The Lunar Underworld.

In the underground space of the main mining base, in the deep mine shaft in the center that leads directly to the moon's surface, suddenly "poof" like a waterfall, and silver liquid metal poured out!

These are the mechanical insects that Nie Yun separated, weighing about 500 tons, and they went all the way along the mine to dredge and level the operation, and finally completed the task at this moment and arrived at this underground base.

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

A large amount of liquid metal immediately turned into nearly 10,000 small robots after landing, and began to drill into all corners of the core area of this base with small short legs, repairing equipment, replacing parts, and upgrading mining technology.

The original Ant Robot production workshop was replaced with Nie Yun's small robot growth line, and the spherical mining vehicle manufacturing plant was repaired and reopened......

After tens of thousands of years of silence, this base has regained the breath of civilization!

The huge base covers an area of hundreds of kilometers, and even if such a 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 it will be unable to expand, and it will be a while before the resources in this base are completely digested.

Repairing and renovating on the basis of the original base is much faster than Nie Yun re-establishing the same scale of mining capacity, and if you count the existing mining sub-bases underground, this mining system left by the aliens will save Nie Yun a lot of time.

And a large amount of steel materials inside the base also provide sufficient devouring materials for mechanical insects, although the aging is somewhat serious, but this is like instant noodles that have been soaked for a long time, except for the taste is not very good, Nie Yun said that mechanical insects are not picky eaters.

However, the mechanical bug only eats steel, and if you look at it from this point of view, then it is a bit too picky!

"In the future, I have to find a way to change your stinky problem, which was used to by your parents when you were a child!" Nie Yun expressed dissatisfaction with this characteristic of the mechanical bug.

Robotic Bug: "......"

As for why mechanical insects only eat steel, Nie Yun still does not have a definite conclusion, with the current level of microscopic observation, even if it uses a scanning tunneling microscope with the largest magnification, it can only observe a single atom by non-visual means at most.

However, the atomic nucleus-level mechanical worm has a diameter of 10-15m~10-14m, and its volume only accounts for hundreds of billions of the volume of the atom.

If we talk about how to shorten this time, Nie Yun said that he can only look forward to visitors from afar, after all, no one has a windfall and is not rich......

……

Soon, the first batch of soil containing trace energy crystal particles was collected, and they were directly thrown into a liquid pool of mechanical insects, which were decomposed and devoured by mechanical insects, and ten minutes later, a cubic energy crystal with a side length of only 1 cm was slid out of the discharge port below.

From the point of view of cutting, transportation, and ease of use, the shape of the cube is undoubtedly the most suitable, and Nie Yun has already planned to use this specification of energy crystal as a standard energy block for the machinery under his command.

Although small, it contains as much energy as a small nuclear fusion power station, and if installed in a small robot, it can run at full power for thousands of years.

However, Nie Yun naturally wouldn't have the luxury of using this precious energy crystal on this kind of small machinery, this kind of high-density energy substance, only with high-power weapons and equipment, can reflect its true value!

For example, the graviton technology has just been obtained, and the core components of the gravitational bomb are indeed installed with this energy crystal!

In terms of consumption, the graviton harvesting device is quite normal, but the energy required for the Stance Shield is simply astronomical!

Even if Nie Yun had the technology to miniaturize nuclear fusion, if he used nuclear fusion instead of energy crystals to keep this shield running for a long time, then the volume of fuel consumed alone would be enough to fill the entire bomb.

If from the perspective of interstellar navigation, the quality of nuclear fuel that a space battleship can carry is limited, if there is a battle, even if the protection can be greatly improved by using the Stance Shield, but after a battle, your fuel reserves will have to be consumed.

In this case, the endurance and combat capability of the warship will be greatly limited, and even a large logistics fleet will be required to follow it to fight long-range.

Take a look at the history of modern human science and technology, from coal for steam engines, to fuel oil for internal combustion engines, to electric energy in the era of electrification, and the era of nuclear energy that has not yet fully arrived.

The stage of scientific and technological development of civilization is closely related to the energy and matter currently being 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 alien malicious civilization not only has graviton technology, but also has developed the use of energy crystal technology.

In addition, the Lunar Relic Civilization and the Iris Civilization, the maker of mechanical bugs, both have mining and internal records of things like energy crystals.

This common denominator of the three shows that things like energy crystals are not uncommon in the universe! It is also used by advanced civilizations as an advanced energy source for nuclear energy.

In Nie Yun's opinion, the energy crystal ...... It is a necessary new energy for the interstellar era!

This kind of substance can't even be analyzed by mechanical insects, which means that it is almost impossible to make by ordinary means, and it belongs to non-renewable energy.

Then, to a certain extent, the amount of energy crystal reserves can greatly affect your interstellar war potential.

It is precisely because Nie Yun sees the amazing development potential of this kind of thing that he will step up the pace of mining, and even be prepared to leave a nail here even if he loses the war and loses the solar system!

……

Just as the development of multiple bases on the moon is gradually rolling out, the recovery mechanical worms of the two alien probes are finally approaching their goals!

Near the two Lagrangian points, two miniature thrusters began to jet in the opposite direction, slowly slowing down to approach the wreckage of the two probes.

As the two sides got closer and closer, the two thrusters began to deform and expand, and soon transformed into two film-like nets of about a kilometer.

20 km ...... 10 km ...... 5 km ......

The distance between the two sides approached rapidly, and finally, the giant net came into contact with the wreckage, and under the action of inertia, the extremely tough capture net was hindered by the wreckage and directly rebounded and wound up, wrapping several pieces of wreckage layer by layer.

Soon, the robotic bugs burrowed into the remains of the detector, and a silver spot visible to the naked eye began to expand over the remains......