A big fish of more than 100 catties, eaten by two people, has to eat it for a few days to eat, although Zhang Zhi has practiced a good cooking skills, especially barbecue, he is very handy, and he only eats more than ten catties after a meal.

After all, I just ate a shrimp.

"It's a pity I didn't bring any wine!" Zhang Zhi finished the last bite, wiped the corners of his mouth with his sleeve, and then wiped off all the oil stains on his hands with the corners of his clothes.

When Luo Zhiwu saw this scene, his face was cold.

"When I first met you, you were so disgusting."

This time, Zhang Zhi was very satisfied, and his physical fitness increased by 0.7, which was very good, and Luo Zhi's dance was similar.

It was still early, the two of them simply fought zombies for a while, Zhang Zhi was still half a step away from being promoted to ten levels, and 10,000 experience was too difficult, but Luo Zhiwu was about to be promoted to nine levels.

Back in the villa area, it's already lit up. Nos. 73, 74, 75, 76, four villas, 74 and 76 are on the left side of the driveway, and 73 and 75 are on the right side of the driveway.

There was the sound of eating and fighting in the villa, both men and women, which made Zhang Zhi feel a little warm.

It's all the result of your own efforts.

Someone suggested building a wall next to these four buildings, but Zhang Zhi felt that it was not necessary, maybe it would be used in other places in the future, and he had an idea, if there were people in hundreds of villas here, wouldn't it be equivalent to a small town?

The two drove the cockroach back and ran into Kang Shengguo, who was inspecting Yuzhutian.

"Hello Commander!"

Kang Shengguo has been here for two or three days, but he is also used to this way of life, but in addition to cleaning up zombies and leveling, what he prefers is to tinker with some novelties, no, he is now following Lin Han to study mutant creatures.

"Teacher Kang is good, what's the matter, has Teacher Kang researched any reason?" Zhang Zhi said casually, and also walked over with Luo Zhiwu to take a look, and the cockroach queen led the army to the square.

It's only been a few days, and the mutated jade bamboo is already half a meter tall, and it's still a pole, and the leaves haven't been opened.

"What kind of theory, don't make fun of me, just take a look at it and pass the time." Kang Shengguo knew that Zhang Zhi was joking.

Zhang Zhi is actually not good at joking, but he wants to give the members a relaxed environment, so he tries to smile. Luo Zhi danced and felt

"By the way, Mr. Kang, the one you told me yesterday, the level of cosmic civilization, you can continue to talk about it, and I will continue to study."

It turned out that in the past two days, Zhang Zhi had free time every day, and he asked Kang Shengguo to explain some knowledge to himself, although the time was short, but his more than ten spiritual memories were almost unforgettable, and he was an absolute super scholar.

"Yesterday, yesterday I talked about, yes, I talked about the level of civilization in the universe. Before talking about civilization levels, let's talk about a thing called Dyson spheres. What is a Dyson sphere, in fact, a Dyson sphere is a ball. But he's not an ordinary ball, it's a ball that can wrap around the sun, and of course, this ball, his ball wall, may just be a layer of solar collecting panels. ”

Dyson, a physicist who served as Einstein's deputy, was working at the Institute for Advanced Study in Princeton. In 1960 he proposed a scenario in which he envisioned a sufficiently advanced civilization that could use the full energy output of their own star by building a sphere of receivers and energy converters. This is the Dyson sphere. ”

"A civilization that can build a Dyson sphere and has enough ability to harness the full energy output of a star system is called a second-tier civilization. A first-level civilization is able to exploit and utilize the natural resources of the planetary world where it inhabits. At present, we human beings have not even reached the first-level civilization, of course, we have reached eighty percent, and there are hundreds of years, maybe it is a first-level civilization. ”

Speaking of this, Kang Shengguo paused, and Zhang Zhi asked, "Mankind has not fully utilized the earth's energy?" Also, we don't know about ourselves. What about the third-level civilization? ”

"Level 3 civilization? Hehe, I don't know if there is, according to Dyson's assumption, this level of civilization is millions of years ago, tens of millions of years ago, it had rushed out of its original star system, walked towards the Milky Way, and swam in the galaxy. Being able to mobilize the energy of any star, planet, or even other environment he encounters at will in this galaxy for their own use, they can even rush out of the galaxy and go to other galaxies. ”

"With this kind of civilization, it's terrifying!" Zhang Zhi gasped.

This reminded him of the last moment of the dream world, the blue ball of light he faced, what level of civilization was made, a ball of light can form the dome of the earth, wrapping everything under the dome.

"Could it be that this is what they call a Dyson ball? But the Dyson ball is to absorb energy, but they inject energy into the earth, what are they doing, is it really to train slaves and warriors? Or is the earth a farm, just like we raise chickens, put them in pens, and then put them in feed? ”

Thinking of this, Zhang Zhi's scalp was a little numb, but at this time Kang Shengguo spoke again.

"Level 3 civilizations, don't be afraid, in fact, according to calculations, they have only developed millions or tens of millions of years more than us.

Their abilities seem to us as if they belonged to God, but within the limits of the laws of physics. In fact, they were also formed on a distant planet, in the mud of single-celled organisms.

They are also carbon-based life, and some people have proposed silicon-based life and boron-based life, but whether it is carbon-based life formed by the carbon element of our earth, or silicon-based life formed by silicon element, it cannot escape the laws of physics of the universe after all. ”

"By the way, I haven't told you yet, all the creatures on our earth are carbon-based life. Carbon-based life is an organism that uses carbon as the basis of organic matter and water as the medium. ”

"What a long insight!" Zhang Zhi is a liberal arts man, where do you know this.

"We speculate that there are plasma life, electromagnetic wave life, information life, and even dark matter life, of course, these have not been confirmed, and the only thing we can know now is mechanical life, that is, the artificial life created by our earth humans, but this kind of mechanical life cannot be metabolized, and can only exchange information and energy with the outside world."

"It's a robot, and those artificial sweeping robots on the street are it." Zhang Zhi figured it out this time.

"That's right! But this life is actually a pseudo-life. ”

"Oh, by the way, Mr. Kang, those pseudo-lifeforms, no, those robots, can they be repaired from scratch, I see that there are a lot of them on the street, there is no energy, can they be recharged and restarted?" Zhang Zhi suddenly remembered that if there were many such robots, they could not be used to do coolies.

"Yes, but when the end of the world comes, they all lose all the energy in the battery, we have to go to the battery factory to find a new battery, his battery, which is different from what we usually use."

"Battery factory? Where is the battery factory? "Zhang Zhi doesn't know much about this.

"There is a big battery factory in our Shashi City, in Tianxin District, called Biya Battery Factory. The artificial moon in Bao'an City, Zhujiang Province knows that this battery factory belongs to the main contractor and is a very large battery factory. ”

This artificial moon is only available in a few major cities, and only a few countries on the entire earth have operated artificial moons.

The artificial moon is like a satellite, synchronized with the rotation of the earth, and relies on solar energy to charge it, illuminating a city at night, saving the entire city of electric and other lights. This in turn reduces electricity bills and eliminates the need to erect street lights and free up land. Of course, where the lights shine, there is nothing to hide from illegal crimes, and he can track and shoot in a full range.

"Tomorrow we will organize people to go to Tianxin District and get batteries!"

Zhang Zhi directly arranged tomorrow's itinerary.

Luo Zhiwu didn't come back to her senses in Kang Shengguo's words, Zhang Zhi said to go, and she only responded in a daze. I've heard of this kind of mysterious thing before, and I can only understand it as a curiosity, but now that the end times have come, zombies have appeared, and evolution has become popular, what else is impossible?