Xiao Yu has also carried out some research work on four-dimensional space before, and has also made some assumptions about four-dimensional space.

There is a pattern to the increase in dimensions that can be followed. It is mainly divided into two points, the first point is the complete visibility of the low-dimensional space to the high-dimensional space, and the second point is the unstoppability of the low-dimensional space to the high-dimensional space.

To put it simply, suppose a piece of paper is a two-dimensional shijie. Draw a circle on this piece of paper, then the inside of the circle is closed for the two-dimensional creatures, and the two-dimensional creatures cannot see the inside of the circle. But when you are in a three-dimensional shijie, you have to see the inside of the circle, and there is naturally no obstacle. This is how the two-dimensional shijie is fully visible in the three-dimensional shijie. There are no secrets in two-dimensional shijie in three-dimensional shijie. Correspondingly, Xiao Yu speculated that the three-dimensional shijie is also completely visible to the four-dimensional shijie.

Unstoppable, you can still use this two-dimensional shijie circle as an analogy. Let's say this circle is a castle of the two-dimensional shijie, which is unusually strong and indestructible, and two-dimensional creatures outside the circle cannot enter the circle anyway. But it's different for three-dimensional creatures, which can easily enter the circle through the dimension of "high", which does not exist in two-dimensional shijie. In other words, in the two-dimensional shijie, no matter how strong the shell of an object is, it cannot block the entry of three-dimensional creatures. Similarly, no matter how strong the shell of a three-dimensional shijie object is, it cannot block the entry of four-dimensional creatures.

This is a simple explanation of the two characteristics of "fully visible" and "unstoppable".

Xiao Yu had already thought of these two points a long time ago. But seeing it with my own eyes, this is the first time.

What appeared in front of Xiao Yu's eyes was a completely visible and unstoppable shijie.

In the three-dimensional shijie, a spaceship is closed to Xiao Yu, and a star is closed to Xiao Yu. A Lukka is closed to Xiao Yu, a cell, an atomic nucleus, all are closed to Xiao Yu.

But after having a four-dimensional perspective, all of this became open to Xiao Yu. Xiao Yu could see all the details of all the objects in front of him.

In the laboratory of the Hebei, the small black ball that Xiao Yu used to conduct faster-than-light navigation experiments was no longer the appearance of a round ball in Xiao Yu's eyes. No, it's supposed to be a ball. But Xiao Yu can see the core of this ball at the same time.

Xiao Yu can see the outer wall of a spaceship at the same time as its inner wall. See the hearts of the Luccas while seeing their skins. While you see the epidermis of the heart, you can also see the blood vessels inside the heart. When you see the blood vessels, you can also see the blood inside the blood vessels......

Three-dimensional shijie. There are no secrets about the four-dimensional shijie. If you lose a ring in 3D shijie. And I don't know if it fell under the bed or in the crack of the table, after you have a four-dimensional view, you can see the presence of the ring directly without moving the bed and the table.

Four-dimensional shijie, that's how magical.

But being completely visible means an extremely large amount of information at the same time. Fortunately, Xiao Yu has extremely large computing power. I didn't fall into vertigo.

"I was able to see all of this through optical instruments, proving that light can travel above the fourth dimension. I can feel gravity, proving that gravitons can also propagate in the fourth dimension. That is, three-dimensional objects. In the four-dimensional space, there is still mass. The four-dimensional space is really amazing. ”

Xiao Yu sighed, manipulating a robot directly through the wall.

Neither the walls nor the robots were damaged. Because the robot passes through the wall through the fourth dimension.

No matter how strong the walls are, no matter how strong the defense line is, there is no defense against the objects above the fourth dimension.

At this moment, Xiao Yu thought a lot.

"If I can master the fourth dimension, wouldn't it be any enemy, like a paper tiger to me, no matter how strong their ship shells are, supernova explosions can't destroy them, and they will definitely not be able to withstand attacks from the fourth dimension......"

"However, the fourth dimension seems to be a technology that can only be mastered by a seventh-level civilization. I don't really understand what Taihao is talking about about evolutionary failure, wandering on the verge of destruction, but I seem to be able to simply understand it as an existence between a sixth-level civilization and a seventh-level civilization. Taihao can only have incomplete four-dimensional space ability, does this mean that if he really enters the seventh-level civilization, he can fully master the four-dimensional space? ”

"Neither the Sweeper civilization nor the Guardian civilization has mastered the technology." Xiao Yu sighed, manipulating all the instruments to collect data with all his might, "Taihao said, it is a C-type Taihao civilization, I don't know what kind of special abilities the A-type, B-type, D-type Taihao civilization has, I don't know the Taihao civilization, how many types will there be?" ”

"The universe is so vast that I can't guess it." At this moment, Xiao Yu felt great emotion in his heart.

"Little one, have you seen enough? It's time to get out. ”

At this time, Xiao Yu received a message, and then, Xiao Yu's eyes shook again, and then looked at this shijie through the optical instrument, and it had already returned to its normal appearance.

The scenery of the four-dimensional space is like a dream.

"It's really amazing." Xiao Yu sighed.

"Is it magical? I'm a little nostalgic for the three-dimensional perspective. Taihao said, "Civilization can only evolve in collisions, and I hope that the trip to the galaxy can allow me to make some breakthroughs." ”

"Collision?" Xiao Yu's heart tightened, and he said tentatively: "In our galaxy, as far as I know, there are two, no, at least three super civilizations. ”

"Oh? Let's hear it. Taihao asked with interest.

Xiao Yu forcibly suppressed the excitement in his heart, organized his words, and said, "The first one, we usually call it the Sweeper Civilization. This civilization is very powerful, so powerful that I can't imagine it. ”

"Are the Sweepers civilized?" "Looking at the name, it seems that it is a destructive civilization that will destroy all civilizations it perceives. It's a little similar to me. But killing weak civilizations no longer makes sense to me. Otherwise, little one, you would have died long ago. ”

Hearing this, Xiao Yu didn't know what it was like in his heart. I had to curse secretly in my heart: "Crazy, all crazy." ”

"The second civilization, we call it the Guardian civilization." Xiao Yu said, "This civilization is in confrontation with the Sweeper civilization. ”

"Guardian civilization? Looking at the name, it looks like a type of civilization that gets luck by stifling the development potential of weak civilizations, but they just deceive civilizations at level 4 and below, and civilizations at level 5 basically won't fall for them. When encountering a level 5 civilization, they will tear off their masks and act as sweepers. This is a very hypocritical civilization. Taihao commented concisely.

There is a message in this passage.

"Level 5 civilizations basically won't be fooled?" Xiao Yu pondered, "Does that mean that in the galaxy, in addition to the two major shili of the Sweeper and the Guardian, there are many independent fifth-level civilizations?" This is also a big variable. By the way, Tai Hao said that the information storm has lethality to the third, fourth, and fifth-level civilizations, and although the fifth-level civilization will not become extinct, it will also greatly damage its vitality. Perhaps, this is an opportunity for me to sneak up on a fifth-level civilization......"

Xiao Yu thought secretly.

"The third civilization is the D-type Taihao civilization I told you about." Xiao Yu said.

"I am not very interested in this Taihao civilization, it belongs to a different type of evolution from me, and its evolutionary path has no reference significance for me. If there is no other goal, I would be happy to fight with it to relieve my boredom, but since there are other civilizations, then forget it. Sweepers and Guardians, I'm very interested. In the next few years, I will find them, exterminate them, and gain access to all of their technology. ”

Taihao said lightly, his tone was as easy as saying that he was going to kill a chicken.

"The strength of the Sweeper civilization may be a bit beyond your expectations." Xiao Yu said, "I once heard that they hollowed out a neutron star and transformed it into a neutron battle star. Moreover, they once slew a powerful Ghost Clan......"

"Neutron Battlestar? Neutron Battlestar? Taihao suddenly became excited, "It's a neutron battle star?" Then I'm going to go and meet them for a while. Who would believe that something like a neutron battle star could be transformed without complete four-dimensional space technology? I'm going to find them, kill them all, and plunder their technology. ”

Xiao Yu quietly breathed a sigh of relief in his heart.

For the sake of his own survival, Xiao Yu doesn't mind using some means to help him cut off some enemies.

"It's enough to have this information, in order to thank you, little guy, the next information storm, it's up to me, by the way, in the information storm, there may be some very interesting scenarios, you have to pay attention to collecting."

"An information storm? Isn't there still a year to come? Xiao Yu asked a little strangely, "Moreover, what is the information storm?" Interesting scenario? How do I collect it? ”

"I'm traveling faster than light in a leap to the edge of the galaxy. Through a four-dimensional search, I perceived the breath of a powerful civilization there. At close to the speed of light, the speed of time changes, you know that. That's right, a year has passed in the outside world. An hour later, the information storm will come. ”

"Get ready to observe, little one." (To be continued......)

PS: Sure enough, if you don't die, you won't die, and if you don't ask for a monthly pass, you won't have a monthly pass...... Although the update has not been strong in the past few days, I still weakly ask for a monthly pass......