Underground world of the moon.

In the underground space of the main mining base, located in the deep mine shaft directly leading to the moon surface at the center, suddenly "pop" like a waterfall, silver liquid metal poured out!

These are the mechanical worms weighing about 500 tons separated by Nie Yun. They dredged and leveled along the mine all the way. At this moment, they finally completed the task and arrived at this underground base.

This means ... Nie Yun's energy crystal for underground space is about to enter the stage of large-scale mining!

After a large amount of liquid metal fell to the ground, it immediately turned into nearly ten thousand small robots, and began to drill into the corners of the core area of ​​the base with small short legs, repair equipment, replace parts, and upgrade mining technology.

The original ant robot production workshop was replaced by Nie Yun's small robot growth line, and the spherical mining vehicle manufacturing plant was restored and re-opened ...

After being silent for tens of thousands of years, this base has regained its breath of civilization!

The huge base covers an area of ​​hundreds of kilometers, and even if such a large number of robots enter it, it is like a mud cow entering the sea, occupying only a few key functional buildings and core areas, and then unable to expand and completely digest the resources in this base. I want to come for a while.

The restoration and reconstruction on the basis of the original base is much faster than Nie Yun ’s re-establishment of the same scale mining capacity. If the existing underground mining sub-bases are counted, this mining system left by the aliens will save Nie Cloud quite a lot of time.

The large amount of steel materials inside the base also provided sufficient engulfing material for the mechanical worms. Although the aging is a bit serious, it is like instant noodles that have been soaked for a long time. Except for the bad taste, Nie Yun said that the mechanical worms are not picky.

But the mechanical worm only eats steel. If you look at it from this angle, it will be too picky!

"You have to find a way to change your stinky problem in the future, your parents were used to it as a child!" Nie Yun expressed dissatisfaction with this feature of the mechanical bug.

Mechanical Bug: "..."

Nie Yun still has no definite conclusion as to why the mechanical worm only eats steel. At the current level of microscopic observation, even if using a scanning tunneling microscope with the largest magnification, it can only observe a single one by non-visual means at most atom.

However, the mechanical worms at the atomic nucleus have a diameter between 10-15m and 10-14m, and their volume only accounts for a few hundred billions of the atomic volume. Even at the speed of Nie Yun ’s technological development, it is not short-term to observe the nucleus. Can do it.

If it is said how to shorten this time, Nie Yun said that he can only look forward to visitors from afar, after all, no one is rich without wealth ...

...

Soon, the first batch of soil containing trace energy crystal particles was collected. They were directly put into a mechanical worm liquid pool. After the mechanical worms were decomposed and engulfed, ten minutes later, they slid out a side from the lower discharge port It is a cubic energy crystal that is only 1 cm long.

From the perspective of cutting and transportation and ease of use, the shape of the cube is undoubtedly the most suitable. Nie Yun has planned to use this type of energy crystal as a standard energy block used by his own machinery.

Despite its small size, the energy contained in it is comparable to a small nuclear fusion power plant. If it is mounted on a small robot, it can be operated at full power for thousands of years.

However, Nie Yun will not be extravagant enough to use this precious energy crystal in this small machine. This high-density energy substance can only show its true value in high-power weapons and equipment!

For example, just after obtaining the gravitational sub-technology, the core component of the gravitational bomb is installed with this energy crystal!

From the point of view of consumption, the gravity sub-collection device is still normal, but the energy consumed by the stand shield is simply an astronomical number!

Even if Nie Yun has the technology of miniaturization of nuclear fusion, if nuclear fusion is used instead of energy crystal to maintain the operation of this position shield for a long time, then the volume of fuel consumed alone is enough to fill the entire bomb.

From the perspective of interplanetary navigation, the quality of nuclear fuel that a space warship can carry is limited. If you encounter a battle, using a position shield can greatly improve the protection, but after a battle, your fuel reserve You have to consume seven, seven, eight, eight.

In this case, the endurance of the battleship will be greatly limited, and even a large logistics fleet will be required to follow long-range operations.

Look at the history of modern human technology development, from the coal of steam engines, to the fuel of internal combustion engines, to the electrical energy of the electrification era, and the era of nuclear power that has not yet fully arrived.

The stage of civilization's technological development has a close relationship with the energy materials currently used! Every industrial revolution can be said to be a large-scale popularization of new energy!

Judging from the structure of the gravitational bomb, this foreign malicious civilization not only possesses gravitational sub-technology, but also developed the technology of using energy crystal.

In addition, the civilization of the moon ruins civilization and the mechanical worm, Aris Civilization, have mining and internal records of such things as energy crystals.

This common point between the three shows that things like energy crystals are not uncommon in the universe! And it is also used by advanced civilization as an advanced energy source of nuclear energy.

In Nie Yun's view, the energy crystal ... is the new energy necessary for the interstellar age!

This kind of material cannot be parsed by mechanical worms, which means that it can hardly be manufactured by ordinary means. It is a non-renewable energy source. If you look at the oil war, you will know that if it is scarce, it will definitely become a human Cherish resources that people compete for!

To a certain extent, the reserves of energy crystals can greatly affect your potential for interstellar warfare.

Nie Yun saw the amazing development potential of this kind of thing, and he will step up the pace of mining. Even if he is ready to lose the solar system even if he loses the war, he must leave a nail here!

...

As the development of multiple bases on the moon gradually spread out, the recovery of two alien probe robots finally approached the goal!

Near the two Lagrangian points, the two micropropellers began to spray in the opposite direction, slowly decelerating close to the two detector wreckages.

As the distance between the two sides became closer and closer, the two thrusters began to deform and expand, and soon transformed into two film-like catch nets of about one kilometer.

20 kilometers ... 10 kilometers ... 5 kilometers ...

The distance between the two sides quickly approached. Eventually, the giant net contacted the wreckage. Under the action of inertia, the extremely tough capture net was hindered by the wreckage and rebounded directly.

Soon, the mechanical worms penetrated into the wreckage of the detector, visible to the naked eye, and a silver spot began to expand on the wreckage ...