"Penrose Steps?" The fat man was puzzled, and hurriedly said, "What kind of bird is this?" Fat man, I've never heard of it. After saying that, the fat man couldn't help but look into the dark tomb.

Everyone also stopped and stared at the small building.

Only Zhang Meng seems to have heard of this term: "You mean, this tomb road is not actually a tomb road, it is a trap in itself, and it is a difficult problem in the scientific community - the Penros Ladder!" ”

"That's right." Xiao Lou nodded and said, "That's right, we also call it the Soul Ladder in China." ”

Seeing that Xiaolou only said to Zhang Meng, the fat man was a little dissatisfied: "Hey, I said that you two can do it, what is the soul that is not suspended, don't make something that only the two of you can understand, tell me quickly, what is the difference between this ladder and a ghost hitting the wall?" ”

"Of course not." Xiao Lou explained: "Although the Penros Stairs will make people lose their way like ghosts hitting walls, it is easy to crack the ghost hitting the wall, as long as there is enough light and the goal is determined, you can get out of this dilemma." But the Penrose Ladder is different, a square staircase connected on four sides, each of which is upwards so that it can be extended indefinitely, and scientists call it: the impossible. ”

"If it's impossible to achieve it, how can there be a name?" The fat man asked.

Zhang Meng explained: "Although it is said that this is an impossible ladder, in fact, it has been mentioned in many Chinese historical materials, and it is recorded in the book as the Hanging Soul Ladder, which is said to be endless, all the way to hell. Although this design principle has been lost for thousands of years, there are still many foreign scientists who are obsessed with it, and even come to China not far away to find the existence of the Soul Ladder. ”

"Yes." Xiao Lou said: "This kind of four-sided staircase, in fact, one side is high, the other side is low, there will never be a www.biquge.info and end point of the Biqu Pavilion, as long as people fall into it, they will not be able to get out for the rest of their lives." ”

"Nima! It's such a hassle. After listening to Xiaolou's explanation to Zhang Meng, the fat man secretly said: "After talking for a long time, does it mean that even if we light all the wall lamps here, we won't be able to get out of this trap?" ”

"Hmm." Xiao Lou nodded.

Zhang Meng was also sad: "If this is really a soul ladder, theoretically we have entered a dead loop and will never be able to get out." ”

"Can't get out, so how did we get in?" The fat man did not believe.

"This ......" everyone is a meal, and they don't know what to say.

Quietly listening to the conversation between Zhang Meng and Xiaolou, Ye Jiu also glanced at the green bricks under his feet as if he had realized something. I saw that there is a very small height difference between each two green bricks, and as the tomb road gets longer and longer, the small will gradually enlarge.

"No wonder I always feel like I'm climbing and then downhill. At the time, I thought it was a delusion, but now it seems that it is not an illusion. Ye Jiu said.

"Alas, I can't buy regret medicine." The fat man sighed: "I'm afraid we can't get out if we want to." ”

"Nizi, third uncle, let me ask you, you really can't get out of this Soul Ladder?" Zhao San stared at Xiao Lou and asked, now the hope is all on Xiao Lou.

"Theoretically, there is no way to get out, but ......" Xiao Lou blinked: "We can find the entrance at the beginning and go back from there." ”

"It's hard to estimate!" The fat man pouted: "Just now I thought that the smoke was very strange, but now it seems that the mausoleum keeper is probably trying to use the smoke to attract our attention, and the other mausoleum keepers are taking the opportunity to block our way." Damn! I thought these bastards were careless just now, but I didn't expect them to be a chess master. ”

"And even if we can find the entrance we came, we won't be able to go back." "Don't forget," said the pheasant, "that hole has been collapsed, and it is estimated that it cannot be opened by the sapper shovel alone. ”

"You can't retreat." Zhang Meng pondered: "But I'm wondering, how did those tomb guards suddenly appear here when the tomb was blocked?" Since he was able to come and go freely in the ancient tomb, I think there must be a secret door in the tomb. ”

"Yes!" Being reminded by Zhang Meng like this, Ye Jiu nodded and said, "It seems that the mausoleum keeper brought us all the way to trap us with a ladder." ”

"Compared to the other steps, the Penrose Ladder is square." "So we can't start with the road itself. ”

"Since we can't start from the road, then we ......" Zhao San suddenly thought of something, and cast his eyes on the walls on both sides of the tomb: "It seems that the way to escape here is very likely to be on the walls on both sides of the tomb?" ”

In the face of Zhao San's words, everyone did not question it, they all nodded, and then cast their eyes on the tomb walls on both sides.

After a pause, the fat man took the lead and said: "Then what are you waiting for, let's do it together, knock on these walls, and see if there are any parts that are hollow, and there must be a secret door in the hollow place." ”

Seeing that the fat man picked up the torch on the ground again, Xiao Lou immediately stopped the fat man: "Put out the torch first." ”

"Why?" The fat man said puzzledly: "Anyway, since there is a secret door on the wall, the oxygen here should be able to circulate." ”

"Just in case, let's go out." Zhao San waved his hand: "Just keep the fire on my dry smoke pot." ”

"And since they can even create scientific miracles, I'm afraid there are other precautions, I'm afraid that when the light shines, they will be able to launch other traps, and then we will be in complete trouble."

Hearing Xiao Lou's reminder, the fat man hurriedly nodded and said, "Yes, yes, yes, if Xiao Lou hadn't reminded me, I would definitely have fallen for the other party." In this way, we will extinguish all the torches and walk slowly forward in the dark. ”

"In fact, in the dark, people's eyesight, hearing and even smell will be much stronger than usual. As long as we keep in mind the principle of the Panlos Ladder, there will not be much of a difference. Xiao Lou commanded.

As he spoke, the fat man had already extinguished the torch in his hand, and then devoted himself to solving the mystery of the Penros Ladder.