Xiao Yu knew about such a thing as the primordial black hole, but before Xiao Yu just regarded the primordial black hole as something no different from ordinary black holes, and didn't pay special attention to it - even if it was the primordial black hole, wasn't it also a black hole? The same has the horizon boundary, has angular momentum, mass and charge and other indicators.

But at this moment, after getting this information from the Mechanical Civilization Group, Xiao Yu knew the difference between the primordial black hole and the ordinary black hole. These differences made Xiao Yu understand that the primordial black hole was very important to him.

"The Big Bang, no, it should be called the first time in the universe that the primordial black hole was the first star to appear. The nature of a black hole means that it only allows matter or information to enter, but not to leave it. Excluding the primordial black hole, which was destroyed by the explosion of the black hole due to the information storm, the primordial black hole that has survived to the present day must hide many mysteries from the time when the rules first appeared. What exactly are the rules, and what is the essence of the rules, perhaps the answer can really be found in the primordial black hole. Xiao Yu thought silently.

From the outside, there is no difference between primordial black holes and ordinary black holes. There are more than 10 million black holes in the universe, so how to distinguish the primordial black hole from these 10 million black holes? Xiao Yu can't just see a black hole and run over to analyze it. Even if Xiao Yu had this energy, Xiao Yu would not do this.

Then, Xiao Yu must have a benchmark to distinguish the primordial black hole from the ordinary black hole.

There is a very trustworthy benchmark in front of Xiao Yu, and that is the quality of black holes. Take twice the mass of the Sun and 10 billion times the mass of the Sun as the dividing line. Any black hole with a mass within this range has a very high probability that it is not a primordial black hole, but an ordinary stellar black hole or an aggregate black hole formed by the collision and fusion of many stellar black holes. And the quality is not in this range. That is, a black hole that is less than twice the mass of the sun, or more than 10 billion times the mass of the sun, has an extremely high probability of being a primordial black hole.

But there are exceptions. Black holes will continuously reduce their mass through Hawking radiation, and Hawking radiation is inversely proportional to mass, that is, the greater the mass of the black hole, the slower the Hawking radiation loses mass, and vice versa. This leads to: The primordial black hole, which is below a certain mass, has disappeared into the universe due to Hawking radiation. After calculation, Xiao Yu knew that this quality standard was about 100 million tons. The radius of the event horizon of such a black hole is less than one femtometer. That's smaller than an atom. If Xiao Yu really found this tiny black hole, it could only prove one thing, this was not a primordial black hole, but a certain intelligent civilization created it.

By measuring the mass of the black hole, Xiao Yu can greatly narrow the scope of his search. And measuring the mass of a black hole is an extremely simple thing for Xiao Yu.

Xiao Yu didn't know how many primordial black holes there were in this three-dimensional universe. But I think it's not too small. And Xiao Yu also has the most powerful weapon to find the primordial black hole. own seed network that is constantly expanding.

After Xiao Yu got this information from the Mechanical Civilization Group. Xiao Yu has already launched his own seed network. The seeds in the seed network are built using the technological ideas of mechanical civilization, and these tiny particles can not only continuously replicate themselves, but they can also be aggregated together to form any machinery and instruments that Xiao Yu wants. At present, they have been combined with each other into countless tiny gravitational measuring instruments and optical observation instruments, as well as radio waves and space observation instruments. Gravimetric instruments can measure the gravitational strength of an area, and optical instruments can measure the mass of visible matter in that area, and compare this data with the data observed by the gravitational observation instrument. If the data from both parties do not match, it is likely that there is an invisible black hole in that region.

Besides. Optical observation instruments can also be used to see if a black hole exists through optical effects such as gravitational lensing. Radio observation instruments can look for black holes by observing the intensity and changes of rays in a certain region. Space observation instruments look for traces of black holes through changes at the spatial level.

Xiao Yu believes that under the search of his seed network, any black hole, no matter how small it is or how hidden it is, will eventually be found by himself. As long as the black hole is found, then the next step is to measure the mass of the black hole to confirm whether it is worth continuing to observe. If there is, make further observations, and if not, number the black hole and abandon it, and no more instruments will waste resources on it.

So far, Xiao Yu's seed network has spread to nearly 100 million light years away, and Xiao Yu has carried out close search activities in this spatial scale. Moreover, Xiao Yu's fleet is still advancing, and the scope of the seed network continues to spread. Xiao Yu's search for the primordial black hole will become more and more efficient.

In addition to searching for the primordial black hole, Xiao Yu still has a lot to do. At present, the most urgent thing is to absorb and digest the vast amount of scientific and technological information harvested from the more than eighty eighth-level civilizations of the Mechanical Civilization Group. The eighth-level civilizations in the mechanical civilization group cover almost all types of eighth-level civilizations in the universe. Being able to become an eighth-level civilization has already proved that this civilization has developed technology in this direction to the limit and even to the point of coming into contact with the rules. After absorbing and digesting these scientific and technological materials, Xiao Yu will become the most top-level eighth-level civilization with real all-round development.

Whether it is architecture, music, microcosm, macrocosm, the universe or extreme stars, Xiao Yu all have the most profound attainments. And after smelting all these technologies into one furnace, the power they burst out will be far from being as simple as one plus one. Although he still can't become a ninth-level civilization, Xiao Yu's strength will still improve a lot.

"Come to think of it, after I have all this scientific and technological information, even the rebel camp, if they don't have a logical weapon, they will no longer be my opponents." Xiao Yu stood in front of the porthole of the Human spaceship, looking at the endless dark universe outside the window lightly, thinking lightly.

There was a strange black sphere slowly rotating in Xiao Yu's hand. This black sphere undoubtedly possessed an extremely strong gravitational pull, but it was extremely docile in Xiao Yu's palm. It floated in the air above Xiao Yu's palm, quietly.

It's a black hole, a small black hole. It has a visual range of about seven centimeters. The seven-centimeter event horizon radius means that the mass of this black hole is about 472 trillion tons, which is about eight times the mass of the Earth.

At this moment, Xiao Yu took the eight earths in his own hands like this. After breaking away from the computer and fusing the musical civilization, Xiao Yu's body already has the strength of an eighth-level peak beast. Doing this with the strength of an eighth-level peak beast is nothing, and it can even be said to be a very simple thing.

The mass of this black hole is not within the range delineated by Xiao Yu, which means that it may be a primordial black hole. And in fact, through analysis, Xiao Yu also confirmed this. This is a primordial black hole found by Xiao Yu's vast seed network in a medium vortex river system about three million light-years away from Xiao Yu at this moment. After finding this primordial black hole, the seeds in the seed network were immediately combined into a stargate instrument, which was sent to Xiao Yu as quickly as possible, so that Xiao Yu could carry out follow-up research.

"This is the primordial black hole, born more than 10 billion years ago, born together with the rules of our universe, and witnessed the development of our three-dimensional universe to what it is today. In a sense, it's the same age as our universe. Xiao Yu lowered his head, looked at the small black hole in his hand attentively, and thought silently.

Xiao Yu perceived many things that had nothing to do with science from this primordial black hole, such as vicissitudes and antiquity. Millions of years in a hurry, in the eyes of this primordial black hole, are just fleeting. Time, for which it seems to be meaningless.

When the rules of the universe were first born, it may have been because the density of matter in a certain region was so high that they did not have the opportunity of nuclear fusion or star explosion, but directly merged into such a black hole. It may not have been too lucky, at least, it didn't find enough food for the next 13 billion years or so. Otherwise, it wouldn't have maintained its tiny size.

Xiao Yu's hand moved slightly, and immediately, the horizon boundary of this black hole began to shrink continuously. Apparently, the speed of light around this black hole has been raised. As the speed of light increases, as the size of the black hole continues to shrink, some things that have been hidden inside the black hole and have not been exposed to the outside for more than 13 billion years have been released. Those things are amazing, even Xiao Yu can't fully understand these things. Xiao Yu knew that these things were probably the things he was looking for.

But these things are not complete. Moreover, inside this primordial black hole, in addition to these key things, there are many useless cluttered things. It could be a ray of light, or a piece of information, or a speck of cosmic dust swallowed by this black hole by chance. These things are a testimony to the long time that this primordial black hole has gone through since its formation. They never had a chance to see the light of day again, but now, they were all presented in front of Xiao Yu. (To be continued......)