"In fact, the universe is not just one, it has many." The patient said abstrusely.

"So you're talking about the theory of multiple universes? I know a little bit about this, but I can only understand the literal meaning Mu Qiu said.

"All right! But I don't know where to start, because I'm not an expert in this field, so I don't know much. I just use this theory to talk about it. " The patient said.

"All right! Then go on Mu Qiu said.

Then the patient began to ask, "do you know what time travel says?"

"I haven't heard of this, so I'm not sure. Can you tell me?" Mu Qiu asked.

"Well, I'll make a hypothesis first." The patient said.

Mu Qiu nods and responds.

"If you go back more than 30 years ago and kill one of your favorite relatives, that is, the parents who gave birth to you, then you won't exist, will you? Then, how did you go back and kill your parents? " The patient hypothesized.

"Are you sure this is not the wrong theory?" Mu Qiu asked.

"Yes, there is a certain fallacy in this theory." The patient said.

"Not long later, the latter theory was not like this, and it was later interpreted as" immutable theory. "

"If you go back more than 30 years ago, but you can't kill your parents, you may be intercepted by something in the process of murder, or you have killed them, but they are not dead at all."

"Well, maybe you can't find your parents at all. That's what I said! Anyway, you can't kill your parents, or you can't change the reality that you already exist. " The patient said.

As soon as the patient finished speaking, Mu Qiu began to understand and said, "OK, I'll understand when I say that, then this theory will no longer exist."

"Yes, but you're only half right. The theory really doesn't exist, but you can kill your parents when you are already born. In this way, your parents will really die, and you will still exist."

"Only in the world where you killed your parents, there will be no existence, including you in the universe." The patient explained.

In this way, when I say I exist and when I don't exist, what's the matter! Mu Qiu thought about it in his heart, just one head and two big ones.

"So where did I come from who killed my parents? Is it from another universe? " Mu autumn doubts of ask a way.

"Yes, you are right! That's how multiple universes work. "

"In fact, the world you exist in is real. But there are universes where you don't feel it. "

"These universes will change over time to form multiple universes." The patient said.

Mu Qiu asked foolishly, "how many of them are there?"

The patient was amused by Mu Qiu's question and said, "it's impossible to know how many natures there are. After all, he doesn't know how many universes he exists in."

Then the patient continued: "although I don't know how many universes there are, although the universe I used to live in is not as developed as here, you still don't know how many universes there are, anyway, there are many."

Just when Muqiu couldn't understand, DIDU began to speak.