"To explain it according to the scientific theories of this world, it is almost the organ of a dragon with a fire gland. The anaerobic metabolism of microorganisms within the fire glands has been able to produce ethanol, and some thiobilli can secrete sulfuric acid. The temperature of the fire glands is very high, and ethanol can be dehydrated under the action of sulfuric acid to obtain ether. This biological enzyme reaction is much more efficient than you think, the synthesized ether will be stored in the pulp sac, when it is time to breathe fire, the dragon closes the upper and lower jaws, adjusts the position so that the upper and lower teeth are close and then quickly opens the mouth to spray ether, and at the same time, because the teeth collide and strike a spark, the ignition process is completed. If you're willing to use it as a material for my experiment, I can also make you a flamethrower. Su Mancheng explained.

"......" Ye Qingmian's mouth was half open, and he looked at Su Mancheng directly, he found for the first time that it was not poverty that limited his imagination, but knowledge, and sure enough, he really read less?

"This is just our oldest dragon Yuan Li, who breathed fire at the beginning of evolution, and as it continued to evolve, the endosomal organs continued to evolve, forming a more complex but more efficient and faster reaction chain. ”

"Do you have dragons with blue fire? like Gatling, blue fire. Bai Diandian leaned over and asked, although he had heard Su Mancheng occasionally mention his world before, it was the first time he had heard him talk so carefully.

"Butyric acid is obtained by interrupting the fatty acids in Escherichia coli or other archaea from entering the biofilm by thioesterase, and then turning butyric acid into butyraldehyde through the bacterial enzyme of the acyl carrier protein, and finally catalyzing propane by aldeformant oxygenase under the action of electrons. Propane combustion produces a higher temperature than a normal flame and is more powerful. Su Mancheng said, "And this reaction has gradually evolved into a special organ inflammation gland, and the propane produced is also stored in the plasma sac, which is like a heart, with a diaphragm divided into several parts, which store different kinds of flame raw materials." ”

"In later evolution, dragons developed glands that could produce hydroxide flames or oxyacetylene flames. Mixed combustible gases similar to gas cutting. If you can cut Tarzan into neat pieces of tofu, it won't collapse. Su Mancheng seemed to be caught in the meeting of the past, and he looked homesick. "This propane produces carbon dioxide and water when burned, which is very clean and environmentally friendly. We have a harsh environment there, and sometimes we need dragon pets to make clean water for drinking. ”

"I know!ambergris!" Bai Dian's eyes lit up.

"That's saliva, don't be disgusting, okay?" Su Mancheng said.

Ye Qingmian's throat moved, and he swallowed the saliva that was about to flow out with difficulty, he was really ... Uneducated. Charizard...... This kind of thing... I really want to go home with Su Mancheng to have a look, "Is there any ice spraying?"

"Yes, spray liquid nitrogen. Su Mancheng said naturally.

"Awesome. Ye Qingmian is really lacking in language, except for the word awesome, it is too late to use other more gorgeous language to describe his feelings. "Do you know how to use poison? Poison Dragon!"

"Yes, there are in the swamps of the Tamiasso plateau. Su Mancheng said.

"Slow down, slow down, talk about it carefully. Ye Qingmian was like a curious baby at this time, Bai Didi's talk was getting more and more boring, far less fresh than Su Mancheng's arrival.

"Similar to fire dragons and ice dragons, poison dragons have a venom gland that produces and stores toxins, a steroidal toxoid that has a lot of microorganisms that feed on it. The structure of the poison dragon's mouth is different from that of the fire dragon, after spewing venom, it will cause the venom to atomize like a humidifier, and at the same time, the internal microorganisms will die after being exposed to the air, forming a strong acid that you do not have in this world, which can break the epidermis of the organism and allow the toxin to penetrate directly into the bloodstream. Toxins used inside or outside axons can cause irreversible depolarization of axons, reduce the amplitude of potential action, hinder ion exchange in animals, and make nerve cell membranes become poor conductors of nerve impulses, so that the instructions issued by the nerve center cannot reach the tissues and organs normally, and eventually cause the heart to stop beating and there is no effective emergency measure. Su Mancheng told the story, making Ye Qingmian wonder if those who wrote novels, especially the first one to write dragons, came from Su Mancheng's world, "But for human beings, being sprayed by a poisonous dragon is not the last to be poisoned, but directly burned to death by a large amount of strong acid." ”

"What about the Iron Dragon?" Ye Qingmian's curiosity was completely aroused.

"No, because dragon scales are harder than steel, and they have the same toughness that steel doesn't have. All dragons are immune to toxins and fire, and they also benefit from dragon scales. Dragon scales are a complex material to generate, and our world has been working on synthesizing materials similar to dragon scales but never achieved it. After the dragon dies and decays, the dragon scales fall off and will not degrade for tens of thousands of years. So in our place, dragon scales are very good building materials, fireproof, earthquake-resistant, especially precious!" replied Su Mancheng.

"Why did your dragon evolve such a strange skill!" Ye Qingmian imagined that world full of dragons flying in his mind, and he couldn't tell whether it was yearning or fear, so should he be able to use it as a mount?

"We have a lot of mountains there, and 10,000-meter mountains can be seen everywhere, so the flight space of dragons is at an altitude of 10km ~ 30km from the ground, a bit like the stratosphere of the earth, of course, we call it the purple barrier. There are plenty of tiny, translucent plants suspended there, redbuds, which are almost negligible in weight but can be propagated at ultra-low temperatures. Due to the gravitational pull of the guardian star, the Bauhinia will move like a tidal wave in the purple barrier layer, forming a purple barrier circulation similar to ocean currents and atmospheric circulation. ”

"Where Bauhinia is dense, dragons will be hindered from flying, and they need to be cleared with high-temperature flames. So our dragons evolved fire-breathing characteristics, and the other dragons were similar. ”

"Doesn't that plant block the sun?" Ye Qingmian asked.

"Of course, but our planet is a little closer to the star, and the heat is not suitable for living things. However, after the emergence of the bauhinia and the formation of the purple barrier layer, a large amount of light is reflected and partially absorbed, the surface temperature begins to drop, rivers gradually form, and the global temperature difference begins to shrink, forming an environment similar to the earth. Therefore, the purple barrier is the guarantee of our survival. ”

"I've seen it for a long time. Ye Qingmian took a long breath, feeling that he had been sitting in the well and watching the sky all along, and the end of his original thinking was a door, locking his cognition, "The civilization that evolved life under the conditions of your planet should be very different from that of the earth." But why are your humans like us? In other words, how did you evolve intelligent life with a head, two arms, and two legs, which is exactly like the earth?"

"Uh..." Su Mancheng was silent for a moment, his eyes rolling to the left and up.

"Poof. Zhong Ming on the side seemed to smile, but when Ye Qingmian looked over, he returned to 'normal', but Ye Qingmian clearly saw that he was holding back very hard, and he had never seen a serious Zhong Ming have such an expression.

"What's wrong with you?" Ye Qingmian wondered.

"I can't. Zhong Ming grinned rarely, revealing his white teeth. It turns out that this guy can also laugh, Ye Qingmian has seen it again. "That's a big question you just asked. ”

"What's the problem? Why did two planets evolve the same kind of life?"

"yes. ”

"So what, what do you want to express?" Ye Qingmian wondered.

"I want to say that this question is a bit complicated, so Su Mancheng didn't know how to make it up for you for a while. Zhong Ming maintained an irrepressible smile, "I am from the same place as Su Mancheng, it is a world similar to the level of medieval technology, I am a knight of faith, and Su Mancheng is an apprentice of history. ”

"You're not lying to me, are you?" Ye Qingmian was a little confused, he was really messed up, and when he looked back at Su Mancheng, he was already laughing over there. Only the white dots blinked, more confused than Ye Qingmian.

"You lied to me?!" Ye Qingmian didn't know whether he was angry or speechless, and there was a violent urge in his body, so he looked directly at Su Mancheng and asked.

"That's really me making it up, but isn't it a thief science?" Su Mancheng saw that Ye Qingmian's mood was very unstable, so he hurriedly continued, "But I didn't lie to you, that world really exists." ”

"You said it was made up, and you said it was real?" Ye Qingmian felt that he was really reading! Otherwise, how could he even believe this kind of thing and listen to it for a long time, and still sigh at the size of the world!

"According to Bai Didi's theory of space-time splitting, our coaxial universe will inevitably split into a world exactly like the world I said, even if the coaxial universe does not have it, then the parallel universe must have it, there is a purple barrier, there are dragons, fire-breathing, and puff-puff. Su Mancheng explained.

"Puff puff puff your sister, you should write a novel, such a perfect scientific world structure, just to amuse me, you are idle fart!" Ye Qingmian really didn't know what to say, at least even he was amused, this person was simply... No, you should write down what Su Mancheng did just now, and when you have nothing to do, you can find someone to talk about it.

"You can't say that, science has no limits, my idea is not perfect, otherwise how could you find a loophole. But I do need to think about how I'll answer this question the next time someone asks me about it. Su Mancheng began to think carefully again, as if he was refining the idea he had just made, and at the same time glanced at Zhong Ming with some complaint.

"What is the parallel universe you just mentioned? It can't be that you made it up again, right?" Ye Qingmian asked.

"No, Bai Didi said, I'm talking, just starting to say. Su Mancheng pointed at Bai Didi, "The structure over there is really perfect, even if it's fake, I admit it." You can also listen to it, everyone is fooled together. ”

Ye Qingmian looked over, Bai Didi was replacing the three-dimensional picture in mid-air, "So, before I explain to you the meaning of the existence of the reincarnation channel, I must first explain the parallel universe for you, and I will briefly talk about it below." ”