Coming to space-time technology, after this laboratory came to this celestial region, the technology that was researched due to unexpected events was also really high-tech in the laboratory.

When it comes to space-time technology, traveling through time and space is a topic that can't be bypassed. Li Yu once believed that it was impossible for this universe to travel through time and space, because this would greatly damage the stability of the universe.

In order to maintain the stability of the universe, time travel is forbidden by the rules of the universe itself.

It's just that later discoveries proved that Li Yu's initial conjecture was wrong. In this universe, time and space travel can occur, but the cost of appearing is unusually large.

Leaving the earth this time, continuing the previously interrupted test sacrifice, and meeting Mo, who claimed to be an old friend of the laboratory, Li Yu's understanding of time and space went further.

At this stage, Li Yu has a deeper understanding of the nature of space-time technology. For time and space travel, Li Yu can also conduct fundamental research.

But Li Yu never imagined using a black hole to travel through time and space!

What is a black hole? To put it simply, a black hole is an infinitely small being with infinite mass.

Due to its extreme mass, the space and time inside it are very different from the existence of cosmic space in normal times.

Li Yu believes that the existence of black holes can already break through the barriers of dimensions, crush and mix the dimensional spaces in this universe, and form a special kind of space.

This special space is not large, that is, a small area in the center of the black hole, and if it leaves the area, the power of the black hole will be greatly reduced, although it will also cause a great distortion of time and space, but it will not penetrate the dimensional space.

The existence of a special space theoretically provides an opportunity for time and space travel.

It's just that this kind of opportunity, you can completely imagine how dangerous it is, anyway, Li Yu definitely doesn't want to travel through time and space in this way.

Now, there are people who are traveling through time and space in this way. Needless to say, how dangerous it is?

"This way, of course, is dangerous! It's just a slight mistake, and the ship will be destroyed and people will die. However, it seems that the ship is lucky, and so far they are safe. ”

"It's lucky, but I don't recommend using it this way to travel through time and space."

Li Yu's explanation was a bit simple, and Fang Qianmo and the others were dissatisfied: "Li Yu, there is no relevant information in our database, don't you have the idea of researching this aspect?" ”

"Of course, we have a more efficient and useful way, why use this dangerous and uncontrollable way?"

Uncontrollable danger? This definition of Li Yu has attracted the attention of others!

"Uncontrollable danger? You can't control the danger either? Lin Wanbai blinked.

"For time travel, time bubbles are a safety mechanism. The level of science and technology is not enough, and you can't use the space-time bubble, so you can only look at luck in the space-time bubble. ”

"The level of science and technology is sufficient, and the space-time bubble is the protective layer of the time-traveler."

Space-time bubbles are still a protective layer, which is a new proposal.

Li Yu continued to explain: "You must know that after passing through time and space, there is anti-energy in the body of the traverser, which conflicts with the positive energy in real time and space. ”

"You mean, the black hole has destroyed the space-time bubble, so the fate of that spaceship is actually not much better?" Fang Qianmo thought of this.

Li Yu nodded: "That's right, without the protection of space-time bubbles, the effect of anti-energy and positive energy will ruin them." ”

"Huh! In this way, the function of the space-time bubble is to give the time-travelers time, so that they can neutralize the anti-energy on their bodies, so that the time-travelers can integrate into normal space-time? Sun Yixuan smiled and said her understanding.

"You're right. In addition to the abnormal time and space travel, mastering the space-time technology, if there is no energy neutralization technology, to carry out space-time travel is to find death? ”

"That's probably what it means."

Everyone understands what Li Yu meant. Once you have mastered space-time technology, then energy neutralization technology is not a thing. Then the consequences of time travel are not too serious.

Isn't it just that you are worried about changing history? This kind of worry is not a problem for people who have mastered space-time technology.

The universe itself has its own corrective mechanism, and if you want to change history, in terms of its consequences, the difficulty is different.

On the earth, the difficulty of a person traveling through time and space, returning to the past, and changing history is different from the difficulty of a person returning to a super civilization in the sea of stars to change its history.

The difficulty of people on the earth to reach their goals is much lower.

"Li Yu, there's a problem. If a person goes back in time and changes history, how can the paradox be resolved? ”

Li Yu's current theory has agreed on the realizability of time and space travel, so how should Li Yu solve the paradoxes that have existed since the emergence of the theory of relativity?

In particular, their discussion here does not include parallel universes.

In fact, the so-called paradoxes are only the result of insufficient theoretical understanding. Now that you have a certain understanding of space-time technology, you must know that if a person returns to the past due to an accident, then the space-time bubble is the first problem he will face. ”

"Without solving this problem, he will not be able to have any impact on the past."

When Li Yu said this, Lin Wanbai had a problem: "This is not right, the situation of Ainstar is not at all the same as what you said." ”

"Of course it's different, you didn't notice, I'm talking about a person, but Einstar, they have almost the entire planet has a space-time anomaly, and the level of the two is not the same."

"Like you said, if there is a space-time anomaly on the entire earth, then needless to say, the entire earth will be surrounded by space-time bubbles."

"You mean, if you are alone, the space-time bubble generated will only surround the target person?" Fang Qianmo thought for a moment, and then said.

"Of course."

"I understand that if the problem of energy neutralization cannot be solved, then the space-time bubble does not have to disappear, then it is almost impossible for this person to make any changes to the past."

"But what if he solves the problem of energy neutralization?"

This question will involve questions such as the grandmother paradox.

Needless to say, if the space-time bubble does not disappear, because of the existence of anti-energy, the traverser is a foreign body to the universe, and if this person wants to change history, the universe will have a corresponding mechanism to stop his behavior.

For example, all kinds of accidents and so on.

If this person solves the problem of energy neutralization, the universe will not see him as a foreign body, but this does not mean that he can act unscrupulously.

"Changing the past will certainly affect the future. First of all, you must understand that the problems that arise under space-time technology will ultimately come down to energy. ”

"Somebody killed his grandmother, and he couldn't have appeared. So, does time travel still exist? ”

"To understand this, you need to make a difference. If the act of killing his grandmother was carried out by himself, then there would be a problem, the energy of time and space would be out of balance! ”

"The energy of time and space must be balanced, and this kind of behavior will have two consequences, one is that he cannot restore the balance of time and space energy, so he must let himself disappear and restore the balance of time and space energy."

The disappearance that Li Yu is talking about here is not death, but really disappearing out of thin air!

"You mean to say that the grandmother who traveled through time and killed him, he himself would disappear, but the fact of time travel exists, that is, the future has changed! But no one knows? ”

"Qianmo is right, that's what it means. However, again, the energy of time and space needs to be balanced. The disappearance of a person will not cause much change in history. ”

Space-time energy needs to be balanced, so history will change slightly, but the big trend will not change?