Lin Xiao continued: "This civilization has a very high level of technology, and it is also extremely developed in terms of biological genetics. Later, they tried to combine man and beast, wanting humans to have some ability to fly or walk animals, or ...... Life span. In the beginning, they failed countless times until ...... The appearance of Nuwa. ”

Lin Xiao glanced at 11 and continued: "In today's words, Nuwa is actually a great biogenetics genetic engineer. She was the first person to successfully combine human genes with snake genes and breed a new life form race, so later generations gave her the image of half-human and half-snake, and called her the mother of life. Actually, these are all right, but what she created was not a human being, but a ......" Lin Xiao pointed to the basin in front of him and said, "Them." ”

"Nuwa's success laid the beginning of a new life form, and on her basis, this technology was constantly improved, and one new form of life race after another was created and cultivated. In order to better observe the strengths and weaknesses of these new forms of life and their growth, the Third Civilization built this experimental area in the center of the earth. And where we are now is the biological observation area of this experimental area. The main purpose is to simulate the normal ecological environment and observe the growth of the creatures living here. After a pause, Lin Xiao said again: "Later, an extinction catastrophe came, and the people of the Third Civilization evacuated the earth, because this relic was built in the space deep in the center of the earth, so it was preserved in that extinction global catastrophe, and has been operating autonomously for countless years. ”

11 frowned and asked, "Is the earth really hollow?"

"Yes. Lin Xiao nodded and said, "The theory of earth hollowness is correct. Have you heard of Korah Drilling?"

11 Nodding, the Kola drilling was the deepest in the world, at a depth of nearly 13,000 kilometers, from its start-up in 1970 to its abrupt halt in 1994. It is said that the reason for the abandonment of the project was that a huge cavity appeared when it was drilled more than 10,000 meters underground, and the pickup detected a sound coming from the ground, which was suspected to be countless people wailing and crying in misery.

"You mean......" 11 frowned, "that hole that Korra drilled through is the Inner World?"

"Yes. Lin Xiao nodded.

"What's the matter with that rumored cry?"

"I don't know. Lin Xiao said: "It may be the sound of the flow of air in the inner world, or it may be that there is a group of organisms living in the center of the earth, and the stones that fell when drilling through the rock formation brought disaster to "them". ”

11 Pouting, this explanation is really ...... I don't know what to say about it. But this can't be blamed on Lin Xiao, he hasn't been there to check, so naturally he can only rely on conjecture. It may sound ridiculous, but it's not necessarily true.

After a moment of silence, 11 asked again, "What about those monsters that have appeared on Earth at various times?"

"That's where I got out. Lin Xiao said: "There are many gates connecting to the surface of the earth in the entire experimental area, leading to the rest of the world. For example, there are several nodes in the Dragon Kingdom, as well as the Alps, Armenia, Coal Continent, Egypt and other places. However, it is usually closed, and unless it is opened artificially, it is generally impossible to find the node entrance outside, but it is much easier to get out from the inside. So occasionally, some creatures that live here will accidentally break into the node passage and run to the outside world, such as the mother body of the nine-tailed fox that follows you. ”

11 glanced at Lin Xiao, a little puzzled why he even knew about Xiaobai. However, he didn't ask any questions, but said, "So, the myths and demons that circulate around the world actually run out from here?"

"Yes. Lin Xiao nodded.

"And how are we going to get out of this place?"

Lin Xiao pointed to the sun above his head and said, "The sun here doesn't move, it's always fixed in one direction. Every once in a certain time it goes out, and that's night. It will light up again at a certain time, which is daytime. Go in the direction of the sun and you will find the end of this world. ”

What is at the end of the "world"? Is it a way out? Or is it nothing? Lin Xiao didn't say, and 11 didn't ask, at least he had a goal now.

……

"Cold ...... Cold night, this ...... That's what the hydra eats?" The monkey stared at in horror in the hollow underground.

Leng Ye's performance was not much better than him, and he was also shocked and inexplicably looking at the mountains of ...... in front of him Bones.

In front of them, there were countless piles of white bones, most of which looked like they were supposed to be human, and some of which were strangely deformed and untold of what kind of creatures. These countless corpses are piled up into a mountain, and all kinds of bones are stacked in a disorderly and disorderly manner, and they are even more boundless as far as the eye can see, like a vast ocean with no end in sight. It seems that even this world is made of these bones, which makes people feel creepy and weak in their legs just by looking at it.

No wonder Cold Night and the monkeys were scared, because there were so many bones here that it would take a lifetime to count them. As far as the eye can see, there are mountains of white bones.

"It should ...... Isn't it?" Leng Ye's face was also very ugly, and he whispered, "That thing is not so edible, is it? How many years does it take to eat this?"

The monkey took the flashlight and looked around, and the pillar of light shone nothing but bones. Swallowing his saliva, the monkey said, "I think this is probably where it excretes." ”

"Hehe......" Leng Yegan laughed twice, but the voice was really dry. In fact, he had the same conjecture as the monkey, but the idea was really creepy.

"It seems like there's no way out. The monkey turned his head to look at Leng Ye, and it happened that Leng Ye also looked at him, and the two of them looked at each other with big eyes, but they both looked at each other inquiringly.

"How to get there?" asked the monkey.

"Ask me?" said Leng Ye, pointing to his nose in astonishment.

"Or else?" I ask them?" said the monkey, shaking his flashlight at the pile of bones in front of him.

"Ugh. Leng Ye glanced back at the dark space behind him, hesitated, and asked, "Do you dare to go back?"

At the thought of the terrifying body of the hydra, the monkey shuddered, shook his head violently, and said, "Don't." ”

"Then we have to move forward. ”

"But there's no way ahead......"

"The way is made by man. Leng Ye patted him on the shoulder and said earnestly: "Young man, learn a little." ”

The monkey looked ahead: "Stepping on bones?"

"You can fly over too. ”

“……”