Not long after, when the three mecha hovered above the bottom of the cliff, what appeared in front of everyone's eyes was a snow-colored miserable white world.

Ten thousand bones ......!

Humans, beasts, birds, all kinds of white bones exposed after death, intertwined layer by layer, piled up......

This is a land of bones, and it is also a realm of death.

At the bottom of the cliff, it is a tower ladder to present the accumulation of various eras, at the bottom, is a thick layer of white bone powder-like knots, on the upper layer, is the huge fossil skeleton left by countless exotic animals, and on the top, there are scattered dry bones that are relatively close to the era, and at the top layer, there are even half-decomposed fresh corpses, there are birds, animals, and even a few human corpses.

Lu Fan counted the fresh human corpses lying at the bottom of the cliff, no more, no less, and they happened to be the eight missing people that Master Wang was talking about.

At this point, it is inferred that perhaps the miasma surging up the bottom of the cliff contains a psychedelic effect that makes people delirious, which is also a good explanation of the mystery of the sudden disappearance of eight exploration teams.

What kind of effect will the Yin Poison Gas accumulated by countless corpses on the 10,000-year-deep cliff and countless corpses, Lu Fan and the others can't delve into it, let alone have the idea of experiencing it themselves.

The cold and dry environment, the dead and dreary space, here, even plants are difficult to grow, and there may be some fungi that are difficult to detect with the naked eye, so that at the bottom of the cliff, in the eyes of Lu Fan's group of interstellar travelers, there is still a little bit of life, at least, the corpses that died here can still decay and be decomposed by fungi, which is far more lovely than the cold vacuum world.

In Su Mei's eyes, the bottom of the cliff is a real place where the cold is the most cloudy. It is the same as the legend that cultivates the Feng Shui Jedi of evil things.

The people who landed at the bottom of the cliff could still vaguely see the strong light that went straight to the sky. It shines out of a deep cave on the edge of the cliff not far away.

Geomagnetically refracting light waves?

This was Lu Fan's first reaction naturally formed in his mind when he saw the strong light source, and the feedback from the mental waves in the brain domain showed that the source of the strong light was precisely the deep underground hole they had explored.

The deep cave is not big, just at the corner of the cliff where Lu Fan and the others are hovering, it can be visually detected by the naked eye, and the entrance of the cave can only be three people in parallel. The mecha was very difficult to enter, which forced Lu Fan and them to change their plan.

"Master, if you break in, I'm afraid that the deep hole won't be able to withstand the destruction of external forces. Causing a collapse. ”

"Let's go out and walk, the deep hole is too long, and the mecha can't break through there."

Indeed, it is not realistic to let a mecha pass through a deep hole of hundreds of kilometers. Even if you use the particle light blade to dig out a passable road, this speed is undoubtedly uncomplimentary, not to mention. I also have to worry about whether it will cause a large-scale collapse and bury Lu Fan and his family.

The cave is a slope that descends gently. I don't know why, waiting for Lu Fan and the others to step inside. The intense light suddenly disappeared without a trace, as if it knew that there was an invasion from outsiders.

Eerie and dark, this is the environment that Lu Fan and his party are stepping on at this moment, turning on the lighting light on the biological protective suit, in the cave, only a distance of twenty meters can be seen.

The air seems to be condensed, and it is difficult for even light to penetrate it!

The strange phenomenon made it difficult for Lu Fan and them to explain why such a situation would occur, but it could only show that the air composition in the cave contained some tiny substances that Lu Fan and their eyes could not distinguish.

The cave that Lu Fan and they are passing through at the moment is in the underground rock formation, if there is a volcano in the depths, this can be explained, but the fact is that Lu Fan used the detection of the spirit waves of the brain domain to find that there were signs of volcanic energy riots in the depths of the cave.

Geothermal water vapor should not exist in the cave, besides, Lu Fan and his party saw a white light penetrating not long ago, projecting a strange picture. …,

Entering the cave, Lu Fan checked the composition and structure of the cave wall, and what he didn't expect was that the cave was made of hard stone and rock, which was integrated, and there were almost no cracks around it, that is to say, such a cave was not formed by changes in the earth's crust, and what could be explained could only be the upwelling of the sewing.

But the upwelling will leave a lot of traces of stone milk, and in the cave where Lu Fan stepped on, at least in front of him, there was no such thing as the existence of these things.

What is left for Lu Fan to guess is only an incredible possibility - artificial excavation!

Artificial passages that are about hundreds of kilometers deep and penetrate directly into the earth's mantle, this is fucking outrageous, regardless of the enormity of the project, at least with the technology of modern humans, it is difficult to do this.

Of course, Lu Fan also knew very well that what they were looking for should be the remnants of ancient civilization, Lisa. How could the things that Amur was guarding be ordinary?

Lisa. In the message that Amur brought to Lu Fan, he asked the descendants of the bloodline to explore the secret of the winged people, that is, the technological civilization of the first civilization.

What is the purpose of the winged people, who have carved an abyssal passage underground?

One mystery after another lingered in Lu Fan's mind, which also made him want to explore the answer!

What kind of great civilization is it to be able to single-handedly fight tens of thousands of silicon-based people in the starry sky? At the same time, he was also the creator of the interstellar zerg and mechanical civilization, and finally disappeared into this starry sky, where he didn't know.

Undoubtedly, the winged man left too many mysteries and countless incredibles.

As Lu Fan's home planet, Earth!

How many secrets are there? This is what Lu Fan needs to pursue, according to the age of the birth of the earth, the earth is undoubtedly just a nascent planet in its youth, and three generations of great civilizations have been born one after another, among them, is there anything peculiar? The most important thing is, what is the earth?

Perhaps, the mystery is at the end of the passage, and it is with this idea that Lu Fan urges the five girls to speed up.

The underground cave is not a one-way to the end, and there are many twists and turns in the places where Lu Fan and his people pass, but no matter how they change their direction, they continue to have an inclination angle of thirty degrees, and slowly descend.

Deeper and deeper, farther and farther, unconsciously, Lu Fan and the seven people have gone hundreds of kilometers deep into the underground stone and rock caves, and the passage has always been as far-reaching, dull and narrow space, and only the footsteps of Lu Fan and others can be heard echoing from time to time.

People, once they stay in this dark space for a long time, they will naturally have infinite reverie, and fortunately, Lu Fan and the others are not ordinary people, so they did not imagine the idea of making people go crazy.

Only Su Mei has already felt the negative emotions brought about by the long-term darkness, and people have begun to become restless, if it weren't for Lu Fan who seemed to be aware of Su Mei's abnormality, and turned around from time to time to comfort her with his hand, perhaps, Su Mei would have been overwhelmed and began to shout wildly.

The seven people kept high speed and crawled for about six hours before they reached the limit that Lu Fan could detect, one hundred and seventy kilometers underground, this is undoubtedly a rather terrifying depth, whether it is the consumption of human physical strength or the oppression of spirit, it is a cruel test.

Even a nervous character like Lu Fan, even crawling like ants in the unchanging passage, faintly felt an invisible depression.

At this moment, Lu Fan really admires the psychological endurance of those professional cave explorers, in such an oppressive space, if it is an ordinary person, there is really a possibility of mental collapse.

Eight hours passed, when Lu Fan had already carried one on his back and one in his arms, the long cave finally changed, and the portable detector carried by Hongyue had already discovered that if there was another bend ahead, it would be a flat and empty place. …,

Got to your destination? Undoubtedly, this is exciting news for Lu Fan and his colleagues.

What caught his eye was still dim, and the visual range of the portable illuminator was always obstructed by the mysterious substance in the air, so that Lu Fan and his party could only see the scene more than 20 meters in front of them.

A magnificent underground cave that does not know the depth and breadth of the cave appeared in front of Lu Fan's eyes, Lu Fan closed his eyes and silently reconnoitred for a moment, this is a huge cave with a height and width of thousands of kilometers, and the depth has reached a terrifying ten kilometers or so.

But what really made everyone feel terrifying was the rows of dark long boxes that appeared in Lu Fan's eyes under the lighting light.

These dense long boxes that extend into the darkness of the unknown depth, no matter how Lu Fan and Su Mei look at them, they look like a vessel for storing the dead-coffins!

Two meters long, half a meter square, the dark appearance is similar to the bronze structure, and it is also engraved with unknown complex patterns, tens of thousands of bronze coffins?

This is the incredible scene that is displayed in the eyes of Lu Fan and his colleagues!

Is it difficult to find this the site of a rare huge underground mausoleum?

Doubts always filled Lu Fan's mind......

Countless neatly arranged bronze coffins are quietly parked in the magnificent caves, I don't know the age, and I don't know who made them!

The shocking and gloomy scene, not to mention the worried Su Mei, even Lu Fan, felt that his scalp was numb for a while. I thought of the rows of white-clothed zombies with miserable white faces, and walked straight towards the unknown and mysterious place.

Undoubtedly, any ordinary person would think that this underground world is the entrance to an underworld, the starting place of the underworld, and a terrifying purgatory!

Hongyue slowly approached the nearest copper coffin, and gently knocked it with her hand, and with a crisp sound, the composition of the metal texture was undoubtedly revealed.

"Master, this is like a kind of cultivation pod!" Red Moon continued to caress the intricate patterns on it with her hand and said softly.

After hearing this, Lu Fan also stepped forward, and after only taking a few steps, he noticed the echo sound coming from under his feet, which was very dull, obviously not an ordinary texture.

Squatted down, opened the arm part of the biological protective suit, and touched the lower surface with his fingers, and a deep cold instantly passed to Lu Fan's hand.

It's metal ......!

Lu Fan took a closer look and found that the ground was covered with tiny lines, which looked like an electronic circuit...... (Your support is my biggest motivation.) )