"I don't understand, now ordinary ants have the size of a small thumb, ordinary centipedes have become the thickness of a thumb, the world environment has been completely different from before, what makes them change so much? You see these animals are getting stronger and stronger, and they are getting bigger and bigger, and if they continue to develop like this, won't the earth's resources be exhausted? ”

Although Duan Zhi is a grassroots manager of the God Worship Sect, he obviously doesn't believe that all this really comes from God, and after getting along with Lin Han in the past few days, he occasionally has some doubts.

Lin Han sat down on the ground, lay down all of a sudden, looked at the sunlight projected through the gaps in the leaves through the huge bush jungle and said, "Do you know the Carboniferous? ”

"What Carboniferous?" Duan Zhi also lay down.

"Beginning 350 million years ago, the Earth entered the Carboniferous period, which lasted more than 60 million years. During the Carboniferous period, the earth was ten times more abundant than it is now, and most of the coal and oil were formed in this era because the flora and fauna were too abundant in this era. ”

"The Carboniferous Period, also known as the Age of Giant Worms, was when animals were probably more powerful than they are now. Dragonflies have a wingspan of nearly one meter, spiders the size of a human head, and a centipede-like insect that is three meters long. ”

Duan Zhi shook his head and said, "This is too exaggerated, but it may not be impossible to become like this in time, didn't we see a fist-sized seven-star ladybug yesterday." ”

"You're looking at a certain mutant, not the universal seven-star ladybug is the size of a fist. The Carboniferous period is that as long as it is a dragonfly, it will grow up so big, you can imagine how terrifying the earth's ecology was at that time, and how prosperous the animals and plants were. These are all appearances, and I want to talk about the root causes. ”

"What is the root cause?" Duan Zhi was curious, he thought to himself, wasn't it the gods who came down to the world to descend power? But he didn't dare to say this, for fear of revealing his identity.

"During the Carboniferous period, the Earth's oxygen content reached 35% of the total air, compared to 21% of the total air now. If you think about it, a breath full of oxygen, how fresh, and how much lighter the load on the animal is, this cannot be calculated by simple addition. ”

"35% oxygen? Then we only need two breaths of air for three breaths. Duan Zhike had never heard of this, and he could only calculate it like this.

Lin Han shook his head and said: "Just think according to what you said, since now, have you noticed that your physical strength is dozens of times that of before, although the consumption does not need to be dozens of times as before, but it has also increased a lot, have you found that you have difficulty breathing?" ”

"No, I'm breathing normally."

"yes, breathing normally. My mentor and I have studied that since we have increased our physical strength, but not in volume, our normal consumption increases inside the cells, and unless we do exercises that exceed our previous limits, our normal energy consumption only increases by 7% as before. And the other day we analyzed the oxygen content in the air, and it happened to increase by 7%, and now the oxygen content of the air we breathe is 28%. So your breath now feels the same as before. ”

"Ah, what a coincidence?"

"Yes, that's such a coincidence, and according to our tracking research over this time, the oxygen level in the air is still increasing, and it should soon increase to the level of the Giant Bug Age." There was no excitement in Lin Han's eyes, but he was a little worried.

Because the higher the oxygen concentration, the better, and if the oxygen concentration is too high, the average person may be poisoned by oxygen. Fires of all kinds are also more likely to occur.

Duan Zhi couldn't help but admire Lin Han a little in his heart, he himself was just an ordinary person, and his education level was not high, and he was able to be a squad leader in the sect because of his strong combat awareness and physical fitness.

These scientific researchers were able to study genetic serum in such a short period of time in the last days, which would have given him a high look.

After resting for half an hour, a group of five people continued to set off, Duan Zhi opened the way in front, and after Zhou Kuo broke off, one person on each side, protecting Lin Han in the middle, after all, people are employers, and they must be good-looking on the surface.

The road they took was the former national highway, but now there is still a national highway, and the vines on both sides of the road have grown wildly, and after a spring and summer, they have grown to be paved with concrete. Many tall broad-leaved plants also mutate, with their roots directly pushing up the road surface and their branches and leaves bathing in sunlight.

This is still walkable, if there is no national highway, then they can only fly helicopters.

But the probability of survival of the helicopter is lower, the crisis in the sky is uncontrollable, and if it falls, there is no chance of survival.

Half a day later, the five of them reached the top and saw several buildings covered with plants on the top of the mountain, in which several zombies had been gnawed by unknown animals and only bones remained, and hundreds of thumb-sized flies buzzed on the corpses.

In this half a day, they have gone through three major battles and more than ten small battles, and their bodies are already tired, even if they are disgusting here, at least it is a good place to rest.

I rested here for the night, relatively fine, and went down the mountain on the second day, which was the real Xiangxi.

Two days later, Jishou City, the capital of Xiangxi, on the shore of the artificial lake of Jishou University, four figures arrived here. Even if they were careful, they lost one more person in two days, and Zhou Kuo also lost three fingers.

As for the main combatant, Duan Zhi, he is now close to running out of oil.

There was no need to make special arrangements, the natural dangers they directly faced had already won Lin Han's respect, and he was about to recommend it to the regiment to see if he could introduce Duan Zhi to the mercenary group when the time came.

Duan Zhi seems to be from a wild road, but his combat awareness is far above Ouyang Liang and others, and he is a rare talent.

Lin Han even promised to exchange him for a katana of nanomaterials in the group, which made Duan Zhi's heart hot, and he secretly thought that this trip was the right one.

The weapons they use now are ordinary steel knives in addition to guns, and the nano katana is a high-end product, and even the cockroach mercenary group will not sell it easily.

Everyone has their own thoughts in their hearts, whether it is the system or the sect, it is all for the sake of profit.

The four of them came to the gate of Jishou University, Zhou Kuo went up to negotiate with the doorman, and Lin Han found that he seemed to be quite familiar.

It turns out that this Jishou University is the only one university in the entire Xiangxi Prefecture, located in Jishou City, the capital of Xiangxi Prefecture, with more than 40,000 students and many survivors.

The four of them spent the night repairing in the Jida shelter, but the leader of the shelter was not enthusiastic. If it was a local who came to take refuge, others would naturally be warmly received, but if they were passing by, they would already feel that Lin Han and the others had no oil and water on them, otherwise they didn't know what would happen.

The last days are so realistic.

But it was said that Zhang Zhi was looking for directions all the way according to the map, with the speed of a demon, and it took a few days to finally reach the west coast of the United States, ready to cross the Pacific Ocean.

There is no navigation, you can only follow the direction of the sun, and you will trim the island when you encounter it, and you will also encounter many sea birds of prey, but there is no danger.

Just when everything was calm, Zhang Zhi received news from Xue Beichen on this day.

"Brother! I heard that you have done a great job in the United States, and you killed Lois and Reeves, the two famous characters on the list? ”

"It's me, how do you know?" Zhang Zhi was curious, he hadn't left the Pacific Ocean yet, it was estimated that he had only left for half of the time, and there was no satellite phone, how could Xue Beichen know?

Xue Beichen immediately replied to the message: "Of course it's a national channel, by the way, I'm not ridiculing you, I just want to tell you the news, the extreme agent has issued a special mission called the Extreme Pursuit Order, and a reward of 10,000 boosters, that is, 10,000 genetic serums will be exchanged for your head." ”

"10,000 gene serum? My head is worth a lot, but it's a little difficult to get my head. Zhang Zhi has this self-confidence.

"I know you are a master, now your two identities are very scary, Zhang Zhi is the first person in the galaxy list data, and Xuan Ku is also known as the first person in the martial arts of Huaxia by some people, of course it is not easy to take your head. But what about your mercenary group? Xue Beichen sent another message.

Zhang Zhi was stunned and said, "What's the situation?" Do they still have to deal with cockroach mercenary groups? ”

"It's not just about dealing with it, it's already out of the bounty, the first three thousand for each member of the battle group, three thousand for each of the core managers, one thousand for each of the ordinary members, and one thousand for each of the ordinary members, and the fatal Langjun Yu Yan and the cold-blooded Shura Luo Zhi Dance are elite fighters, and the bounty amount for each person is eight thousand. This news is transmitted internally, and it is estimated that it will only spread in three to five days, and you have to be prepared to deal with it. ”

Seeing this, Zhang Zhi was not calm, the cockroach mercenary group now has more than fifty people, which seems to be a relatively large number, but it is a drop in the ocean in the whole world, no matter how powerful it is, in the face of such a chase and killing order, it is at least difficult to move an inch.

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