"First of all, nothing can come into being from nothing, this is a philosophical theorem and a universal truth. If we keep going up, it can be a bottomless path for our lives. Teacher Cai held his staff, his expression was serious, and his voice was sonorous, and at first glance he really looked like a teacher who was preaching and cultivating.

"So we can't go back in time. He said in a deep voice.

Therefore, the mystery of the universe is the eternal research subject of scholars, and it is the lifelong pursuit of wise men. There have been many models of the universe in our world, which are the crystallization of the wisdom of sages and used to deduce the process of change in the universe. ”

This model has been reshaped and perfected by generations of sages, and there is still the possibility of being modified or even overturned. ”

"Hmm. Cheng Yun kept nodding in agreement.

"In the model of the universe that has been deduced from our world to this day, the most likely reason why the universe became the way it is is because of the Big Bang. The little mage said calmly, "The Singularity Big Bang theory has existed in ancient times in our world, and it has been continuously revised and improved for thousands of years. So I directly translated this theory of our world as the singularity of the Big Bang, but in essence they are different. ”

"Where does the singularity come from? ”

"Ancient mages could say that it was made out of nothing, but modern magic science does not support the words 'out of nothing'. With our lives, we may not be able to explore its origin in our lifetimes, and this is our sorrow. There are many archmages who are willing to exchange their lives for the truth, but no one gives them this opportunity to 'hear the Tao and die at night'. Teacher Cai's eyes were full of emotion when he said this.

From his hot eyes, Cheng Yun could see that if there was a chance for him to smell the Tao, he would definitely be able to die at night.

"Let's get to the point. Cheng Yun reminded.

Teacher ......Cai choked on him, and most of the emotions he had just stirred up were suddenly extinguished, and then he glared at the student who had no respect for knowledge at all, but his student ignored it.

Remembering that this was the cosmic boss, he shrunk his neck, and continued: "Let's not trace where this singularity came from for the time being, and we don't argue about why it exploded, what it is made of, whether it exploded on the spot as soon as it appeared without saying a word or whether it exploded after a while, we have no way of guessing what happened before the explosion, the only thing we can touch is the energy generated after it explodes." If the universe really originated from explosions. ”

"Based on the energy produced after the explosion, through the long-term research of countless sages, we can infer the energy it contained before the explosion. This is the origin of all things. Teacher Cai's voice became deeper and lower, and his pressure became higher and higher.

"Go on. Cheng Yun was originally not interested in these nonsense, but gradually listening, he couldn't help but sit upright and put away the casual posture he had before.

"This may be a departure from the Big Bang theory of your world. Originally, many archmages and sages speculated about the composition of the singularity, but now the most widely accepted theory is that the singularity is composed of a highly concentrated energy, which is the origin of all things, so we call it the origin energy. Of course, this is the result of translation. ”

"Origin Energy!" Cheng Yun was no stranger to this word.

"Yes, it is the initial energy of the universe, the source of all things, and the name "origin energy" is the best description of it. Teacher Cai's eyes were full of stars, which made his eyes look extraordinarily bright.

"Because the beginning of the universe was a primordial primordial state, like chaos, nothing. There is no space, there is no matter, there is no movement, so time has no meaning. It was the explosion of Origin Energy that expanded the space, and the universe of our world continues to expand to this day. It is the origin energy that made up the original matter, and then evolved everything in the world, including the stars, including you and me, including strawberry cake. ”

"The most important thing we talked about in this class was energy. ”

"To be more detailed, we generally believe that the Origin Energy splits in two after the explosion. Teacher Cai put up two fingers, then turned around and took a marker pen to draw two diagonal lines on the blackboard, and wrote two symbols respectively, "The original origin energy is almost non-existent, and the Mae Sot Federation of our world has invested a lot to build a laboratory, and the origin energy captured is pitiful, and I don't know if it's true or not." But it doesn't matter, at least you have been exposed to the two energies that are differentiated from the origin energy. ”

"Yes......" Cheng Yun said.

"Yes. Teacher Cai nodded solemnly, "They are material energy and mysterious energy. That's what we call them. ”

"Oh!" Cheng Yun immediately understood.

"Material energy is common, and any form of energy that mortals have access to, including the mortals themselves, is material energy. Teacher Cai said, "As I just said, there is no matter in the universe, but now the universe is full of stars, mountains, water, flowers and plants, all kinds of creatures that can run and jump, and delicious strawberry cakes, where do these come from?...... Please answer this student. ”

“…… Converted from material energy. Cheng Yun looked at him very painfully, but still cooperated with his performance. He had heard of Einstein's theory of mass-energy conversion.

"That's right! That's a great answer!" Mr. Cai looked at him affirmatively, very satisfied, "At the beginning of the universe, it was this energy that created matter and antimatter, including the ordinary matter that we can see today, as well as the hidden matter that we can't see or touch, all of which are created by this energy. Of course, you and I ourselves also come from this material energy. ”

"You've been exposed to mystical energy. "That's another kind of energy that is used to support the universe." This energy itself cannot be accessed by us, but in the long process of evolution, we don't know when we began to mix this energy in our bodies, so we began to gradually study and control this energy that is more stable than material energy and has a higher energy density. ”

"......" Cheng Yun felt that his head was a little big.

"It's actually very simple, if we say that the universe is a balloon, the air inside is matter and energy. You can say that the universe is a space that holds matter and energy, or you can say that matter and energy hold up the universe. Mr. Cai himself was a little unreasonable, so he simply made an analogy, and then he directly skipped the topic.

"Actually, I don't know much about space-time theory, if you're willing to lend me Kun Zhenqiu......" he said.

"I want to understand the relationship between the universe and the universe, or the relationship between space and space. Cheng Yun frowned.

"The relationship between the universe and the universe...... Teacher Cai was a little embarrassed, "because there is no force in that world that can break the barriers of the universe...... No, there are already two people who have traveled through the universe. Well, despite this, only me and Mentor Kunzhen have traveled through the universe, so apart from me and Mentor Kunzhen, there is no one in our world who has seen the second universe. ”

"We can only explore it through other methods such as speculation, side observation, conjecture and verification. ”

"We confirm that there is more than one universe in the world, but how to confirm it, I don't know, my knowledge has not yet reached that point. But it's certainly not someone who went to another universe and came back to tell everyone. ”

"For the universe and between the universe...... I probably only know a distance relationship, or a popular science in a movie. "There must be a distance between universes and universes, but space mages believe that this distance is not a physical distance, but the amount of energy it takes to travel from one universe to another. They challenged the cosmic barrier by pointing different ways as they traveled through space, and then calculated and speculated on the feedback that one universe could lead to many universes, but the energy consumed was different. ”

"If we take this energy and turn the universe into a point on a plane, it happens to conform to the law of physical edge length. It's an amazing thing. ”

Of course, because these theories are only theories and have not yet been proven, I dare not say that they are necessarily correct, and I don't know if the distance between the universes is the physical distance or some more mysterious relationship. But if you think of the universe and the relationship between the universe as boxes on a plane, it's definitely not right. ”

"I also know the composition and structure of the universe ......"

"This is the theory of the sage of the public ......"

"Ah, yes, and Mentor Kunzhen's conjecture about the structure of space before he went into hiding......"

"......" Cheng Yun was very helpless when he heard it.

But in the end, there is still a bit of gain.

Some of the little mages themselves do not confirm the authenticity of the theory, and the proposer cannot verify it, but Cheng Yun can verify it.

The elliptical ball of light in front of him is the node that connects the endless universe, and he himself is also the boss who controls the shuttle of the universe, every time there is a traverser coming and going, every time he approaches the node ball of light, and even as long as he stays in the node space and feels it with his heart, he can feel a lot of things. Before these theories, he was at a loss and vague about his feelings, but with these theories, as soon as he verified them in his heart, many things became organized and clear.

"That's all for today's lesson. The little mage picked up a rag and wiped the dense handwriting on the small blackboard, and then quickly got out of the state of 'picking a teacher' and looked at Cheng Yun flatteringly.

"Look, Captain, that Kun Zhen Ball ......"

"Take it, take it!" Cheng Yun beckoned, and the Kunzhen ball flew over and landed in the little mage's hand.

"Thank you, stationmaster, thank you, stationmaster!" the little mage thanked him again and again with the crystal ball in both hands, as if holding a holy decree.

His gaze at the crystal ball was full of reverence.