Ye Ming closed his eyes and was silent for a long time until the phone rang again.

It was Professor Horrien who called again.

"Professor."

"Confirmed ......" call, Professor Hollyon's tone was a bit solemn and indescribable—a bit like pent-up excitement, but more of fear: "It's not experimental. ”

"yes, sure." Ye Ming took a breath lightly, and then slowly raised his eyebrows: "We have at least figured out one thing, that is, in the high-dimensional space, there is information exchange—it is not just used by us. ”

"But ......"

"I'll talk about the rest when I get back." Ye Ming thought for a while and added: "This discovery doesn't need to be disclosed to the outside world for the time being, including Harvard's side - you are familiar with them, you go and say hello." ”

"Hmm."

"Then I still have something to do here, I'll talk about it tomorrow." Ye Ming said and stood up and walked to the door.

The monitor has shown that Director Niu has come to the door.

……

Ten minutes later, Director Niu's brows condensed into a thick Sichuan character.

"Let me summarize first, you see if I understand correctly."

"First of all, detector B, which is located in the four-dimensional space, has not received a signal in the past."

"Yes."

"But today, received."

"Yes."

"And this signal is not sent by us."

"Yes."

"This signal was sent one minute after the end of our experiment."

"Yes."

"So...... This signal, that is, ......" Director Niu took a deep breath: "Sent by an alien civilization?" ”

Ye Ming was silent, and after a moment, he nodded lightly: "If it weren't for the fact that the civilization born on the earth could be called an alien civilization, then it must be." ”

Director Niu immediately asked, "What do you say...... What is the meaning? ”

"Because it may have been issued by a high-dimensional civilization."

Director Niu fell silent. After a long time, he picked up his water cup and walked to the water dispenser.

But until the hot water overflowed, he didn't notice anything.

"!" Director Niu threw away the cup, and the boiling water was scattered on the ground, emitting bursts of white smoke.

"It's okay, someone will clean it later."

"Well, that signal is because of our experiments, right?" Director Niu ignored the burning of his hands and turned to look at Ye Ming, his eyes were full of solemnity.

Ye Ming was silent again for a few seconds.

"In this world, there are not so many coincidences. I'm inclined to believe that it's because our experiments disturbed some kind of space-time and then were observed. ”

Director Niu closed his eyes and clenched his fists with both hands.

Ye Ming also kept clenching his fists.

At this time...... He had mixed feelings.

Nervousness, excitement, excitement, anxiety...... It's all there.

Maybe a little bit of regret.

- Obviously, those civilizations hidden in an unknown space, who do not know a light year away, have noticed because of this experiment—at the very least, it has caused a little reaction.

Ye Ming didn't know if this was a good thing or a bad thing.

All he knows is that humans ...... It's true that because of myself, I walked a little too fast.

- The hierarchy of civilizations appeared half a century ago, and the science fiction writer Kardashev gave a definition of three levels. Subsequently, some science fiction writers made a more detailed division on this basis, and some even opened their minds and gave a definition of a 10-level civilization.

】

But how to put it, these are just "folk" definitions in the world of science fiction, and the scientific community does not recognize them.

The scientific community advocates doing facts, and has no time to fix these things.

However, with the rapid development of human science in the past decade, it has not only achieved controllable nuclear fusion, strong artificial intelligence, and quantum supercomputing in one fell swoop, but also completed artificial gravity, ultra-long-distance communication, crossed wormholes, touched dimensions, crossed the sea of stars, and came into contact with other civilizations......

Then, it becomes of practical significance to define the current "few catties and a few taels" of human civilization.

Therefore, the scientific community, after comprehensively "borrowing" the imagination of those open-minded science fiction authors, as well as the direction of the scientific and technological tree combined with human beings, decided to put aside the long-standing Kardashev civilization level, and thus take the use of dimensions as the most basic principle.

According to this principle, a civilization is in the first level before crossing the wormhole - no matter how big your space city is, no matter how awesome your warship is, no matter how far your probe flies. As long as you don't cross a wormhole, to be exact, the ability to move faster-than-light, then you're honestly staying in a level 1 civilization.

The level 2 civilization is based on the "faster-than-light" and "displacement" as the standard - whether you cross a wormhole or make a curvature engine, it means that you have officially entered an interstellar civilization.

Because faster-than-light displacement is a prerequisite for colonizing another galaxy.

Level 3 civilization is to get rid of energy weapons and the use of dimensions - whether it is over-distance communication or artificial wormholes, these are all abilities that can completely get rid of the shackles of time and space, and make the influence of civilization instantly reach hundreds of millions of light years away.

Level 4 civilization will be a civilization that fully uses dimensional technology, fully understands the entire universe, and can easily carry out material intervention in a certain space.

Level 5 civilization will have a comprehensive understanding of all dimensions of space, and can easily destroy and create other civilizations and even space - in short, omniscient and omnipotent.

According to this classification, human beings ...... Basically, within ten years, the leap from a level 1 civilization to a level 3 civilization has been completed.

……

Director Niu gradually calmed down. He could clearly see that there was something wrong with Ye Ming on the other side.

He knew that this was a burden on Ye Ming's shoulders, and the burden was too heavy.

If it really ...... Because of this experiment, it has led to what some science fiction works say......

——After human beings entered the star civilization, a large number of science fiction works emerged, and many science fiction works said that the reason why human beings are able to nest on the earth and develop slowly is essentially because they are too weak and have not been observed by other powerful alien civilizations.

But as human technology began to blow out, it was observed...... That's sooner or later.

So...... Are humans ready?

In silence, Director Niu took a deep breath, then looked at Ye Ming, smiled, and joked.

"Are we considered Ye Gong a good dragon?"

"It doesn't count." Ye Ming looked at Director Niu, and when he saw the encouragement in the other party's eyes, he knew that Lao Niu was calming his heart.

"Although I regret it a little, it may have caused some civilization to observe this time. But...... This experiment is a must-do. ”

Director Niu nodded heavily: "That's right!" Experimentation is a must! ”

Ye Ming was silent, then stood up and grabbed the confidential phone on the side.

"Now, it's up to us whether we're the pessimistic science fiction writers who say 'kids have mastered the nuclear bomb', or whether we've come to the heights we should be!"