent way - confrontation, for which the teacher has created three god-making projects. ”

Li Rui bowed slightly, indicating that he understood.

"To understand the void, we need to look back at an untold history." Carl had a look of memory on his face, and his deep gaze seemed to penetrate the long river of time, returning to that time more than 10,000 years ago.

"Thirty thousand years ago, Dinghei, the chief scientist of the Kamigawa civilization, built the first celestial-level supercomputer ever built in the known universe.

Celestial-level supercomputing is used to collect dark data and understand changes in the universe, including but not limited to the development of various civilizations, the activities of celestial bodies, changes in energy, and so on.

In this way, the Kamigawa civilization wants to increase its understanding of the universe and make better use of it. In order to collect more data, the Kamigawa civilization spent tens of thousands of years building the Great Worm Bridge system, that is, the data collection terminal of the large clock.

In the process, the Kamigawa civilization encountered many civilizations, including the angel civilization. ”

Speaking of this, Karl slowed down for a moment, and his expression became solemn: "But with the gradual improvement of the Great Insect Bridge system, the Kamigawa civilization has more and more understanding of the universe, and the scope of the known universe is also constantly expanding. ”

In fact, the definition of the known universe and the unknown universe is very simple, that is, the range that people can observe, within this range is the known universe, and correspondingly outside this range is the unknown universe.

It's like a human being, using a spectrum of cosmic rays to observe the universe, but there is also a scope. Before Li Rui's help, the limit of what humans could observe was 93 billion light years, and this range was the known universe for humans.

And for the space civilization, and even the god-making civilization, a super civilization whose scientific and technological means far surpass that of the earth, their known cosmic range is naturally not comparable to this mere 93 billion light years.

And with the footsteps of the Kamigawa civilization, the growth rate of the known universe can be imagined.

"But as the known universe continues to expand, there are anomalies in the data fed back by the large clock system." Carl said.

"What kind of anomaly?" Li Rui asked.

Carl took a deep breath: "Now we know that celestial-level supercomputers are still reading dark data. Dark data, on the other hand, is based on dark matter, which is the main substance that makes up the universe, and its mass accounts for more than 70% of the universe.

Theoretically, wherever dark matter exists, dark data will be generated. ”

"But when the Kamigawa civilization explored at the beginning, it found that when the scope of exploration expanded to a certain extent, the dark information fed back became very strange."

"Strange? What's so strange? Li Rui raised his eyebrows, which he really didn't know.

Dinghei in the parallel universe didn't tell him about this experience, perhaps because of his intervention, which made Dinghei's research progress a little faster. Therefore, Li Rui didn't know what was going on with the original Kamigawa civilization in the main universe.

However, Li Rui had a hunch that he seemed to be extremely close to the truth about the collapse of the Kamigawa civilization.

"The dark messages fed back have become unreadable. These dark messages are in an uncertain state, not only is the data observed different every time, but even the data that has been stored will have different results every time it is read. ”

Li Rui was directly stunned, there was such a thing?

"What does this mean?" Li Rui asked.

"I don't know, there was a lack of necessary data, so no one could figure out what was going on at the time." Karl shook his head, and his tone suddenly became low: "But such a discovery has caused a great uproar in the scientific community of the Kamigawa civilization, and even driven some scholars who are at the forefront crazy. ”

Li Rui's face was grim, he knew that it must be the impact of certain concepts that made these scholars change like this.

"We know that there is a theoretical limit to the observation of the universe through radiation, which is 13.8 billion light-years. According to the Big Bang theory, the universe was born 13.8 billion years ago, which means that this is the limit of time allowed for the speed of light to travel.

However, by observing the dark information generated by the changes in dark matter, we have broken through the limitations of space, and theoretically we can observe infinity as long as dark matter exists. ”

"However, the Kamigawa civilization has observed a certain 'limit' of the universe. So, is this the boundary of the universe? ”

Boundary?

Li Rui frowned, remembering the phenomenon he had observed on the imaginary timeline while traveling through time and space.

"Since there is some limit to the feedback of dark information, is there no dark matter outside of this limit? But why is this phenomenon of indefinite state occurring? Does this mean that dark matter is still expanding with the expansion of the universe, which is what leads to instability? Or have we really touched the boundaries of the universe? So what's beyond the borders? What is it that makes up the boundary? ”

Karl sighed and said, "Under the impact of such a series of questions, many top scholars of the Kamigawa civilization have explored an answer in various ways, but in the end they have lost their minds by one subversive concept after another. ”

"As you can imagine, it must have been a wonderful but crazy time." Li Rui sighed.

"Crazy?" Carl glanced at him, then nodded in agreement: "Crazy indeed. ”

"In order to find out the truth, Principal Dinghei made a bold experiment." At this, a look of admiration appeared on Carl's face: "He decided to simulate the state of the lake that we have detected. ”

"I don't know what the exact process of the experiment will be, and I was not qualified to participate at that time. The experiment was carried out only by the teacher and Principal Dinghei, but the results of the experiment were known to the entire universe. ”

"That experiment ......" Carl paused, "ruined the Kamigawa civilization......"