"How can there be a sense of déjà vu ...... the terracotta warriors?"

The rhizomes spread non-stop, allowing the rhizomes to run through and across the intervals between these cubes.

The roots of the rhizome extend out, and they skillfully burrow into the cube, carefully secreting the connecting proteins, reinforcing the cube itself, and cleaning away the dust and rocks that cover the surface.

In this way, the rhizome system grows and spreads at a constant rate while cleaning up the 'artifacts'.

After cleaning up those dust and rock blocks, the original appearance of the cube was presented in front of Huo Gu, two meters long, half a meter wide, and three meters high, this data is not absolutely accurate, the side length error between each cube is about one to three centimeters, and the material is the same as the metal wall, which may be the reason why the array can exist so completely for hundreds of millions of years.

It can be seen that the contents of this cube array are not the same as the cubes seen earlier, and in terms of appearance, these array cubes are more like tombstones.

There are countless lines on the surface of these repaired cubes, which are not naturally formed, nor is it that Huo Gu, an experienced guy, finally made a mistake, but the original lines of these cubes.

These lines are combined on the surface of the cube into geometric patterns of similar size, each pattern occupies an area of four centimeters square on the surface of the cube, and is arranged in neat rows, and between the geometric figures, scattered and interspersed with symbols composed of points.

Obviously, this is writing, an unidentified script that is completely different from human language.

"This should seem to have little to do with tombstones, more like the stone slabs in tombs that are dedicated to recording important information, that is, ......"

As far as Huo Gu could see, the entire array stretched as far as the eye could see, even if Huo Gu mediated the visual distance of his eyes, and its scale far exceeded that of any tomb group on Earth.

"It's a book?"

How can I keep my information longer?

This is quite a difficult thing to do, because in this universe, entropy is everywhere, and natural erosion will inevitably destroy the preserved readable information into undecipherable noise, the difference is nothing more than the length of time.

On Earth, there is only one way to preserve information on a time scale of hundreds of millions of years – to engrave words in stone.

It's not really a stone as a carrier of information, but a metaphor for 'inscribed information on some kind of solid that is extremely difficult to change'.

Obviously, the intelligent beings who burned words on the cube array in the first place thought of working with the humans of the earth, and that's why they made such a huge 'Book of Arrays'.

"It's a shame that I've never been very good at language decipherment."

Huo Gu stared at the words on the cube with greed but regret, although he was born in the archaeology major, but it focused more on improving the excavation skills of those cultural relics, if it was an ancient text of the history of the earth, it still had a little foundation to read the general meaning, but for the alien text without any foundation, it was really powerless.

Deciphering a completely unfamiliar language really requires a research team specializing in language and a national mainframe computer to do it.

Putting aside the matter of the cube array for the time being, Huo Gu shifted his attention to the rhizome that had been spreading in front of him, at this time, the rhizome finally spread out of the cube array, Huo Gu roughly calculated the size of the cube array, one hundred square kilometers, equivalent to the area of fourteen thousand football fields.

At the farther end of the cube array, Huo Gu could see two thin lines in the distance, like ropes between heaven and earth.

"Another column of sea?"

Huo Gu looked at his current distance from the previous water source, although it was still within the acceptable range, and it could be solved by expanding the delivery capacity, but since there were more supply points that could relieve the logistical pressure, it was naturally not a bad thing.

In order to conserve organic material, Hogu preferentially mulched the rhizome system to two distant thin lines.

However, this time the thin line made Huo Gu puzzled, the thin line became thicker in Huo Gu's field of vision, but the figure was still blurred, it seemed that there was still a considerable distance between them, and both thin lines were like this.

This anomaly, Hogu immediately noticed.

"Strange, could it be that the crack on the top layer is relatively large, and these two water columns are thicker than the previous one?"

The answer was soon revealed, and the spread of the rhizome continued, about forty kilometers away, finally extending the rhizome to the position of two pillars.

These two pillars are not columns of water, they don't even have anything to do with water, they are the pillars that support this huge underground cavern, a giant pillar with a diameter of one kilometer alone.

At the farther end of Hogu's current position, there are also thin vertical lines distributed on both sides, and it can be guessed that they are also support columns similar to the current position.

"The pillars here seem to be able to appear in the field of view frequently, so why can't you see any supporting pillars at the distance traveled before?"

So far, Hogu has traveled more than 370 kilometers, however, there is no giant support of similar support columns in this distance.

According to the current structure of the underground cavity, there should have been support columns on the distance that Huogu had passed, so the question is, where did those huge pillars go?

Just as Huo Gu was meditating, he inadvertently saw the cube array that had been completely occupied by the rhizome system, and suddenly he suddenly realized.

Obviously, the construction of such a huge array of cubes requires a huge amount of alloy that can support hundreds of millions of years, so where is the source of these materials?

It is impossible to dismantle the metal wall, because this is underground, and at that time, the possibility ball is still in a molten state, and the whole is a giant lava ball, and dismantling the metal wall is purely an act of seeking death.

Then only the support column of the same material is left, because the planet is still in a completely molten or semi-molten and semi-solid form, and the pressure cannot be as great as the underground pressure of a solid planet, so it makes sense.

"So, this underground cavity...... What is it? ”

Intelligent life makes a thing, and it is generally given a certain purpose in it, and like the underground hollow in the depths of Huogu, this kind of technology cannot be done even in the human world, this is already a big project at the level of civilization, so this hollow is by no means the product of the idle guy who is bored.

Not to mention the 'Book of Arrays', which covers an area of 100 square kilometers.

So what was the meaning of this place when it was first built?