This is a large natural cavern, where two huge ape-men with white hair have been badly wounded.

During the encounter in the subway tunnel just now, the concentrated shooting of Xie Yunhao's soldiers still caused them serious injuries, and the two ape-men fled here in one breath and could no longer hold on, and finally fell to the ground and fell into a coma due to excessive blood loss.

"What to do with them?"

When the enemy is no longer human and zombie, Xie Yunhao loses the ability to make decisions on the spot.

"Throw it here, they won't live long. Let's take the opportunity to observe this ape-man. ”

Zhao Xinghua is very interested in the two apes on the ground, this is a natural karst cave space, this tunnel to the ground most of the project is opened according to the direction of the rock, so the effort is much less. In this cave, there are weapons such as clay pots and bone spears.

"Doctor Li, do you think this is a temporary camp for these two apes or a long-term living place?"

"It's a makeshift place for them. There is no large amount of stored food and fresh water, and the fire is very small, and there are no other valuable goods, and based on the evolutionary rate of our Homo sapiens, these cavemen must have advanced production tools. But there's nothing here. ”

"Is it because of the environment, their food here is not nutritious, so they have no way to improve their production tools, and due to environmental constraints, they have not continued to evolve for thousands of years?"

"These two ape-men, one male and one female, judging from their teeth, the molars are huge, the roots are very strong, the alveoli are complex, they are not carnivorous, they are similar to humans, they are omnivores."

As he spoke, Li Yan opened the eyelids of an ape-man again, observed them, and continued:

"Because of the perennial darkness here, their eyes have not deteriorated, but have evolved! How is this possible? Their eyeballs and pupils are unusually large. This can only show one thing, the environment in which they live all year round is light! But the light is not strong and bright, which makes their vision system suitable for low-light environments, which means that the first flare may hurt them worse than those rifle bullets, and can almost blind them instantly. ”

"Dr. Li, you said that there is a lack of food here, but you see that their bodies are much taller and stronger than humans, and to maintain such physical strength, they need a lot of protein, what do they live on? Do you want to dissect one and take a look? ”

"I don't know, but it doesn't matter what you eat, they killed so many humans, probably just to bring all the corpses back, or go back underground to find other companions. To them, they treat us like monkeys, they are human. Their armor is made of plant and animal scales, including turtle and other reptile scales, and I can't tell what the specific animal is. ”

"Like other cavemen, it's in a constant state of darkness and constant temperature, so their skin is unpigmented, their hairs are slender and albino and their respiratory organs are degenerated and deformed, and the oxygen content in the air is lower than that of the ground, so they have a slow metabolism."

Li Yan was checking the two white-haired apes one by one, and Tang Haoran took out a notebook from somewhere on his body and was quickly making records.

"We've been walking down the tunnel for more than an hour, and we haven't found a place where they gather on a large scale, and we haven't seen the so-called ancient civilization, the bandit leader once shouted that it can provide space for 100,000 people, are they all standing in this tunnel?"

"No, don't talk about food and water, just so many people come in at the same time, and the air inside is not enough to breathe."

"Does it mean that the bandit leader also sent someone down, otherwise he would not have made such an inference? This inference is obviously beyond his cognition, indicating that someone has seen it with his own eyes, otherwise he would not have imagined any such words as prehistoric civilization. ”

"But why wasn't it eaten by these two apes?"

"Maybe these two ape-men only entered this tunnel today, and this ancient tunnel is rarely visited by underground people, and today they may have entered for exploration, or maybe for other reasons, and then they have been going up."

"Yes, at the beginning of today, when the gang of bandits suddenly encountered zombies, they opened fire and shot for a while, and then we also had a brief shooting behavior when we were fighting with the bandits, and the sound of two thermal weapon firing spread far in the tunnel, maybe it was transmitted along the collapsed position of this tunnel, let them run up to check, accidentally found the exit, and killed the humans near the exit."

"Maybe it's not the gunshots, the corpse man used brainwave manipulation to control when he ambushed those zombies, and he was more interested in brainwave creatures like these underground creatures and bats, so he chased after them."

Several people are making all kinds of assumptions and inferences. Judging from the two unconscious white ape-men on the ground, the simple armor they wore and the bone spears thrown nearby proved that they had a civilization and were not primitive animals that ate hair and drank blood.

The two white apes are between 3.2 and 3.8 meters tall, muscular, and their fingers and claws are particularly hard, and the skin on the front of the fingers of the two palms is keratinized, and there is a lot of dirt in the nails, indicating that they have an evolutionary tendency to use their hands to dig into the soil. Both feet are bare, and no marks on the feet have been found to have been worn through the shoes. With a large head and a much larger brain than a modern human, their eyes are large and their ears are muscular, so it can be inferred that they have a very sensitive sense of sight and hearing.

………………

Several people continued to walk downward, but the number of torches was decreasing, as the oxygen level in the tunnel was getting lower and lower, and the need to breathe was ensured first.

"There is air movement ahead, pay attention to vigilance, don't make a sound!"

Xie Yunhao turned around and reminded everyone.

…………

Several people lay behind a huge granite rock, and when they looked outside, everyone opened their mouths wide, and the scene in front of them was like a science fiction movie.

They couldn't deduce how huge the space was, because the light wasn't very bright, and they couldn't see the end.

The few of them were on a cliff, looking down, there was a huge plain below, and a rushing river could be seen at the bottom, and some tall ferns grew on the plain, and these ferns could emit a faint blue light. It's not just the trees below that are glowing, it's almost the entire underworld.

Li Yan dug up a piece of soil from the soil around him, then crushed it with his hands, and explained to everyone:

"These lichens grow everywhere on the cliff walls, and they are a stable and mutually beneficial symbiotic union between fungi and photosynthetic organisms, similar to special lower plants that live in symbiosis between fungi and algae. Their formation is thought to be caused by photobacteria, just like noctilucent algae in the ocean. Just as there are many fish, jellyfish and other organisms in the deep sea that emit light, it is a selection direction for natural evolution in this specific environment. ”