In the fourth-level civilization stage, Xiao Yu had already found traces of the fast son in Shiyan, but he didn't know it at the time.

According to the normal process of scientific and technological development, it should be that with the development of science and technology, Xiao Yu gradually summed up the law of this phenomenon, and put forward his own hypothesis, and then verified them one by one.

In this process, it is also accompanied by the development of other technologies, such as energy technology, antimatter, dark matter related research. This is the progress of the entire scientific and technological level.

But now, Xiao Yu's rest of the related technologies have not advanced to a sufficient extent, and they have already known in advance that this is because of tachyons, so there is this inexplicable mass increase phenomenon. This is a good thing, which means that Xiao Yu can take many detours and greatly speed up his scientific and technological process.

Through this, Xiao Yu once again realized a truth. That is, the scientific and technological development of civilization is gradual. If Xiao Yu is still in the third-level civilization stage, then the information obtained so far will not be of much use to Xiao Yu. A civilization that has not even mastered the theory of curvature navigation and great unification, even if it knows about the existence of tachyons, what can it be used for?

In the current stage of the universe, there is no natural negative matter, all of them are artificially created. This is clearly documented in the scientific and technological literature of the Melian civilization.

It is an interesting process for tachyons to increase matter. In the process, there is a paradox. That is, since the total matter of the universe is eternally conserved, that is, the law of conservation of mass and energy. Then, the negative matter composed of tachyon and the positive matter annihilate each other, causing the mass of the positive matter to disappear from the universe. How can this phenomenon be explained?

You know, the total amount of matter in the universe is constant, so if you make a negative kilogram of negative matter, and then use it to react with positive matter, causing the total amount of matter in the universe to decrease by one kilogram, can this phenomenon happen?

Morian's answer was that this phenomenon could not happen. In the process of annihilation and annihilation of positive and negative matter, the total amount of matter is still conserved on the cosmic scale and the macroscopic time scale.

The answer is simple. Producing a kilogram of negative matter will harvest one kilogram of positive matter at the same time. The process of making negative matter is made by a kilogram of negative matter and a kilogram of positive matter, and the total mass of both is exactly zero. It does not break the law of conservation of mass and energy.

Moreover, negative substances cannot be stored for a long time. In a very short period of time, it reacts with the ubiquitous positive substance - regardless of the positive substance with which it reacts. Whether it's the positive matter it is associated with, or the positive matter in the rest of the universe, in short, it will always react with the rest of the positive matter after it is created.

This property makes it possible to make weapons. Like the cannons built on the planet's surface. Those cannons. It is the negative matter cannon, their power, Xiao Yu has already seen it, it is a huge power that can completely annihilate a provincial spaceship equipped with four maintenance covers in an instant.

Xiao Yu already knew how that giant cannon worked. First of all, in the ground equipment, a large number of negative mass tachyns are made, and after accumulating to a certain extent, they are shot at the target at once. Because it is faster-than-light, it is unstoppable and unwarned. If the negative matter cannons are powerful enough, they can even annihilate a star in an instant.

Let a star disappear in an instant, without any warning or movement, what a majestic divine power!

Moreover, from this characteristic of negative mass tachyons, Xiao Yu also sensed an amazing possibility. That is, the unlimited extraction of matter from the void.

The principle is very simple, since every kilogram of negative matter is manufactured, it will be accompanied by a kilogram of positive matter, so can it be launched immediately after the negative substance is manufactured, and the associated kilogram of positive matter is put into the decay engine, so that there is no unlimited energy?

This inference made Xiao Yu excited. If this idea is really feasible, Xiao Yu will no longer have to worry about the source of energy. However, Xiao Yu's excitement only lasted for a moment before disappearing. Because, Xiao Yu immediately thought that in the Galactic Encyclopedia, a common sense once mentioned, the real reason why civilizations of level 6 and below are confined to the river system and cannot sail across the river system is still energy limitations.

Even the powerful Taihao civilization, from the Big Magellanic Galaxy to the Milky Way, had to follow the Magellanic Stream, and relied on the material replenishment of the Magellanic Stream all the way to survive the distance of more than 100,000 light years. And the Milky Way, the nearest other river system, the Andromeda Galaxy, is more than two million light-years away.

From this, it can be inferred that since the fifth-level civilization has mastered the negative matter tachyon technology, the sixth-level civilization naturally has a deeper study of this, but the sixth-level civilization is still trapped in the river system, which proves that Xiao Yu's speculation is not feasible from another aspect.

Xiao Yu continued to browse through the scientific and technological documents from the Molian civilization, and soon found the answer: "In the process of making negative matter, every kilogram of matter obtained must be more than the energy that is greater than the energy that turns all the kilograms of matter into energy. ”

"I see." Xiao Yu was stunned. It's impossible not to consume extra energy, and it's impossible to extract the heat from a glass of 15 degrees of water to another glass of water with a temperature of 30 degrees. Because in this process, the input must be greater than the output.

This is the negative matter tachyon. Dark matter, on the other hand, is also detailed in the scientific documentation of the Murlian civilization.

Xiao Yu only now knows what dark matter is.

Dark matter is still matter, but it is not ordinary matter. In the age of the earth, mankind has been puzzled by this question for a long time. At that time, by observing the speed of the movement of galaxies within large clusters of galaxies, humans discovered a phenomenon that within these large clusters of galaxies, the speed of galaxies moving too fast. According to observations, these large clusters of galaxies are simply not massive enough to bind these high-speed galaxies unless they are a hundred times more massive than they are today.

Then there's an obvious problem. What is the unobservable substance? They can contribute gravitational attraction without emitting electromagnetic waves in any frequency band of their own, nor do they react with any electromagnetic waves. It seems that they don't contribute anything else except gravity.

In short, it is because of the discrepancy between the observations and the calculations that humans are aware of the existence of dark matter.

Now, Mo Lian Wenming answered this question for Xiao Yu.

The answer of the Merian civilization is that dark matter is a special form of positive matter, and within the elementary particles that make up dark matter, there is no strong interaction force, no weak interaction force, and no electromagnetic force, only gravity.

Without strong interactions, quarks cannot be aggregated into basic protons, neutrons and the like, matter cannot be formed, dark matter is all made up of quarks, they are "clouds" formed by quarks. Without electromagnetic force, photons can penetrate them unhindered, i.e., they are invisible and cannot be seen through radiation in any frequency band. Gravitational attraction means that they can still bend light, causing gravitational lensing that can be detected by humans.

Dark matter is ubiquitous in the universe. However, they do not have the characteristics of strong interaction force and electromagnetic force, which determines that they cannot participate in the decay of the elements and convert them into energy, that is, they cannot be utilized. Because the basic principle of elemental decay is to produce energy by manipulating strong interaction forces and electromagnetic forces to cause collisions between quarks.

Dark matter, which seems to be an incomplete evolutionary matter. In the course of their evolution, they seem to have evolved only gravity, but not the other three fundamental forces.

This conclusion made Xiao Yu feel a little regretful. If this ubiquitous dark matter in the universe can be harnessed, then the energy problem that restricts millions of light-years of voyages across river systems will be solved.

The scientific documentation of the Murlian civilization also suggests that there is some kind of magical connection between dark matter and antimatter, and negative matter acts as the link of this magical connection. When negative matter and ordinary matter meet, both will be annihilated, and when negative matter and antimatter meet, after a part of the mass of the antimatter is annihilated, the other part of the mass will be transformed into dark matter, which is a "broken" substance.

"The four substances in the universe are like this...... If I didn't have these scientific and technological documents from the Merian civilization, but just my own research, it would have taken me at least a thousand years to obtain this knowledge. It seems that war and plunder are indeed the best way to promote the development of civilization. ”

Among the mechanical storage devices of the Melian civilization, there is not a lot of information about science and technology, and many of them are incomplete. As a result, although Xiao Yu can grasp these conclusions, he cannot know the derivation process, various formulas, and so on. These things just pointed out a way forward for Xiao Yu, so that Xiao Yu could consume thousands of years of development time. The specific research work has to be done by Xiao Yu himself.

For example, before Einstein appeared, giving the formula E=MC^2 to the scientists at that time, and explaining the meaning of this formula, did not make much sense for the advancement of science, because the derivation process of this formula was missing. "weishenme is the result" is much more important than "what the result is".

But this can at least point out a research direction for those scientists and save them a lot of energy and time, just like Xiao Yu now. (To be continued......)