"You are a student of archaeology, you must know a lot of myths, legends and historical stories of your people, this land is full of mystery and witness miracles, and countless cultural relics have been unearthed." Ling Moyu.

"Yes, this is the birthplace of the entire human civilization, and the Sumo civilization here first appeared in writing, state, and bronze, which are all important symbols of civilization. There is evidence that other major existing civilizations were influenced to a greater or lesser extent. Interestingly, the myths and stories here have been reinvented and spread to other places and become the stories of other peoples. ”

"For example, we often say that Athena was born by splitting the head of her father Zeus, and this story was spread in the valley of the two rivers more than 1,000 years ago, and later spread to many places."

"But there are unique legends here, stories that don't exist anywhere else. There is a legend that when the creator created the world, there were 7 keys handed down, and whoever can get these 7 keys can restore the world to order, to put it bluntly, it is like a computer restart, of course, the rebooter is a new generation of creators, who can obtain unparalleled power! ”

"The myths of almost every country have the saying of Genesis, although they are different, but basically one main god created everything in the world, is this from the Sumo civilization? It's just that there are no 5 keys to restart the world, and it may be that in the process of circulation, I added my own understanding and creation. Ling Moyu said thoughtfully.

"However, there is a saying of reincarnation in many civilizations, a person can be reincarnated, then a world can also be reincarnated! Similar to some cosmological hypotheses, astronomers have many hypotheses about the fate of the universe, one of which is the theory of reincarnation, or the Great Collapse. ”

"You know, the result of modern cosmological observations is that the universe we are in is still in the process of accelerating expansion, that is, the universe is getting bigger and bigger, and this expansion is faster than the speed of light." Ling Moyu explained.

"Don't they all say that the speed of light is the ultimate speed of the universe? Moving objects faster than the speed of light have never been found, so how can there be superlight again? Hazanne asked, puzzled.

"To be precise, the speed at which light travels in a vacuum is the limit of the cosmic speed, and the speed of light is constant. Without the condition of vacuum, the speed of light also changes, and it is now found that the speed of light in some media cannot reach the speed of light. Of course, the speed of light exists as a hypothetical condition of the special theory of relativity, which Einstein did not know at the time, and no one still knows why the speed of light is the limit of speed, but only takes it as an axiom. Ling Moyu continued to explain.

"However, the expansion of the universe is not produced in a vacuum, in fact, it can be said that the expansion of the universe creates space, that is, the creation of a vacuum, and this process of creating space is of course not subject to the law that the speed of light cannot be surpassed." Ling Moyu said.

"So what's beyond the universe? What is outside the universe, there must be a boundary, so what is beyond the boundary? Hazanne looked at him with wide, beautiful eyes and bewilderment.

This is a question that cannot be answered by humans, and I am afraid that only the Creator can answer. Generally speaking, it is generally accepted that the universe is bounded and boundless. ”

"In order to understand our three-dimensional universe, let's first descend to the two-dimensional world. Take the first example about the two-dimensional world, our earth. The surface of the earth is a spherical curved surface, and without considering the fact that human aircraft fly away from the earth, the field of human life is nothing more than planes going up to the stratosphere and down to the depths of mines on the surface of the earth's crust. Compared to the scale of the entire earth, we are equivalent to living only on the two-dimensional surface of the earth. On such a two-dimensional surface, does the earth have a boundary? No. The same goes for the three-dimensional world. Ling Moyu said with his hand in the air in a circle.

Hasanna's eyes became even more confused, and even her mouth opened, "I seem to understand a little, you mean that we just live in a cage, but this cage is relatively large, as big as the whole universe!" Hazanne said.

"But according to my understanding, this is not the case, first of all, you ask what is outside the universe, you must know that our universe is a space existence, and your so-called outside is itself a space concept, only within the space there is a difference between inside and outside, for example, what is next to you? The premise of this question is that in the space, what is next to you, and if there is no space, where is the next side? So what about the inside and outside where there is no space either? In addition, it is as if our universe is constantly encroaching on other people's territory, occupying it is inside, and what has not been occupied is outside, in fact, we don't know where space comes from, or even whether it exists or not. ”

"Because space cannot exist alone, and there is no absolute vacuum in the universe that is free of matter and energy, this means that space must exist with matter and energy at the same time, just like a room cannot only have a floor and a roof, it must have pillars to support the whole house. So, the question you asked outside the universe no longer exists in itself! Ling Moyu finished gushing endlessly, only then did he notice Hasanna's stunned expression, and her mouth was wide open as if she didn't know him at all.

"You said that you are a soldier, you don't train well to fight, and you think about these things all day long." Hazanne said with a smile.

"I'm sorry, I'm actually a Ph.D. in theoretical physics, but I'm not really engaged in astrophysics, I'm engaged in elementary particle research, and the study of astrophysics is just a matter of ordinary knowledge, but I believe that this boundless universe, its secret is hidden in the small elementary particles, maybe every elementary particle is an incomparably magnificent universe." Ling Moyu said a little excitedly.

"I really didn't see it, you are also a doctor, or a doctor of theoretical physics, when we first met, I really thought you were a special forces soldier who kills people without blinking!" Hazana was a little impressed by Ling Moyu.

"We're not the same, you're a doctor of archaeology from Cambridge, aren't you also dressed up as a modern-day Mulan." After saying that, the two laughed together.

"But when I graduated with my Ph.D., I really wanted to go to Cambridge for postdoctoral research, but then I didn't make it." Ling Moyu had some regrets.

"It's okay, there's still a chance, when the war is over, you can still go, and I'll be your guide." Hazanne said.

"Yes, the war is coming to an end, and only those who have experienced war can know the value of peace." Ling Moyu said with deep feelings.

The two of them chatted for a long time unconsciously, and when they didn't see it, they subconsciously looked at their watch, it was already 11 o'clock in the evening, so they got up to say goodbye, and Hazanne sent him out of the door and watched him return to his room.