Han Du already had a general understanding of the environment in this cave, so it was speculated that this prehistoric zombie worm should be afraid of light and prefer a dark, damp, and closed environment, so that the water temperature and water quality would be relatively stable.

"Fortunately, it's no wonder that everything outside this cave is extinct, and if these horrible and perverted creatures breed and spread like flies and mosquitoes, the world will suffer." Han Du couldn't help but feel a sense of schadenfreude.

This is probably also a kind of balance, there are more of these aspects, and there are fewer of them, and it seems that there is really a law that governs the world.

"It is true that although they have strict requirements for their living environment, and the slightest change in the outside world can easily cause them a devastating blow, their ability to manipulate the host is extremely rare and absolutely terrifying."

"Do they have any other characteristics of their own? And how do they survive through the host? ”

"These two questions are also what I will explain to you next, this prehistoric zombie worm is male and female, the male is small in size, but there are many of them; Females are larger, two to three times the size of males, and they are longer, but their numbers are extremely rare, but females are at the core of the prehistoric zombie worm population, they do not need to find a host, they live in fixed underwater nests, and are mainly responsible for reproduction, and their status is the same as that of the queen ant in ants.

In addition, they are also a group of parasitic organisms, parasitic with symbiotic bacteria, because prehistoric zombie worms have no eyes, nose, ears, and no internal organs, through the help of symbiotic bacteria on the body, a large number of nutrients in the host body, and also feed the female worms with the nutrients they suck, maintaining the continuation of the entire population. ”

This is the general situation of the prehistoric zombie worm, and the system explanation is quite detailed and clear.

Figuring out the origin of these silver-gray long worms, Han Du returned to the same place along the river bank, Yu Shengnan had already returned, and no long worms were found on his body.

"You all listen, I just contacted a friend who is proficient in paleontology, and described to him the silver-gray long worm, he said that this should be a prehistoric zombie worm, it is likely that the outside world has long been extinct, and the only one left in this cave, he also speculated that this long worm should be able to manipulate the host and suck the nutrients in the host, so everyone should be careful and try not to touch the things in the underground river."

Han Du roughly described the prehistoric zombie worm, mainly to remind the people around him, as for more details, they can't explain, otherwise they will wonder how Han Du can know so much and so much detail.

"Sure enough, I've seen a lot of strange creatures in various caves over the years, and this silver-gray long worm is the most special, and it's the first time I've come into contact with it." Yu Shengnan had actually had such a guess for a long time, and now after Han Du's prompt, she was even more convinced that her guess was completely correct.

"By the way, Han Du, that friend of yours is very knowledgeable, who is it?" Yu Shengnan came out of his thoughts and asked curiously.

Han Du was very embarrassed, it was inconvenient to say this matter of the system, and no one wanted to believe it, so he said perfunctorily with a consistent attitude: "He is my friend, and you don't know him when he said it, why do you ask so much." ”

"Little family, I don't think you want to say it." Yu Shengnan glared at Han Du, but fortunately he didn't ask any questions.

After that, everyone prepared to eat together, a pot of fragrant rabbit broth was boiled, and the fresh meat on the barbecue grill was also grilled.

Everyone ate together, Han Du began to drink rabbit soup after eating a piece of barbecue, sitting in such an empty and huge cave, Han Du remembered the matter, and asked Yu Shengnan and Cui Kai: "You two have been here longer than me, do you know the other red-faced monkeys, ah no, do you know the whereabouts of the other red-faced and white-haired monsters?" Don't worry about them coming back? ”

Regarding the fact that the red-faced and white-haired monsters were actually a group of red-faced monkeys, Han Du couldn't explain to them, so he could only continue to call them red-faced and white-haired monsters.

It is a sad thing to mention these red-faced and white-haired monsters, Yu Shengnan held a bowl of rabbit meat, looked at the pile of white limestone graves and said: "The area of this cave is really too big, we have been looking for a long time here, and we still haven't found where their group is located. ”

Animals and humans are actually very similar in some ways, in the face of heavy survival pressure, it is difficult to eat and drink enough and have nothing to do, so they naturally like to lie still.

Of course, the red-faced and white-haired monsters in this cave are too ferocious, if left unchecked, sooner or later they will cause a catastrophe, in case one day they gradually adapt to the outside environment and take the first step of curiosity outside, how many people will be killed and injured in the future.

Han Du thought of this, so he asked, he felt that it was necessary to get rid of these brutal creatures who accidentally stepped into a fork in the road of evolution.

About ten minutes later, Han Du took the first step to eat, poured the remaining rabbit meat in his bowl to the leopard, and then said: "Captain Yu, Deputy Captain Cui, you two will return along the same path after eating, your expedition has suffered too much loss today, go back and have a good rest, it is too dangerous to go on again." ”

Yu Shengnan and Cui Kai both stared at Han Du, and the meaning in their eyes looked very strange.

"Han Du, what you said later was actually about to find a chance to tell you, you shouldn't be a professional explorer, people like you can only be regarded as impulsive travelers, it is completely your luck to be able to walk here safely in this kind of cave, let's hurry back the same way after eating, we have to continue walking." Yu Shengnan looked at Han Du very seriously.

"Our captain is right, you shouldn't come in with us when you're outside, originally I thought that you would automatically retreat when you saw those bloody scenes above, but I didn't expect that Han Du, you, the captain, didn't leave, and dared to run down with a few of your own team members, you really don't take your own and your companions' lives seriously?" Cui Kai also said very seriously.

Han Du just said a word, and the two of them chattered a lot, it seems that they really regard him as a hot-headed donkey friend, I don't know if this is related to the fact that his expedition team was not officially formed, and he does not have the aura that belongs to the expedition leader at present.

Yu Shengnan has that kind of aura and that kind of temperament.

"Can you tell me why you want to keep going?" Han Du didn't rush to explain that he was really not a hot-headed traveler.

"Needless to ask, we want revenge! After so many brothers and sisters died, if you don't avenge them, you can't explain to your heart! Yu Shengnan Huo Ran got up, and the dishes and chopsticks in his hand were tightly squeezed by her.