Yu Yifeng has always been very depressed in his heart.

Ever since falling below this cavern, this oppression has intensified, like a volcano about to erupt!

He shook his head slightly, forcibly suppressing the uneasiness.

Everyone leaves the option of survival to him, well, it's used to it, it's not a big deal. At least everyone obeyed discipline and saved a lot of trouble.

Now that people have walked for half an hour, the cave has become significantly narrower, and there are some large and small forks in the road, making it difficult to choose.

And if you go further, because the cave is too narrow, the large tracked vehicles are already difficult to pass, and they must be abandoned! This is a lot of survival materials, no matter how strong the load capacity of the power armor is, it can't be compared with the car.

But it's too close to the ship, and it's a very dangerous distance. If the engine does explode, this area will definitely be affected.

When the time comes...... If they weren't killed, they would have been buried alive!

Yu Yifeng is exchanging views with several geology experts, trying to figure out which is the real exit to the surface. If you wander around and get lost in this intricate labyrinth, it will be even more troublesome......

"In the experience of the earth, it is nothing more than feeling the direction of the wind and then looking for a real exit. Or look for a water source, go up the water source......"

"But this cave is too big, and there are air currents between the caves because of the imbalance in the distribution of heat and energy, so the plan on Earth simply won't work......," said one geologist, worried.

Other geographers and biologists are still shouting about how the cave was formed and so on.

Yu Yifeng didn't pay much attention to their discussion, as long as this group of people didn't leave the team without authorization, he didn't care.

They are scientists, always full of curiosity and exploration**, and it is for this reason that they insist on visiting Nix.

But usually, due to the existence of public security regulations, they are not allowed to go down to the cave to explore. It's a good thing that people are forced to fall into caves, and how can they not be excited to see so many strange creatures and strange geological features?

In other words, they think a little differently from ordinary people, and they all have a bit of a science fanaticism. It's like Archimedes in ancient Greece, the kind of person who has to engage in scientific research even if he dies......

If they can choose between "solving the ultimate theorem of the universe" and "eternal life", it is estimated that many people will really choose "solving the ultimate theorem of the universe"!

However, these scientists say that their bodies are still very honest.

The "ultimate theorem of the universe" has not yet been solved, and their lives still have to be preserved, and in such a dark place, following the collective is the smartest choice. No one wants to be lost in a cave alone.

Coupled with the fact that the soldiers were interspersed in the middle of the ranks, there was no chaos during this time.

At this pause, some people couldn't help but come up and make a report, saying that they wanted to capture some insect specimens to prepare for future research. This underground adventure was not easy to come by, and it is estimated that after finding the exit, the exploration operation will be put on hold for a long time......

They also fussed that "the discovery of these geothermal organisms could help improve human energy utilization......

It's a big deal! Because of the existence of Yu Yifeng's backbone, coupled with so many soldiers with loaded guns, this group of people has no pressure to survive, and they can say whatever they want.

Hearing this question raised by the scientists, Yu Yifeng shook his head and refused without thinking much about it, the uneasiness in his heart was very strong, how could he let them act without permission!

But these scientists kept begging, Yu Yifeng had to reluctantly agree, and sent a few soldiers to follow behind, so that they could move in a small area, and they could not leave the sight of the large army!

Several scientists left happily......

Yu Yifeng looked at their figures, and also sighed, he was worried now!

The roads that have appeared now are too narrow to pass through large tracked vehicles, so why should these cars be abandoned? Abandoning them is equivalent to abandoning a lot of survival materials!

“…… It's here to make the final supplies, and those who need to rest and eat are in a hurry. Half an hour later we set off! These cars are going to be abandoned here! ”

He finally made up his mind, and at the same time found a flat ground to sit down.

He placed a box of canned food into one of the grooves in the power armor and closed the metal lid on the surface.

The high-temperature steam emitted from the inside of the power armor will disinfect the surface of the iron can.

A few minutes later, a straw popped out of the helmet, and when he sucked hard, the jelly-like liquid food was sucked out, hot and a little sweet, but not very tasty.

Who else asked for so much at this time, this stuffed food can effectively replenish the water and nutrients needed by the human body, and there is no need to take off the helmet.

Yu Yifeng sat on the ground and saw several scientists happily collecting specimens, and his heart beat wildly.

This inexplicable feeling of uneasiness has reappeared, and it is getting closer and closer, as if it is right in front of you!

He didn't know what this feeling was all about, and after thinking about it for a long time to no avail, he could only attribute it to the cave itself. He grunted and ate all the jelly, discarding the metal can that had popped up again on the floor.

"Okay, let's ......"

He was just about to say to go, when suddenly he heard a buzzing sound, which was getting bigger and bigger, getting closer and closer......

"Be careful!"

Then, as if sensing something, several soldiers began to shoot in a panic at the entrance of the cave, pulling the scientist into a frenzied flight.

"Buzz", a black shadow like a small tornado suddenly emerged from the mouth of the cave!

In an instant, the people at the front of it were swept in!

In the sight of everyone, several people seemed to be wrapped in something, and directly turned into a black mass, and people writhed and twitched wildly inside one by one, trying to get rid of these black shadows. Everyone took a few steps back in shock, as if they were frozen.

The sense of danger in Yu Yifeng's heart had reached its limit, and he jumped up from the ground suddenly, finally seeing what this black thing was.

Pack...... Black bugs like locusts!

They weren't the size of a human pinch, but they were so ferocious that they clanged softly on the surface of the power armor.

Don't think that insects have no attack power, Yu Yifeng even heard the sound of something dissolving!

Although wearing a helmet and not smelling, it was clear that a corrosive gas began to spread in the air, and even a faint smoke appeared on the surface!

These acids are so strong that just a few gases can corrode the stone, not to mention the metal on the surface!

"Not good!"

Yu Yifeng screamed in his heart, he didn't know if the human superalloy could resist this inexplicable bug! The most important thing is that the power armor also has some weak points, especially the joints and other related connection parts!

He immediately shouted: "Hide in the car, hide in the car!" ”

"Zhao Yao, incendiary bombs! Use incendiary bombs! ”

Although he had a gun in his hand, he did not shoot. This high-performance machine gun is useless against a large number of bugs, and the best way to do it is to use incendiary grenades.

At this time, there was no way to think about it, these soldiers just acted in a panic as ordered, and with a "boom", several incendiary bombs were thrown next to the black cocoon.

Just a blazing tongue of fire splashed out in an instant!

Suddenly, a large number of bugs burned, and at the same time, the burning of these bugs also burst out of an even larger amount of acidic liquid.

A few of the fire men struggled to get up, and a few of them were still lying on the ground struggling, as if the power armor was damaged and they couldn't get up......

Yu Yifeng was anxious, he would never want to abandon these people like this.

He jerked out and yelled frantically behind him, "Flamethrower, quick! Spitfire! ”