"That means the ancients have already seen those two creatures?"

"It should be, otherwise how could it be so coincidental that there would be such a thing drawn in an ancient map? And the ancient tomb of Mawangdui is also buried here, maybe the two really have something to do with each other. ”

"But I still don't believe that in ancient times, there was no electricity, no lights, and there was not enough food and space to move around, how could they dig out a city out of thin air."

Xie Yunhao's stubbornness came up, but he still didn't want to believe all this.

At this time, Li Yan stepped forward and explained:

"Maybe this underground space isn't what they're digging into?"

"Then even if there is a huge cave, it is impossible that they have been living underground for more than 2,000 years, and no one has seen them again for 2,000 years, and they have not returned to the surface until today?"

"It's not necessarily a cave, about 600 million years ago, Tanzhou was a vast sea. Later, the sea gradually withdrew from east to west, and most of Liuyang, Tanzhou and Wangcheng rose out of the sea and became the northwest edge of the ancient land in the south of the Yangtze River. About 140 million years ago, the sea flooding in the Tanzhou area ended, and it rose to the land, and due to the influence of crustal movement and geological structure, a long intermountain depression basin - Changping Basin was formed. At the beginning of the Cenozoic Era, the entire Changping Basin rose to land. About 3.5 million years ago, there was a third glacial age on the earth, and there are still glacial landform relics in Liuyang. According to archaeological judgment, in the Paleolithic Age, 15-200,000 years ago, there were primitive human activities in the Changsha area. In the Neolithic period, clans and tribes were formed. ”

"You mean, the monsters that killed these people would be our ancestors?"

Li Mian was a little big-headed, and it was really difficult to explain to this combat hero, so he couldn't help but glance at Zhao Xinghua next to him again, and saw that he looked deeply convinced, knowing that he had listened. The reason why Zhao Xinghua is easy to accept this seemingly unreliable inference is because he has come all the way, if you look at it with the eyes of the past, then nothing is reasonable, he has experienced a lot of illogical things, and he is used to it.

"That's a long story, about 2.5 million years ago, humanoids appeared. About 2 million years ago, there were still different human races in this world, including Madame Ludo in East Africa, Homo erectus in East Asia, Neanderthals in Europe and West Asia, craftsmen, Heidelberg man, Penghu ape man, etc., but until about 10,000 years ago, only Homo sapiens remained. You and I are the descendants of Homo sapiens. Although we now have different peoples, different skin colors, and different languages, in fact, the modern human beings on Earth are all the same kind of people, Homo sapiens. The people who lived here in the old era 15-200,000 years ago were Homo erectus, which used to be called ape man in textbooks, and belonged to the homo family like Homo sapiens, and China's Zhoukoudian Peking ape man, Yuanmou man, and Lantian man all belonged to Homo erectus, but these are not our ancestors, they are another branch of the family family. Just like the Indian antelope and the American bison in the bovidae family, the two are parallel and independent species, and there is no question of who is whose ancestor. The calves of the Indian antelope are not related to the American bison tens of thousands of years ago. ”

"What? Aren't Peking Man, Yuanmou Man, and Lantian Man our ancestors? ”

"No, they all belong to Homo erectus, and our ancestors were Homo sapiens, who came from East Africa twenty or thirty thousand years ago. And those Homo erectus may have been exterminated by these alien Homo sapiens. ”

"I can't accept what you're saying, how can we become the descendants of Africans again."

"This is a natural evolutionary process of human beings, including the fact that all the races in Eurasia are from Africa, and this is the conclusion reached through human DNA research, and we do not accept that it is mostly due to emotional factors, just as the European Holy See before Copernicus also insisted on the center of the universe on Earth. The study of human DNA and genes has only been a matter of recent years, but the stories of Pangu and Nuwa that we have been exposed to have been imprinted in our hearts since childhood. ”

"Hey, I can't talk about you, then this crack is in front of us now, should we go down?"

"Go down! Whatever you think, I'm going to definitely check it out! ”

Xie Yunhao was asking Zhao Xinghua about it, but he didn't expect Li Yan to answer first.

"What are you going to do?"

"I'll go too!"

This time it was Tang Haoyu who suddenly interjected.

"No, what are you all doing to make a fuss?"

"Lao Xie, you don't understand them, if you really find a geocentric civilization, don't you want to go and see it? They are motivated by a strong sense of curiosity and an attitude towards scientific inquiry, just like the adventurers of the early last century, who could even lose their lives in order to discover the ruins of a new civilization, and the existence of something in this rift in front of them may be even more amazing than the sum of them. ”

"To tell you, I'm a little moved myself. Should we catch the murderer or go on an archaeological expedition? ”

"Do both together!"

……

First fixed with a rope in an absolutely safe position from the entrance of the cave, Zhao Xinghua and Xie Yunhao were the first to slide down the rope, followed by four heavily armed armed police soldiers, and then Tang Haoyu and Li Xuan. The others stayed here to stay vigilant and disposed of the more than 100 human corpses.

This crack is not vertical, but it looks more like a crack from the bottom up, as if it was temporarily excavated from the bottom up, and when it reached the subway position, it caused a small landslide, so it looked more like a crack from above.

This artificial tunnel is very old, and although it is not wide, it is still more than enough to walk at the height of a few people, and there is no need to bend down and bow your head.

The more downhill the air became, the more turbid and thin it became, and the whole space had a strong smell of earth.

"Hey, how far have we come?"

"It's about one or two thousand steps, but if you go by the vertical height, I can't estimate it."

"This is the case here, so will there be any civilization monuments down there?"

"Let's take a look first, let's go back and blow up this tunnel with explosives, completely cutting off their way up."

"Wait a minute, what are you guys looking for?"

Tang Haoyu looked excited, pointed to a rock wall and shouted in a low voice.

Zhao Xinghua took the torch, approached the past and took a photo, but did not find anything special about this rock.

"This is a sponge bone needle fossil, and this damaged one should be a nautilus fossil, which shows that this land was really once below the sea surface, and these are representative creatures of the Cambrian period."

"Oh."

Except for Li Xuan, who went over to check it out, Tang Haoyu's words did not attract the attention of others, they didn't come here to see the fossils.

After walking down for more than half an hour, everyone felt that the oxygen content of the air here was significantly low, and the air was thin and very dull.

"The opening of this tunnel must have taken a lot of manpower, so why wasn't it completed?"

"It is estimated that they can't bear this price, we are very uncomfortable to walk, and they have to dig earthwork and rocks from the bottom up, which requires dozens of times more energy than us."

"But if they hold on a little longer, they'll be able to get to the ground."

"Believing them themselves don't know how much more they have to dig up to reach the outside world, this tunnel may have taken them generations of effort, and they have no confidence after digging there. If it weren't for the subway built on it, it would have been opened up to this tunnel by chance, which would have reconnected this place with the outside world. ”

Under normal circumstances, the depth of subway excavation in the city is about 20 meters, but Metro Line 5 needs to pass under the early Line 2, and the starting point also needs to pass through the Liuyang River, so the depth of Line 5 is deeper than other rail routes, about 40-50 meters. This caused the two tunnels to cross unexpectedly. ”

Zhao Xinghua added:

"I think eighty percent of this tunnel used to pass through the ground, and some humans have gone down, and some apes have gone up. The location of the upper exit may have been in the Mawangdui Han Tomb. The owner of the tomb was originally a local high-ranking official, and he prevented these underground people from going out through the exit of this tunnel, so he built the tomb of his wife on the top of this tunnel, and the ground inside the ancient tomb was deliberately paved with heavy bluestone slabs, which was to block the underground people who intended to come out below. A tall mound was then erected outside the tomb to completely suppress the Australopithecus below, known as Homo erectus. ”

"What you say makes sense, so I suspect that the transparent liquid stored in the coffin also comes from somewhere underground. We may all be able to find the answers to the questions that cannot be explained by the current human technology outside. ”

……

"There's another smell of blood coming from ahead, everyone be careful!"