"It's almost the limit here, let's go back." Nina would love to take him down to see it, but this was already the place where her authority could go deepest, and it was dangerous to go any further.

The super drilling plan is a future plan ahead of time, and there are still many places where you come here by feeling the stones, and a little mistake can ruin the whole plan, Nina also has to be cautious, don't look at her as if she is grinning, in fact, her heart is thinner than anyone else.

"When you get out, leave this garment with you, I haven't felt the heat yet, it can go deeper, it will definitely help your research." Mark tugged at his hazmat suit.

"That's great, but I think it's better to use it for industrial analysis, and it would be even more helpful if it could be mass-produced." Nina said.

"No way, if our technology could parse it, they wouldn't give it to me." Mark smiled wryly.

Nina reversed the direction of the cable car and returned in the direction they had come, passing by some characteristic formations, and the meaning of these formations would be shared with Mark.

"Antarctica can be said to be a natural geological museum, and the tectonics of the Antarctic underground have hardly changed since the last great geographical change, and the characteristics of purple-red shale, oolitic limestone, bamboo leaf limestone, and pure thick massive limestone from various ancient ages can be seen here." Nina gushed on and on when she said this, ignoring whether Mark could understand or not.

"Hmm, that's interesting."

"It feels like you're about to fall asleep...... Then let me tell you something interesting, in the former Soviet Union, probably where we are now, is the deepest depth that mankind has reached, and the big drilling at that time was abandoned due to lack of funds, but there is another way of saying it...... The local residents heard a terrible howl that night, supposedly from underground, and the sound was terrifying, as if it came from the bottomless abyss of hell, after which the drilling stopped, and it was rumored that terrible monsters had escaped at that time. Nina said as she lowered her voice and pretended to look terrified, and the sound of the wind around the cable car was the gas brought in with the underground shock water, and if she didn't know this, she might really think it was the cold wind from purgatory.

"You really like these god-to-god chatter." Mark said this, but there was a chill behind his back, and he unconsciously hugged his arms to his chest.

"Hahaha, because I'm a witch."

"Do you really believe it?"

"Of course I don't believe it, look at our feet, we are digging several times deeper than in the former Soviet Union, and we haven't dug to hell yet."

The two of them said that they had already passed a rope station, and the cable car entered it to self-check and cool down, and then continued to run up, and then passed through three such cable stations to reach the ground, just when the cable car entered the door, suddenly a strange roar came from above, at first Mark thought it was tinnitus caused by high pressure, but after a few seconds the sound came again, this time more obvious, and closer.

"Do you hear that? Or am I hallucinating? Mark looked down blankly, still glimpsing the endless darkness below through the dim light.

"I hear you, it's not right." Nina also noticed something was wrong, and Super Drilling was working all the time, but this time the sound was louder than usual, and the sound was thick and heavy, not at all like the sound of a drill bit.

"What do we do next?"

"Get out of here!" Nina pulled down the handle of the emergency drive, so that the cable car that had just entered the station started again, although it was a very dangerous operation, but the critical moment could not be taken care of so much, the piercing sharp friction sound at the foot of the cable car, the roar in the ears that seemed to come from the abyss did not stop, its frequency became faster and faster, like a distant and shocking war drum, close your eyes, you will have a strange illusion that the whole mountain is rushing towards you.

The speed of the cable car was not very fast, it took Mark and them at least two hours to come down, and it must have taken more time to go up, Mark looked at the drilling well below from time to time, the heat and pressure in the depths of the ground, even time seemed to become viscous, and every second became difficult to pass.

Nina started the cable car and dialed out the communication as fast as she could, but the communication signal seemed to be interfered with by something, and there was no way to call for help on the ground, and the headphones were filled with the snowflake noise of the TV, which together with the unknown roar and the noise of the drill bit formed an irritating trio.

Soon, however, something even more worrying happened, and one instrument was missing from the noise trio...... Super Drilling's bit set is out of action!

"Something must have happened." Nina shook her head in disbelief and said, "Otherwise, the drill won't stop easily, and we're in trouble." ”

"Is it too late to escape?"

"I can only try...... Nina gritted her teeth and reached out to lift the back cover of the cable car, forcefully ripped open the safety seal, sorted out the speed limiter in the mess of lines, and forcefully ripped it off.

The speed of the cable car increased a bit, but it also became wobbly, which was much larger than that of a roller coaster, and there was a loud metal crash on each section, which was the sound of the cable car's metal support, and it felt like it was going to fall and crash at any moment.

Even so, the ground above seemed so far away that it seemed as if it would never reach it......

Fortunately, at this time, a weak communication signal came, Nina was finally able to reluctantly contact the ground headquarters after continuous debugging, Mark took over the handle in her hand to control the cable car for her, the cable car that lost the speed limit is no longer so docile, and if it is not controlled well, it will collide or even crash directly, fortunately, Mark is a veteran driver, and there have been several times to avoid obstacles on the mountain wall.

"How's it going? What's going on? Seeing Nina hang up the communication, Mark hurriedly asked her about the situation, but there was something wrong with Nina's eyes, Mark saw fear in her eyes, a fear with despair, and her whole person collapsed on the seat as if she had lost her strength.

"The drill bit dug through an undetected underground fault, and there was a fusing of the rock formation underground, and a large amount of magma seeped into the bottom of the borehole...... It must be caused by active volcanic activity, anyway...... We're running out of time. ”