Professor Zheng is engaged in children's science education, and the content of his lectures is so simple that even children can understand it.

Chu Ge and Shi Meng naturally suddenly realized.

Although it is difficult for the small palace master to adapt to concepts such as "two-dimensional, three-dimensional", he can understand five or six percent after a little thought.

"Psionic energy is to us humans what a flame approaching from above is to a creature on a two-dimensional plane."

Professor Cheng continued, "Fortunately, unlike the 'two-dimensional little ants', humans living in the three-dimensional world have sophisticated logical deduction skills and rich imagination, which help us break through the limitations of dimensions and roughly understand a 'high-level energy source that is slowly approaching on a four-dimensional level'.

"What is the essence of psionic energy, no one can say clearly, only that it does not follow the physical, chemical, and biological laws of the three-dimensional universe, but from the four-dimensional space, a higher level.

"In the three-dimensional universe, all energy and even matter, in the final analysis, is a combination of the four fundamental forces, and they are all string disturbances, and if we want to split or merge an atom, it is difficult to ascend to the sky.

"However, under the intervention of the laws and energy of the four-dimensional space, it is easy to pluck the 'strings' hidden in the deepest part of the three-dimensional matter, and even distort the four fundamental forces, splitting or merging atoms, thus generating a powerful and endless force.

"Psionic energy invades metals, which can change the molecular and even atomic structure of metals, turning them into 'crystals'.

"The introduction of spiritual energy into the human body can change human cells and even gene chains, making human cells show a certain 'four-dimensional' quality, making the original double helix entwined gene chain into various forms that are extremely distorted.

"Spiritual energy surrounds the human body, induces the magnetic field of heaven and earth, and can even temporarily distort the constants of the four basic forces, causing gravity to disappear or strengthen, and evolve many magical powers that fill mountains and seas, and move the stars."

With Professor Zheng's introduction, light and shadow intertwined behind him, and a large number of popular science images appeared.

Some of the images are under a microscope, observing the veins of metal infected with psionic energy, gradually appearing strange crystals and completely turning into another substance.

Some of the images are human cells, after encountering a highly concentrated psionic solution, they seem to become instantly cancerous, becoming huge and exploding.

Going deeper, sure enough, the gene chain of the double helix gave birth to the branches of Yaya's fork, and countless sleeping gene fragments were awakened one after another.

Under the entanglement of aura, human beings, vehicles, and even mountains are suspended in mid-air, presenting an extremely strange state of "anti-gravity", which is difficult to explain with the physical laws of the three-dimensional universe, but if the higher laws of the four-dimensional space can distort the four basic forces, everything makes sense.

Chu Ge and Shi Meng glanced at each other, and they both saw the surprise and confusion in each other's eyes.

"Of course, our current research on psionic energy is still in its infancy, after all, in the past thousand years or even longer, the earth has been in the ebb stage of aura, and the entire three-dimensional universe is relatively closed, rarely disturbed by aura."

Professor Zheng smiled, "In this regard, the Immortal Cultivation Realm and the Illusion Realm are far ahead of us. ”

Shi Meng was anxious, and when he heard this, he couldn't help but ask, "Why, there are still high tides and low tides in spiritual energy?" ”

Professor Zheng's light and shadow froze for a moment.

It seems that according to the keywords thrown by Shi Meng, the corresponding answers in the database are searched.

Soon, he found the answer.

"There are countless hypotheses about the rise and fall of the tide of spiritual energy, and now the earthlings' research on spiritual energy and high-dimensional space has just begun, and I don't know which hypothesis can perfectly explain the cause of spiritual energy revival.

Professor Zheng said, holding a newspaper in both hands, flat on top of the map of the earth.

The overhead light was blocked by the newspaper, making it difficult to penetrate the past, and the map of the earth became dim, and the two-dimensional ants crawling slowly on it became more and more sluggish and clumsy.

"There is a hypothesis, called the 'dark cloud theory', that from the concept of four-dimensional space, the earth has been walking through a huge interstellar dust for thousands of years, and with the current technology, the existence of this dust cannot be observed, but it firmly blocks and absorbs most of the spiritual energy, just like the dark clouds obscuring the sun, making the earth has been in a bleak state of 'continuous rain'."

Professor Zheng said, "Fortunately, from the recent signs, the earth is slowly getting rid of this 'dark cloud' after thousands of years, and is about to usher in the most brilliant psionic age, at least, now-"

Professor Zheng tore his hands lightly, and several cracks were suddenly torn open in the newspaper, and the light shone into the cracks, leaving bright light streaks on the map of the earth.

"We have discovered countless spatial gaps, and the spiritual energy flowing from these gaps is enough to set off an evolutionary wave in our world."

Professor Zheng continued, "Although there are various problems with the 'dark cloud theory', it is indeed the most able to explain the emergence of 'spatial gaps', so it has been recognized by many experts and scholars.

"In addition to the 'dark cloud theory', there is also the 'orbiting theory', which holds that just as in the three-dimensional universe, the earth orbits the sun, with the change of orbit and angle, there are spring, summer, autumn and winter, in the concept of four-dimensional space, the earth and even the entire solar system also orbit around a huge and mysterious energy source, but its orbital period is measured in thousands or even ten thousand years.

"In the last 10,000 years, the earth and even the entire solar system were in a long and harsh winter, and it was difficult to draw enough energy from this energy source, but now, the change of orbit and angle has made the harsh winter pass, spring flowers bloom, and even the hot summer is coming.

"Similarly, there are many worried experts and scholars who firmly believe in the 'surrounding theory', and believe that in today's 'spring blossoms', spiritual energy has caused such a major change to our civilization, and I don't know how unrecognizable the earth's civilization will become in the real 'hot summer', so we must take precautions and prepare early, otherwise, the entire civilization will usher in a catastrophe - a more tragic catastrophe than the attack of the immortal cultivation world and the illusion world."

When Chu Ge and Shi Meng heard this, they couldn't help but clench their fists.

Indeed, even if immortal cultivators and magicians are enemies, at least they are imaginable enemies, everyone is really fighting hard, and they don't know who will kill the deer!

But what the concept of "hot summer in the four-dimensional space" is, no one really knows, and there is no way to prevent it.

You must know that as soon as the aura was revived, an ambitious person like the "Colonel" Ning Lie was born, as well as all kinds of vicious bandits, who cobbled together the "Heavenly and Human Organization" to cause all kinds of destruction.

If the concentration of aura is increased tenfold, will the human civilization on the earth still be able to maintain its current appearance?

"Neither the 'dark clouds' nor the 'surrounding' theory are the most terrible hypotheses, and there is an even more absurd, darker and more desperate hypothesis that can explain the rise and fall of the psionic tides, and that is the 'match theory', remember the match I just struck?"

Professor Cheng set aside the tattered newspaper, took another match, and lit it with a light stroke.

Professor Zheng placed the burning match on top of the map of the earth, and the two-dimensional ants felt the light and heat and became active again.

"Look, for these two-dimensional little ants, now is the 'aura revival'." Professor Cheng said with a smile, but his smile was full of deep worry and doubt.

Soon, the match burned to his fingertips, and Professor Zheng shook his hand and blew out the flames.

"Now, the world of the two-dimensional little ants has fallen into a dark age of depleted psionic energy."

Professor Zheng said, pulling out a third match from the matchbox and making a gesture to light it, "As long as I light one more match, the world of the two-dimensional little ants will be full of life, warm light and heat, hope and a future - but they will never know, and they will not be able to interfere, whether I will light this match or not, will I?"

"So, the meaning of 'match theory' is that in the four-dimensional space, there is also intelligent life that we cannot imagine, no, the use of 'wisdom' and 'life' is not enough to explain the essence of this existence, in short, in the four-dimensional space, there is also some kind of existence, holding a 'match', for some reason that we can never understand, constantly igniting, approaching, or blowing out, far away.

"Of course, this hypothesis has no basis in the slightest, and many experts and scholars believe that it is just an ethereal myth, a pretended astonishment, and it has no value for research.

Chu Ge and Shi Meng felt chills when they heard this.

The little palace master heard that his eyes were wide open, his breathing was short, and he had goosebumps.

Compared with Chu Ge and Shi Meng, who have received atheistic education since childhood, the little palace master who grew up in the immortal cultivation world since he was a child is indeed more likely to believe in "gods and demons of higher dimensions", such an argument.

Chu Ge shook his head and threw out his fearful imagination.

Whether it is "dark cloud theory", "surround theory" or "match theory", after all, they are too far away and should be a matter of concern to top scientists.

Time is limited, so it would be better for them to learn more about specific and practical issues.

"Professor Zheng, may I ask, why is the concentration of aura in the Immortal Cultivation Realm and the Illusion Realm so much higher than that of the Earth, and besides, there are a large number of artificial teleportation arrays and natural spatial gaps between the Three Realms, which can be worn back and forth with each other, and each other's language, race, and customs seem to have a subtle connection, what is going on?"

Chu Ge glanced at the little palace master and couldn't wait to ask, "Immortal cultivators and magicians, as well as ordinary people in the local area, are they considered standard human beings, or are they some kind of ...... What about aliens? ”