"Bang dang!"

The sudden jolt of the spacecraft caused Li You to crash headlong into the wall next to the bed. The pain caused him to wake up immediately from his sleep.

Together, I found myself in an unfamiliar environment, and looked around nervously.

"Awake?" It was only when the sound of glasses came from the bed next door that he remembered how he could lie here.

After pushing the ignition gate up just now, I felt that my scalp was numb and the scene in front of me began to blur when I was ventilating. Especially the tinnitus, which caused him to faint without hearing Maureen's words clearly.

After that, he felt that he had been lifted up, and the light reflected in his eyes was caused by the lenses of the glasses he was wearing.

"Well, thank you, glasses." After Li You finished speaking, he looked around.

There are a total of four beds in this cabin that are fixed to the floor, and there are harness-like cords on the walls. It may have been designed for fear of danger caused by the impact of the spacecraft when it sleeps again.

In the distance directly opposite the gate, there is another gate, and I don't know what kind of facility it is. Other than that, there is nothing else.

"No, I have to thank you! If you hadn't lit the ionization thruster in time, we'd have just waited to die. After speaking, he put down the book in his hand, and Li You glanced at the title of the book, which was Albert Einstein's "Special Theory of Relativity".

When Li You pushed the ignition gate, he fell into his own memories, and after waking up slowly, he suddenly felt that he had to learn more scientific knowledge if he wanted to understand his situation.

Thinking about it, he looked up at his glasses and asked him if he could help him a little, which showed that he was concentrating on his hard work and could not bear to disturb him.

The glasses suddenly felt that the room was quiet, turned to look at Li You, and felt that some slight changes seemed to have occurred in him for a while, so he asked without thinking: "Li You, are you okay?" ”

"It's fine. However, I ...... I actually have one thing I want to ask you for. ”

"Say, as long as it's within my ability, I'll do my best to help."

Seeing that his expression was serious, and he didn't look like that kind of philistine, Li You thought that it was not so difficult to deal with nerds, so he asked:

"I want to say, if you can, can you build a machine that can travel through time and space?"

Hearing Li You ask about the marginal science he was interested in, a smile leaked on his face, and he closed the book and said to him: "I'm not blowing, if I really prepare resources and equipment for me, I can build one, a hundred, ten thousand machines." ”

"Is that an exaggeration? Can you tell me a little bit about the principle? ”

The glasses rolled their eyes, and then said meaningfully, "Okay, I'll try to pick something you can understand." ”

After finishing speaking, the glasses looked at Li You cross-legged and said that this time and space, generally speaking, is to move from one space to another time period through a certain way, which means that we have switched the timeline.

But when I say this, there is a "grandmother's refutation".

"Grandmother's refutation?" Li You asked inexplicably.

And the glasses also patiently explained: "Yes, the grandmother's argument means that if you go back in time and kill your grandparents before your father was born, but this action will create a paradoxical situation: if you go back in time and kill your young grandmother, your grandmother will die without a father, and without a father there would be no you, then who killed your grandmother?" Or take it as: Your presence means that your grandmother did not die because of you, so why did you kill your grandmother? ”

"Is it possible that if I really travel through time and space, I will not be able to kill my grandmother, or kill anyone, and I can only watch everything continue as it was originally developed?"

Hearing him say this, he took them off, rubbed his eyes and put them back on, and said in a disapproving tone: "Then, what is the point of traveling through time and space?" ”

At this moment, Li You didn't know what to say. That's right, since you have returned to the past, you must want to change some established facts, otherwise you will only be an observer when you go back, and you will really lose the meaning of traveling.

"Actually, what you said is more or less reasonable, but it's a little too simple", the glasses looked at the ceiling and sighed: "Hey, in this universe, even people who live happily will have the idea of traveling to the past and changing some things." ”

After waiting for the glasses to ponder for a long time, he continued, however, there is another meaning of traveling through time and space, that is, like Li You, he came to a different time and a different space in an instant.

Moreover, this crossing has long been confirmed with certainty. A long time ago, on the original earth, scientists used two light particles to do experiments.

In the experiment, they examined two possible outcomes from a time-traveling photon. The first result is that Photon 1 will enter the past through a wormhole and interact with its former self.

The second result is that "Photon 2" will travel in normal space-time, but will interact with a photon stuck in a time-travel ring-closed time-like curve through a wormhole.

Simulating the behavior of Photon 2 allows the behavior of Photon 1 to be studied. This confirms that time travel is perfectly achievable on the quantum scale.

Imagine, but if you compare people to particles, you can travel through time and space as long as you have the right equipment.

"In the quantum realm, there are many wormholes in the air that are invisible to the naked eye, but can be detected. I think that instrument of yours is the tool used to open and enlarge these wormholes. It's just that I haven't found concrete evidence yet. ”

In the next time, the spaceship shook a few more times, and Li You was a little worried about whether the crisis had not passed, but the glasses were giving him a lesson, and he was embarrassed to leave, just patiently listening to him.

"Ever since the multiverse was confirmed to exist, the descendants of those of us who escaped Earth have been studying this knowledge. It's just that there is too little information available for research, and if I hadn't met you, I wouldn't have believed that there really was a parallel world. ”

What he said was exactly what Li You was most worried about. Now several people on the spaceship are very good to themselves, but if they return to the Martian transit station, will his compatriots treat them like this?

Not to mention the safety of his own life, just talking about the "key" that led him through time and space will definitely be taken away.

Then, you have to hide the key before you reach Mars. Or, just slap your ass and leave.

"Don't worry, although I'm a nerd, I still understand things", the voice of the glasses interrupted Li You's thinking, and then he carefully leaned into Li You's ear and said: "When you get to Mars, I will give you your instruments, and you can get out of here quickly." ”

Li You looked at him in surprise, his glasses thought he didn't understand, he looked left and right, and added in a low voice: "Duanmu told me in the laboratory just now that he wanted to give it to the people above. ”

This sentence really confirms Li You's opinion on Duanmu. Let's not say that he can't figure it out, this "Duanmu" is a Chinese surname or an island country surname.

Just by looking at her eyes, she felt that this person was disgusting from the bottom of her heart. Moreover, Duanmu is with Mo Lingtang, who he has a good impression of, which is also unforgivable.

"If you're smart, don't show your dislike for Duanmu." After finishing his glasses, he continued to flip through the theory of relativity in his hand.

"No, wow, I think I'm normal."

"Hahaha," looked at the book with glasses, didn't raise his eyelids, and said with a smile: "You have written it all on your face, normal wool!" ”

This sentence really touched Li You's sore spot, since he was a child, he has been the kind of person who is very susceptible to emotional influences.

Happy and sad, like the weather forecast, hang on your face at any time to remind the people around you that he is not the type to get along with.

It may be that this is what causes him to not be treated very well wherever he is. Especially when he sees someone he hates, he will ignore them at best, and at worst he will speak ill of them.

In life, if you want to live a comfortable life, the most important thing is to socialize. However, since the incident after his sister fell into the water, he has hardly had a decent friend by his side.

Memories are like a tidal wave, slapping Li You's head wave after wave, at this moment, he really wants to pour out all his distress and grievances.

"What are you doing? Hurry up and go to the dormant chamber, we're out of danger now, and my sister is setting the course of the voyage. ”