When Mia opened her eyes, she saw herself sitting in a room.

The room was airtight, and all the corners were filled in, making it look like an old-time foolish practice to remove mold from the corners.

The professor sat cross-legged on the floor in the center of the room, surrounded by three students, including Mia. Two men and two women seriously discuss unclear academic issues with the professor.

And, all with shaved heads, five large light bulbs shining in the room.

"The important thing is to eliminate the horns." The professor continued, "Those hounds are not high-dimensional creatures, they actually live in dimensional fragments. ”

"What do you call dimensional fragments? First of all, you need to understand the concepts of 'continuous' and 'discrete'. The professor took a male student and asked, "John, let me ask you." ”

"How many points are there in a straight line that don't duplicate each other?"

"Ugh." The male student was obviously stunned for a moment, "Countless of them? ”

"That's right." The professor said, "For another example, instead of a straight line, there is a 1 cm long line segment that is closed at both ends. ”

"There are still countless of them." Another schoolgirl named Mary replied.

"Yes." "That's what continuity means," the professor laughed. ”

"A continuous world means endless possibilities. A continuous three-dimensional world can accommodate an infinite number of two-dimensional faces; A continuous two-dimensional surface can contain an infinite number of one-dimensional lines. And the discrete ......"

He shrugged: "As a continuous antonym, 'discrete' isn't so wonderful. ”

"In a discrete world, space and time are isolated. How many points are there in a discrete straight line? Limited. Even in our definition, a straight line in a discrete world cannot be called a straight line, but rather 'a collection of lines arranged in a line with a large number of points'. ”

Mia:?????????????

"Miria." The professor looked at her, "Do you have any questions?" ”

"I ......," Mia opened her mouth and said in frustration, "I have no doubts. ”

In fact, she didn't understand a word. So don't talk about questions, she doesn't even know how to ask questions.

"Professor, your remarks remind me of wave-particle duality." The male student named John flattered the idiosyncratic saying, "In the microcosm, they take on the character of discrete, particle; In the macroscopic state, they are continuous, wave-like. ”

"That's the contradiction in our world." The professor nodded and said, "Regarding the origin of the world, some people advocate 'string theory,' which says that all particles are made up of closed and curly strings. This is the philosophical thinking that clearly holds that 'continuous' is greater than 'discrete'......"

The crowd was exhilarating and communicating, and Mia's little head soon drooped and she was almost asleep when she listened.

Outside the screen, everyone looked at the sleepy Mia, and they were also speechless. Bishop Chino in the monitoring room had a serious face, and in fact he was already laughing proudly in his heart.

Sure enough, it was right to choose the peaceful mode. For these mercenaries, no matter how fierce and dangerous the battle is, it is far less torturous than the academic theories that require the use of brains, hahahahahahahaha.

"That's it." The professor concluded, "I must stress again. ”

"These hounds live in a discrete space-time. For them to come into our world, they must pass through anything less than a 120-degree angle. ”

"The shape of an object affects its gravitational field distribution. Rotate the 120-degree angle around its angular bisector and we get a cone. This cone, and the sharper one than it, creates a hole in the gravitational field—a hole that allows the hounds to pass through and descend on our world. ”

"So, before encountering a hound, we have to make sure that we eliminate all the corners around that are less than 120 degrees...... If it can't be eliminated, seal it up. ”

"Uh-huh." Mia nodded nonchalantly along with the other students' movements.

"Now, let's put on gloves and braces and eliminate the sharp angles of our fingernails and teeth." The professor said.

Everyone followed the professor and put on special gloves and braces.

"Then there's the special inflatable suit." The professor said.

Everyone then put on bulky protective clothing, which is made of special materials without any gaps or wrinkles, and looks like a humble Kumamon puppet.

"Hahahaha!" Looking at the stupid dress of everyone around her, Mia couldn't help but laugh, "What the hell is this look!" ”

Professor:..................

Other Students: ........................

"Miria, you seem to be acting particularly ...... today Excited. The professor weighed his words.

"Professor Puning, Miria is just stupid again." The schoolgirl named Maria said, "She was sleeping while you were teaching." ”

"What did you say?" Mia was furious, "I didn't sleep! I was just...... I'm just thinking about the professor's words! ”

"Oh, do you need to close your eyes when you think?" Mary scoffed.

"Huh." Mia sneered unhappily, "Did you know? In a horror movie, you are the first female partner to hang up after encountering a monster! ”

Maria:..................

"Miria!" The others complained, "Don't say such unlucky things, we have to explore the four-dimensional space next!" ”

When she saw that someone was helping her out, Mary took her arms around and sobbed aggrievedly:

"I don't feel well...... Her curse just made me feel a little uncomfortable...... This time I would like to take a temporary leave of absence. ”

The professor could only reprimand Miria harshly, and then calmed Maria with the others for a moment, and finally coaxed the schoolgirl to a halt.

"Everyone, take it." As if he was afraid that she would regret it, the professor quickly took out a few pills and distributed them to everyone.

"What is this?" Mia asked.

"Some kind of psychotropic drug." The boy named Joshua next to him said, "It can help us empty our brains, let our consciousness enter the four-dimensional space, and explore a new mysterious world...... It is said that Lao Tzu, a philosopher in the land of dragons, took this medicine and later wrote the Tao Te Ching. ”

Mia:???

She still didn't understand a word about Joshua's explanation. The only thing known is that the pill is some kind of "psychotropic drug".

Miya suddenly remembered an incident, that is, when the team first arrived in Solomon City, Asker once told everyone to shop and have fun in Solomon City, but don't touch the "medicine".

Don't touch any drugs, this is the iron rule of Asker's team. Whoever dared to violate it, Asker beat her medication, along with the previous meals, out of her stomach to the point of vomiting.

Thinking that Asker was staring at her from the screen outside, Mia immediately shuddered and quietly slipped the pill between her fingers.

"After taking the drug, our consciousness travels through the long river of time." The professor's expression gradually became serious and serious, with a certain contagious vague enthusiasm and excitement, "Ancient Greece, ancient Rome, Homo sapiens, Neanderthals, apes and dinosaurs, all things from history, past and future, are presented before our eyes!" ”

"Next, I'll turn on the recorder. When you travel in time, you must remember to describe what you see, so that when we leave the four-dimensional space, these precious information will not be lost from our minds. ”

"And ......," his voice suddenly revealed a hint of fear, "watch out for the 'hounds' that break the space.