After reading this academic discussion report, Chang Wei began to ask the system in his heart in order to verify it.

"System, the Light Chaser fleet travels across the universe to perform rescue missions. Do the rules of different universes differ? Furthermore, will these differences cause the Light Chaser fleet to be restricted by the rules of other universes? Consequently, it could be put in danger, or even killed?"

The next moment, a cold mechanical voice came from the system in Chang Wei's mind.

"Partially correct! The rules of the universe do differ between different universes. This is due to the cosmic model established at creation. Creating a complete cosmic model requires a Level 9 civilization; a Level 7 civilization barely gets started. Furthermore, due to the differences in cosmic models and the level of creation techniques, various unique rules and incredible loopholes appear in different universes. Furthermore, there are also differences in the magnitude and quality of universes!"

"Some universes are constructed based on rules that may not be based on scientific materialism. This will naturally suppress or eliminate technological capabilities. However, host, don't worry, as this system automatically screens rescue information and will not involve completely mysterious universes. All relevant rescue missions will only be carried out in universes that conform to the technological side."

"Although there will still be some slight differences in the rules of the universe, the basic structure and establishment of the universe model are interconnected across all the heavens and worlds, so even if there are major changes, the essence remains the same! Host, there is no need to worry!"

As the fleet's highest commander, Chang Wei had been exposed to science for so long that he wasn't completely clueless. After hearing the system's explanation, he immediately grasped the key.

"The basic structure and establishment of the cosmic model is interconnected across all the heavens and universes. Does this explain why, in our own universe and in other universes we visit, we only see three-dimensional space, rather than two, four, or five? And why time only has one dimension, and there are no higher time dimensions?"

The system was silent for a moment, as if confirming Chang Wei's authority level.

However, the system soon passed the authority authentication and began to respond to Chang Wei's question.

"In the many universes the host has experienced, from a macroscopic perspective, there are no higher dimensions. This is indeed related to the basic structure and establishment of the cosmic model, which is connected to all heavens and worlds. In other words, it is based on a principle and rule on a larger conceptual scale, referred to as the Dao Rule."

"Because of the lower degree of freedom, it is difficult to form complex material structures. For example, zero dimension is a point mass, which is the state of an elementary particle. If it is one dimension, it is a straight line, and electrons cannot form orbits, so atoms cannot exist. Although two dimensions can form atoms, they are too simple. Because the electrons outside the nucleus lack many quantum states, the number of electrons that can be accommodated outside the nucleus is limited, so it is impossible to form the numerous atoms in the periodic table."

"Furthermore, if there are only two spatial dimensions, the atoms formed cannot form more complex molecules. Such a world is too simple and cannot form life. Naturally, there is no possibility of progressing to a higher level!"

Chang Wei asked curiously, "So... if that's the case, then the more dimensions a universe has, the better?"

The system responded with another cold, mechanical response: "Negative! While more degrees of freedom can create more complex geometric structures, making the world appear more fantastical and colorful, more dimensions can lead to structural instability. Just like a high-precision machine, the more internal parts it has, the more likely it is to malfunction."

"Because elementary particles can form atoms, atoms form molecules, and molecules form macroscopic matter, they are inseparable from the influence of fundamental forces such as electromagnetism and gravity. But additional dimensions will cause these 'forces' to be severely attenuated!"

"Scientific simulations and practical observations have shown that if the universe has an extra macroscopic dimension, then when the distance between a planet and its star doubles, the gravitational force on the planet will decrease eightfold. Such a universe would be unable to form large-scale material structures such as galaxies and galaxy clusters. Moreover, this would also cause planetary orbits to be extremely sensitive to distance. Once there is a slight fluctuation, the planet will either fly out of the galaxy or spiral into the star."

"So, such a high-dimensional universe is actually not as rational as a three-dimensional universe, and it is even less likely to sustain the long evolution of life."

Chang Wei asked doubtfully, "Doesn't superstring theory exist? In superstring theory, in order to increase the number of string oscillation modes, the universe must have nine spatial dimensions. So... where are the remaining six dimensions?"

The system continued, "The conclusion is correct! The other six dimensions do exist. However, they are generally not easily observable on a macroscopic scale. This is because after the idyllic era at the beginning of the universe's creation, these six dimensions were continuously shrunk to a very small scale. Many advanced civilizations in the universe could not accept this continuous decline in information, and began to wantonly destroy and slaughter each other, accelerating this process. Over time, an extremely dark and selfish cosmic social environment was formed!"

Chang Wei's pupils widened and he exclaimed: "Dark Forest!!!"

The system ignored Chang Wei's exclamation and continued, "So, in a relatively stable universe, everything the host sees and the life he comes into contact with is in the three-dimensional universe."

"Then...why does time only have one dimension?"

"Because if it were zero-dimensional, there would be no time, and nothing would change. If it were two-dimensional, it would lead to a closed time loop, which is the space-time paradox. Only one dimension can effectively guarantee the unidirectional flow of time, ensure that causality is not destroyed, and form a logical universe."

"Therefore, under the rules of the Great Dao, all the universes and time in the universe must be composed of exactly three spatial dimensions plus one temporal dimension in order to form a stable universe and for life and evolution to occur."

After listening to this, Chang Wei let out a long sigh, then pointedly prodded the system with a meaningful tone, "System, is this knowledge collected and organized by the system from the intelligence network established by the myriad worlds? What exactly is your purpose?"

The system was silent for a moment, then replied, "The host has insufficient permissions."