“…… According to the current model, our universe is located in a three-dimensional membrane. There are two types of strings that form elementary particles: closed and open. Gravitons are open-strings, and their ends are located in higher dimensions of the membrane, so they can penetrate multiple dimensions. So gravity looks very weak. ”

"Photons, electrons, quarks, etc., are made of closed strings, so they cannot leave our three-dimensional universe."

"I don't know if there are any more closed-string substances in other membranes...... For the time being, perturbation detection can only be carried out by graviton. The other membrane is actually equivalent to a parallel universe. The collision between membranes is devastating to our universe...... Of course, we don't need to worry about this for the time being. ”

In this large-scale popular science lecture, Yu Yifeng was listening with relish.

The study of space and the multidimensional universe has always been the focus of current development. It also affects many fields, such as artificial gravity, anti-gravity, higher speed curvature navigation, and so on.

Even transforming a white dwarf requires the use of dimensional technology. If there is no way to counteract gravity, all the machinery will simply be flattened.

After the lecture, there was thunderous applause......

Time flies, and it is now September 723 of the New Human Calendar, and it has been sixty-three years since the Pangu opened the escape mode......

After blowing up one of the enemy's battle stars, the new humans succeeded, disrupting the entire "siege" plan.

On the one hand, there is a small breakthrough in the encirclement; On the other hand, the destruction of the battle star has also brought great deterrence to a certain extent.

A planet has been destroyed inexplicably, and a normal commander has to run over to take a look, right? Otherwise, maybe this kind of bad luck will befall you again.

In such a difficult situation of communication, it often takes several years from the observation to the destruction of the battle star, to the voyage to reinforcements.

Obviously, when it comes to rescuing your own Battlestar or tracking down an enemy that may not be able to catch up, many Battlestars choose the former......

This, combined with the huge spatial distances in the universe, leads to a significant delay in information. It may take more than ten years for the news of the destruction of the Battle Star to spread throughout the entire siege network, which greatly delays the time and allows the Pangu to escape smoothly.

It took another decade for the entire civilization to completely build a planetary curvature engine. The speed of Pangu's movement has also reached 8 times the speed of light.

The sharp increase in sailing speed also made the LLP Silicon Alliance gradually abandon the pursuit.

Forty years ago, the Future also successfully merged with the Pangu.

Recalling the moment when he destroyed the enemy's battle star more than sixty years ago, Yu Yifeng still felt a burst of excitement......

After listening to this lecture, he returned to the central headquarters of the Pangu, and the reports on the computer were already piling up.

The entire planet is in full swing, and with the convergence of Future and Pangu, the subsidiary civilizations have awakened from hibernation, and the golden age of great development is approaching quickly!

The development of Pangu has brought too many jobs.

A planet needs to be hollowed out by 10%-20% inside, which is equivalent to tens of billions of tons of matter!

Tens of billions of tons! It is eight orders of magnitude heavier than Future.

What a huge project this is, and hundreds of years of hard work is not much.

The process of building a planet is also the process of civilization growth, whether it is industry, agriculture, or entertainment. After all, it is impossible for a person to only work without resting.

As a result, the whole stall is getting bigger and bigger, there are more and more jobs, and there is also a large-scale population shortage. Even if the population of the subordinate civilization takes on some of the work of flexibility that is marginalized, it is still far from enough.

"Lack of people......" Yu Yifeng had a slight headache. When I think of the national transhuman project in the Mifu Star period, I don't know if it's right or wrong.

If that plan hadn't been implemented, the current population would have been seven or eight billion, if not one billion, right? No matter how bad it is, no matter how low the birth rate is, there are still one or two hundred million.

The results are now ......

"But it's hard to say, if that plan is not implemented, many important scientists will die of old age, and these scientists are selected from the six billion earthlings, and there is no one in ten thousand......"

"Without transforming into a superhuman, the average intelligence is not as high as it is now, almost the genius of the whole people. It is likely that we are only an L3 civilization until now, and we are not even as productive as we are now. ”

Yu Yifeng thought about it for a while and gave up the entanglement in this regard, it was too late to regret it anyway. And he still thinks he made the right choice.

The results of the "Census Report" of the 722nd year of the new human calendar show that after so many years, the population of the new human race has finally exceeded the 6.6 million mark, and the ratio of men and women is basically balanced.

Among them, 5.2% of the population is still studying in school, which is not very useful. The rest, basically, are highly qualified people.

The population of indigenous lizards has increased by about 26% to a total of 60 million......

I have to say that this figure is seriously lower than expected, and it took more than 60 years to increase the population by 26%, isn't it a joke?

In contrast, a strange scene happened. The birth rate of the Chiyanjiao people, who have a lower reproductive ability, is higher, and there are even second and third children, with a total population of about 1.8 million.

The demographic issue is a serious one. With a total population of less than 100 million, it is still a little difficult to transform the entire planet.

Soon there were relevant researchers who conducted a series of scientific studies on this phenomenon.

It has been found that the low birth rate of the lizard population is due to a series of consequences caused by the dividends of science and technology.

Technology is becoming more and more developed, life is getting better and better, and the concept of having children and providing for the elderly no longer exists.

However, the more developed it is, the higher the relative cost of raising a child and the lower the rate of return.

At this stage, for the lizardmen, raising a child is not only to feed, but also to raise well. Educational resources are always scarce here, which greatly increases the cost of cultivating lizards.

The second is the lengthening of the breeding cycle, which also makes the birth rate lower. In the agricultural era, you can work in the fields at the age of ten, while in the interstellar age, you are still in school at the age of thirty, which also brings more burden to the family.

After all, these lizards do not have a comprehensive free communist system.

"The average lifespan of a lizard has increased to 110 years. The first thirty years have to be spent studying, and the next forty or fifty years have to work before they can retire in retirement, in this case, it is normal to have a low birth rate. ”

An expert in charge of the population census said: "For them, life is not a small pressure. There are a lot of complaints in the internal web forum. ”

"Stress...... Isn't there pressure on our children? But you can't do it without reading......"

Yu Yifeng spread his hands: "If you don't study, you can't even farm, and now it's all science and technology farming." Do you want us to raise them for free? Impossible......"

"Intelligent beings are always greedy, and it's normal for them to want better benefits. Then come up with more contributions, higher value! ”

"Better treatment, including longer life expectancy, is not difficult for us, but only by paying enough price can we help them ......"

Comparatively speaking, the birth rate of the Chiyanjiao people is higher because they have a higher sense of crisis. This civilization subconsciously compares with Hexiyi, it has always been weak in terms of population, and it is also weak in terms of industry, after all, the subordinate civilizations have always been in a state of competition and cooperation.

This faint sense of crisis has always encouraged a large number of births within civilization.

The most important thing is that the Chiyanjiao people naturally have a very long lifespan, even if there are no special means of prolonging life, they can survive for more than 300 years. In comparison, more than 30 years of study time is slightly acceptable.

"The regulation of population policy will continue, but how it will develop in the future will be solved by them, and we still need not to worry too much."