"come over!"

Seeing Yan Ruyu, who was still childish, and a group of wolf-toothed marten, Han Xinghai couldn't help but straighten his arm like Yan Ruyu and signaled the black wolf-toothed marten to jump up.

"squeak……"

As soon as Han Xinghai finished speaking, the black wolf-toothed marten turned into a black phantom and shot it. Just as he was on full alert, the black little wolf-toothed marten had already landed on the black scimitar.

Han Xinghai was just about to imitate Yan Ruyu to tease the little wolf-toothed mink. The wolf-toothed mink standing on the scimitar suddenly lowered his head and bit on the thick back of the black scimitar with one finger. In a "click" sound, the two sharp teeth of the black scimitar broke down to the ground.

"Squeak..."

Before Han Xinghai could react, the black little wolf-toothed marten fell from the knife with a scream, and then ran wildly, scaring the little wolf-toothed marten surrounding Yan Ruyu to escape, and in a blink of an eye, it ran clean.

"What's wrong?"

Yan Ruyu was playing with the little wolf-toothed mink, but she didn't see the scene just now, and looked at Han Xinghai with a blank look on her face.

"..." Han Xinghai opened his mouth and didn't know how to say it.

"They didn't attack you, why are you hostile to them?" Yan Ruyu's face showed displeasure.

"No... I just called a little black wolf-toothed marten, and it jumped onto my scimitar. Then, as soon as I was about to tease it, it bit a bit hard on the back of the scimitar, and as a result, it broke its teeth." Han Xinghai said with a wry smile on his face.

"Is it true?" Yan Ruyu stared at Han Xinghai with an incredible expression on her face.

"Really. Look, its teeth are still there." Han Xinghai bent down and picked up two sharp broken teeth, and said with a sad face.

"Ah...hahahahahahahahahahaha..."

Yan Ruyu looked down at Han Xinghai’s two sharp teeth on the palm of his hand, stunned for a while, and then couldn’t help laughing, and she was so happy that she leaned back and forth.

"..." Han Xinghai could only smile bitterly.

"Not good!" Yan Ruyu's face changed color.

"What's wrong?"

"These two teeth are one of the most important organs of the wolf-tooth mink. They are specially used to bite and crush hard food. If these two teeth are not available, the wolf-tooth mink will undoubtedly die."

"So serious?" Han Xinghai was stunned.

"Yes."

"Can't it choose softer food?" Han Xinghai asked.

"The recipe for the wolf-tooth mink is mainly the interstellar brigade military ants, and the wolf-tooth mink that has lost its teeth cannot eat the hard shell of the interstellar brigade military ants, unless..."

"Unless what?" Han Xinghai was also a little worried about the wolf-toothed mink and asked quickly.

"Unless you drink the milk of the mink mother, it is obvious that a wolf-toothed mink that gnaws at the steel has been weaned, which means that even if it wants to drink milk, there is no milk to drink."

"That is, it can only starve to death?"

"Yes."

"It...why did it bit my scimitar?"

"The wolf-toothed mink also eats metal."

"What?!" Han Xinghai was shocked.

"In fact, many beasts in our Source Star will eat some metal in small quantities, such as the Star Army Ants you are familiar with. They like to eat metal, as well as the ferocious tigers, etc. The difference is that they eat metal in many ways. Some of them swallow block metal or ore and digest it into the stomach, and some use their teeth to gnaw metal. Among the many beasts, Star Army Ants and Wolf-Toothed mink are among the few that can gnaw metal... Hey, what material is your scimitar? It can actually break the teeth of the Wolf-Toothed mink..."

"I don't know what material it is. In short, it's very hard and invincible. By the way, you said last time that the wolf-toothed mink uses the interstellar military ants as food because there is a certain substance needed by the wolf-toothed mink in the body of the interstellar military ants?"

"Yes."

"Will that substance be a metal?"

"This...is very likely." Yan Ruyu thought for a moment and was not sure.

"It should be logically analyzed, because the wolf-toothed mink is too small and lives in the source star, so it is difficult to obtain metal. The interstellar brigade military ants are large in size and have interstellar migration capabilities. They are easier to obtain metal than the wolf-toothed mink. Therefore, the wolf-toothed mink uses the interstellar brigade military ants as hunting objects."

"It makes sense, but what if the interstellar brigade military ants are extinct?" Yan Ruyu asked curiously.

"Species are extinct every day in nature, but it should be difficult to exterminate species like the Star Brigade Army Ant."

"Why?"

"The interstellar brigade military ants have interstellar migration ability and powerful reproductive ability, which is destined to not be extinct, just like mice. In the history of the seven major star fields, humans have fought with mice for hundreds of thousands of years. Not only did they not exterminate mice, but mice followed the steps of humans and scattered in the universe and conquered one planet after another. In addition to the enemy of humans, mice also have a stronger natural enemy - cats."

"In other words, the wolf-toothed mink cannot exterminate the interstellar brigade army ants."

"Yes, there is a perfect ecological chain between the wolf-toothed mink and the interstellar brigade military ants. This ecological chain is like a relationship between cats and mice, which is difficult to break... I have watched a documentary, and the documentary mentioned that once the cat hunting is extremely active, the reproduction speed of mice will accelerate... In fact, many animals have this instinct, including humans."

"The same is true for humans?" Yan Ruyu asked.

"It has been repeatedly proved in the seven major star fields that once a large-scale war causes a sharp decline in population, human fertility will show an explosive growth, and it can often make up for the number of people who died in war in a very short period of time. On the contrary, once the population reaches a warning line in peacetime, the human body will also have a 'self-discipline' mechanism like animals, reducing the fertility rate to make it live better."

"The problem is that humans will not encounter existential crises like animals. Why does the body activate the self-restraint mechanism?" Yan Ruyu looked puzzled.

"Although humans are at the top of the food chain, when the population reaches a height, the pressure on humans will increase. This pressure comes from all-round, not only national and ethnic competition, but also similar competition, such as housing prices, education, pension and other problems, which will make the body activate the reproductive intention... In short, this is an extremely complex problem. If technology does not intervene, the human body will activate the protection mechanism itself."

"So that's it...you said, will our population in the Source Star increase explosively?"

"Yes, it will be soon!"

"Why?"

"Because, the Source Star has entered the initial stage of mechanical civilization, that is, humans no longer have to worry about food on this planet, but most importantly, the Source Star has a vast living space. Under this situation, the population of the Source Star will soon surge."

"Oh...so that's it."

"We're going too far, it's urgent to find the black little wolf-toothed mink." Han Xinghai felt guilty.

"So what if you find it? You can't find a wolf-toothed marten with milk, right!"

"There are some dairy products in my space ring." Han Xinghai.

"The problem is, we can't find it, and even if we find it, it won't necessarily drink the milk you provide."

"That's how..."

"Hey, they all seem to be accelerating. They should have discovered the nest of the interstellar brigade army ants."

"Um."

When Han Xinghai looked around, he saw the interstellar brigade army ants around him jumping towards the Giant God Peak. Before that, they were all rushing to the road.

Obviously, the wolf-toothed marten in front has already conveyed some information to the wolf-toothed marten behind.

Interstellar brigade military ant nest!

Han Xinghai was inexplicably excited when he thought of finding the queen's nest in Yuanxing.
Chapter completed!