The micro-universe in which the invaders are located is much more complex than the micro-universe in which humans are located, that is, the solar system.

It was a binary star system. In the center of the galaxy, there is a star with a mass much larger than the sun, and there are more than 30 planets in the ecliptic plane, one of which is equivalent to two-thirds the mass of the sun, and became the second star in the galaxy at the beginning of its birth. Because the mass difference was so great, the smaller star was captured and became the planet of the larger star.

The home planet of the invaders is a planet of this smaller star.

Strictly speaking, it should be a single satellite in the entire galaxy. It's just that this satellite is also very large, about twice the size of the Earth, 1.4 times the mass of the Earth, the surface gravity is not much different from the Earth, and the ocean covers 90% of the planet's surface. Aside from the vast ocean, there is very little land on the planet, and it is full of small islands, the largest of which is about the size of the United Kingdom.

However, this is not the only planet in the entire galaxy that has produced life.

There are a total of seven planets in the life belt of the galaxy, and three of them have liquid water, which means that they have an ecological environment that produces carbon-based life. It's just that the natural conditions on these three planets are very harsh, and one of the planets has almost a hundred times the mass of the Earth, and the surface gravity is ten times that of the Earth. The other planet has too large an orbital centrifugal angle, with only about two-thirds of its orbital period in the life zone, and the other third of the time, either extremely hot or cold, and only very low life forms. There is also a planet that does not have a strong enough magnetic field to withstand storms from the host star, and only has liquid water in the low-lying areas of the poles.

Comparatively speaking, the planet where the invaders were born has the most ideal natural environment.

Like humans, invaders come from the ocean. The difference is that the invaders have always been in the ocean and have evolved intelligence in the ocean.

That is, the invader is a sea creature.

It was only after entering the stage of self-evolution, that is, after mastering extremely advanced science and technology, that the invaders basically broke away from the ocean.

It was also at this stage that the evolution of the invaders diverged, and three different forms appeared.

One is to maintain the original appearance, that is, it is more suitable for surviving in the ocean, and it retains its respiratory organs similar to gills, and it is more suitable for moving in the ocean, and there is a way of communication that lives by sound. One was completely changed, becoming a bipedal walker, with forefins evolving into forelimbs and respiratory organs similar to lungs. The third species is in between, retaining the gills and at the same time evolving lungs, which have amphibian survivability.

Interestingly, the genetic differences between these three different forms of intelligent life are very small.

The difference between the three types of intelligent life is mainly reflected in the social culture. That is, intelligent life that is fully adapted to life on land is more aggressive, while intelligent life that maintains its original appearance is more gentle, and amphibious intelligent life is known for its intelligence and cunning.

After the technological leap, the invaders took control of the entire star system in a short period of time, established colonies on three other planets with natural ecological environments, developed space cities, and established many bases on sub-star planets mainly to mine resources.

Although there is no foreign invasion, the harsh living environment, the rapidly expanding population, and the resource competition between the three different populations have given the invaders enough motivation to develop, so that the invaders' science and technology have developed rapidly, and the invaders have completed their self-evolution at an astonishing speed.

Relatively speaking, the living environment of human beings is too ideal.

In a sense, before the era of catastrophe, the stagnation of human scientific and technological civilization is directly related to the fact that human beings have not encountered harsh existential pressure. Even if we look at the history of mankind, the era of great progress in science and technology has been accompanied by a harsh competition for survival, even if it is only within human beings, that is, between nations and nations. After that, the long-term peace has deprived humanity of the motivation to move forward.

Obviously, the invaders simply did not have such an ideal environment to survive.

Although theoretically the invader's home planet, the moon that is almost completely covered by the ocean, has an almost inexhaustible resource, the competition between the three populations, and the increase in numbers due to the more specific breeding methods, have caused great problems for the invaders.

It is important to know that the invaders of the three populations are oviparous organisms.

In the natural evolution stage, the survival rate of oviparous organisms is very low, but in the stage of self-evolution, with the growth of science and technology, the reproductive efficiency of oviparous organisms is several times higher than that of viviparous organisms. Once survival is assured, oviparous organisms can reproduce dozens, if not hundreds, of offspring in one generation. In contrast, the reproductive efficiency of humans is too low, with a maximum of more than a dozen offspring in a generation.

All these factors forced the invaders to open up new territories and expand their living space.

In fact, the star system where the invaders are located is much larger than the solar system, and there are enough planets that even if the environment of some planets is extremely harsh, it can rely on technology to modify the environment. In the solar system, only the earth is really suitable for human life, even if there may be liquid water on some moons of Jupiter and Saturn, and there may even be lower life similar to bacteria, but to transform it into an ecological environment that can be used for human life and reproduction, it is a very laborious and resource-intensive thing, and it will take enough time.

The problem is that the strong momentum generated by the explosion of science and technology soon brought the development of the intruder into a bottleneck.

After completing the development of their own system, the invaders set their sights on the universe beyond the galaxy and began preparations to colonize outer space.

It was at this time that the invaders discovered that they were in nothing more than a closed micro-universe.

After thousands of stellar years of exploration, the invaders came to terms with this fact, and the intense pressure to survive forced them to find another way out.

That is, in the long period of exploration, the invaders have used up almost all their resources.

If no way out is found, then after all resources are exhausted, the population of the invaders will either die out or be forced to lower the level of technology, that is, the quality of life.

Obviously, both of these outcomes were unacceptable to the invaders.

To this end, the three populations of the invaders reached a peace agreement, stopped the pointless internal strife, and used the last resources to new areas of scientific research.

Space Technique!

Although at the time of making this decision, the invaders did not know the existence of the great civilization of the Dao, nor did they know whether there were any other micro-universes in the Dao besides their micro-universes, but for the invaders, the only way to continue to develop was to break through the spatial limitations of the micro-universe.

The investment in the field of space technology has allowed the intruders to obtain essential changes.

It's just that the invaders have paid a very heavy price for their survival.

That is, when the resources were about to be exhausted, the invaders made a major breakthrough and thus understood the existence of great civilizations and other micro-universes. It's just that before the spatial limitations are breached, the remaining resources are no longer enough for all the intelligent individuals in the population to survive in the original way. Intruders have to choose between allowing a few individuals to move forward and allowing the vast majority to survive.

It's a cruel choice, but it's also an inevitable choice.

To this end, the invaders set up a population information database, made every effort to preserve the information of almost all individuals, and then came up with a large population selection.

In the end, less than 1 in 10,000 individuals have a chance to survive and explore new frontiers.

In order to create opportunities for these individuals, all other individuals have made self-sacrifices.

Of course, the surviving individuals are tasked with reviving the entire intelligent civilization and, after finding a new habitat, resurrecting their kinds.

This difficult decision allowed the invader population to survive.

At the same time, it has also led to population fragmentation.

The solar system is not the first microuniverse discovered by the invaders, but the fourth. Prior to this, the invaders had discovered three micro-universes, conquered these three micro-universes, eliminated the intelligent life in these micro-universes, and turned these micro-universes into their own colonies.

It's just that not all of the surviving invaders wanted to resurrect their compatriots.

In fact, the invaders who survived and opened up their territory became a new population in their own right, and allowed their population to grow.

What's more, other micro-universes also have limited resources.

Obviously, if those self-sacrificing compatriots are resurrected, even if the solar system is counted, the resources of the four microverses will not be enough to resurrect all intelligent individuals.

As a result, the invaders broke out into civil war.

Part of the insistence on traditional beliefs calls for the resurrection of compatriots who had made self-sacrifice in the encroached micro-universe in accordance with the agreement of population self-determination. Persisting in pioneering is part of the need to obtain the right to self-development and to look to the future, rather than bearing the burden of history. There are also some who remain neutral, believing that such a rash decision should not be made, and that they should be more proactive in exploring the living space.

It was the civil war of the invaders that changed the fate of humanity.

Obviously, for the invaders, the threat of civil war far outweighs that of an intelligent civilization that has not yet entered the stage of self-evolution.

At a time when human civilization was about to be wiped out, the invaders left the solar system.

However, the invaders did not abandon the solar system because of this, but left behind the spokesperson named Feist, who continued to take care of the solar system and waited for the day when the invaders returned.