In the eyes of interstellar civilizations, K-class civilizations are not divided, whether they are primitive races or modern civilizations, as long as they do not pass through the big filter, they are called K-class civilizations. Ｘ

However, since the beginning of L-class civilizations, there has been a relatively rough division process.

Removing the S-level civilization that the dragon has no end in sight, the L-level civilization is the real main body of the starry sky......

From the perspective of science and technology, only when the [large-scale fusion reactor] is realized and the [sub-light speed spacecraft of about 5%] is completed, can it be regarded as a means of star-level interstellar navigation and reach a real L1-level civilization.

In the face of Yi Feng's questions, Hei began to proudly sell his knowledge, and whenever this time came, he was especially useful in his heart.

Since he has chosen to join the new human civilization, he has to fulfill his duties, he is not a half-hearted person.

"Captain Yu, the benefits of crossing the big filter naturally don't need to be said. Each L1-level interstellar civilization has achieved a qualitative change in civilization, and can easily crush the vast majority of K-level civilizations. That's fine, right? ”

Yu Yifeng nodded: "What about L2?" The discovery of the dark matter theory is not a difficult task, is it? ”

In his opinion, since humans achieved fusion, they naturally discovered dark matter, which led to the realization of the subsequent curvature engine.

"Yes, that's right, as long as the Hadron Collider is strong enough...... Black nodded, "But not all interstellar civilizations will be crazy to make the Hadron Collider bigger and stronger, so they don't necessarily discover the dark matter ...... soon."

"Moreover, it is also very difficult to explore the curvature bubble, and it takes a long time."

It's right to think about it, human beings have only been exploring curvature bubbles for twenty or thirty years, but they have achieved considerable results.

That's because...... The vast majority of spatial structures are plagiarized from the green light civilization, which can be said to have taken a shortcut!

Without the data obtained from the attack on the Green Light Ship, the development time of the Curvature Engine would have been greatly increased. Yu Yifeng couldn't help but smile, isn't it just a blessing in disguise?

All in all, L2 civilizations are exemplified by the emergence of the "dark matter" theory and the subsequent curvature engine.

The "dark matter" theory, a huge milestone.

Even...... Human beings still can't figure out whether some "dark matter" is a zero-point energy or a power field, and they are still groping for its ultimate nature.

It is also possible that "dark matter" has two properties, just like the wave-particle duality of photons.

The level of civilization is, of course, divided by the milestone of a certain science, not by the difficulty of a certain technology. No matter how simple or difficult this "theory" is, as long as it is discovered and stands on it, the level of civilization will rise by one level.

Of course, if there is a gap in level, the difference in strength is even more different.

Level 1, 5% of the speed of light, up to 10%.

But what about L2? Faster than the speed of light!

"So, what about Level 3? What technology? ”

"Nanotechnology."

"Nanotechnology?" Yu Yifeng wondered.

"Yes, to be precise, 'nano-level manipulation', of course, not at the current superficial level, but to achieve true atomic-level manipulation."

"Including a large number of nanomaterials, nanorobots, and so on."

"This technique requires a deep understanding of the microscopic level of civilization and involves the Casimir effect. I'm sorry, but I don't have this information in my core memory......"

"But I know that through these technologies, it is possible to make certain materials with exaggerated properties, including frictionless materials, and use the Casimir effect to make small uses of vacuum energy and dark energy......"

Black added at the end: "As far as I know, the real controlled nuclear fusion technology is achieved at this stage." ”

Is it a frictionless material...... Is it really possible?

Yu Yifeng paused, feeling a little mysterious in his heart, L3-level technology was already so exaggerated...... In the past theory, it was almost impossible to exist, right?

He asked with some curiosity, "What about L4?" ”

"Genetic dynamics, brain topology, this stage of civilization, can study the initial generation of intelligence, and initially modify life from the genetic level...... A lot of information has been given to you. ”

"In fact, the human brain chip is equivalent to L4 technology...... This technology transcends the level of civilization itself. ”

“…… What about L5? ”

"I don't know ...... either" Black shook his head, and his original civilization stopped at L4.

He said a little solemnly: "Your Excellency Yu Yifeng, I would like to remind you that the division of civilization is very rough. There is almost no end to every line of technology, and even my original L4 civilization still hasn't fully explored the L2 dark energy theory. It doesn't make much sense to be entangled in the level of civilization, and it is impossible for the two sides in contact to inform each other about the level of civilization. ”

"Generally speaking, you can't judge the strength of an opponent's ship by its appearance...... Unless you're actually at war with the other side! ”

"There will always be so many strange things in the universe, just like the green light civilization, won't it beat the more powerful destroyer civilization?"

"Vigilance, humility, friendliness, and distance are the rules of survival among interstellar civilizations!"

Yu Yifeng was silent for a while, this was more useful information: "What do you think of our civilization?" l2…… Or L4? ”

Hei thought for a moment: "Theoretically speaking, our L2, L3, and L4 theories have all scratched the surface, and all disciplines are developing side by side, and this phenomenon is very rare. So I dare say that we didn't have much of a bottleneck before L4. ”

"But in terms of industrial strength and combat effectiveness, we are probably in the lower reaches of the L2 level, which is more powerful than the L1 that has just entered the interstellar world, but not as good as the old L2 civilization."

"There are too few of our ships, and if Deep Space is destroyed, there will be nothing. Captain Yu ...... It's better to hurry up and build ships! ”

In the face of Hei's loud appeal, Yu Yifeng also had some intentions in his heart, and he planned to supervise the industrial problem.

Outside the Deep Space, there are thousands of small spaceships on board, and there is no problem at all.

The development of large-scale weapons must also be carried out as soon as possible.

In the end, he asked a little unwillingly, "...... Is there really no other technology in your core memory? ”

The black hand spread out and said with some regret: "I'm sorry, it's really gone, my core memory is incomplete......"

"In fact, these seemingly epoch-making scientific papers are our basic popularization courses."

"Just like the new human civilization, which has popularized the theory of relativity and calculus in higher education, my previous civilization has also popularized more advanced knowledge, so I can ...... it."

"I've just scratched the surface and can barely remember. As for superconducting material technology, it was my thesis in higher education...... Isn't that good......" Hei said triumphantly.

Yu Yifeng was secretly stunned when he heard it, the popularization of people's basic knowledge has given such a great inspiration to human beings, and he is really drunk.

He thought for a while, realized that he had finished asking the question, and waved his hand to indicate that he had nothing else to ask.

Hei also nodded towards Yu Yifeng and politely said goodbye......

"It seems that this black is indeed standing on the standpoint of human beings at present...... It still makes sense that it didn't break the contract and kill it in the first place. ”

After seeing him go, Yu Yifeng savored the cosmic information given by Hei.

Human beings are still not strong, and L4, L5 and the like are too far away. The high-level scientific papers that make mankind ecstatic are just some knowledge popularization......

The gap between civilizations and civilizations is really huge.

But if you think about it, there is some truth to this statement. If a normal college student is allowed to travel back in time to the Newton era, the knowledge he has is enough to scare the scientists of that time to death!

Even this college student didn't need to know very much, just a little calculus, chemistry or biology could inspire the scientists of the time!

Let's put it this way, as long as this college student can memorize "hydrogen, helium, lithium, beryllium, boron......", or can calculate the simplest calculus. This group of scientific elites, naturally, will be subjected to a huge atmosphere and continue along this path, and then it will be none of the college students' business.

Creating knowledge is always more difficult than learning knowledge, and it is even more difficult to open up a big road.

There is still a lot to explore in the theory of dark matter discovered by human beings themselves......

And the genetic dynamics and brain topology given by black are even more vast, just equivalent to the framework. Human beings have also groped for an edge, gained a lot, and even invented such epoch-making things as brain chips......

Black has made a good start for humans, and the content behind it has to be slowly filled in by humans themselves.

In this way, the gap between interstellar civilizations is indeed very large.

It's a long road...... Thinking of the behemoths that had existed for millions or hundreds of millions of years, Yu Yifeng couldn't imagine what they had developed into at all.

Of course, the road still has to be taken step by step.

At this moment, although human beings are not the strongest civilization in the galaxy, they are already a rare interstellar civilization, and Yu Yifeng will definitely not blindly worry about the sky.

So many low-level civilizations are still living well, not to mention the new human civilization...... r