In 3918 AD, later generations known as the "father of dimensional space theory" and at that time was called "crazy" Marx. Dr. Payne verified the theory of "dimensional parallel" and proposed the existence of "parallel space", but it was not recognized by the vast majority of people at that time.

It was not until fifty-five years later, under the efforts of Marx, Dr. Payne's successor, that the first parallel space was discovered in AD 3973, and the entire human race began to gradually realize the feasibility of the "dimensional space theory" and the possibility of infinite expansion of the entire human space.

All the way to Marx. In the 200th anniversary of Dr. Payne's "dimensional space theory", after countless explorations, human beings found a total of six different dimensional Spaces where life exists, and named the first space in addition to the place where human beings have been living in accordance with human humanism. The other six Spaces are called the second space, the third space, and the fourth space in order of the discovery of time. The seventh space. The first space inhabited by humans is also known as the earthly realm.

The second space, strictly speaking, is not a complete space. The Sigma Naama Institute for Spacetime Research, which discovered it, did not initially think it was a dimensional space. The reason it is considered a fault between two Spaces is that the second space is a plane space.

It is not like the first space of human existence, which is composed of burning stars, planetary satellites around stars, and interstellar meteorite nebulae and so on, and then composed of huge galaxies to form the universe. It is only before and after, left and right, and there is no such a existence beyond human imagination. Although the second space is actually hundreds of millions of kilometers away from the nearest one. But in comparison, the four corners can not be seen in billions of light years can only be ignored.

The reason why the second space can be recognized as a dimension is because it is too similar to the environment of the earth, the vast and endless earth, stretching straight into eternity, to infinity. There are the same mountains, rivers and lakes, and the same changes of scenery, although it is very different from the earth; There is no sun, moon, or stars in the sky, but a brilliant halo of energy shines like a rainbow or a diamond.

The most surprising thing is that there is life in this space, and the life forms are very close to the organisms on the earth, if the strict division can also be separated from animals and plants, but because of the specificity of this space, the living organisms have strange abilities, some of which are very powerful, and even can fight against advanced firepower weapons.

In the third year of the discovery of the Second Space, under the strenuous search of the human exploration team, a large-scale gathering place of intelligent life was found at a distance of 167 million kilometers southeast of the entrance into the second space, and intelligent life with social system was found, and a total of 16 such gathering places were subsequently discovered.

The density of life in this cluster is of course much smaller than that of the bustling cities on Earth, but the scale is huge, with 16 clusters totaling more than 6 billion square kilometers and 400 million people of all races.

In the eyes of religious people, the situation of the second Yuan is like the legendary heaven where the gods live. Therefore, in the mouth of ordinary people, the second dimension is called heaven by them.

In 3998, the "Second Meta-Space Protection Act", commonly known as the "Celestial Law", was passed by the Space Administration, which did not disturb the indigenous inhabitants of the Celestial realm for any reason, and did not allow the indigenous inhabitants of the Celestial Realm to know that humans were aliens who had entered.

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The third space is the space most incomprehensible to mankind, this space, there is no "time". After countless studies by scientists, it has been found that there is life in this space, but their form of existence is beyond human understanding. And because of the different levels of their life forms and human life forms, the two kinds of life cannot communicate effectively.

According to this characteristic, the third space is called the chaotic dimension, and it is still the least understood dimension of mankind.

The fourth space is the place where arrogant and ignorant mankind is taught the hardest lesson. This space exists in much the same form as the first space in which humans live, but life is very different from the first space. In the star system at the entrance to the fourth space, there are 88 planets. On almost every planet, there is life in action, and the vitality is amazing.

The creatures in this space have incredible power, individual ability is very outstanding, a very small number of particularly powerful creatures have the ability to operate in space, and can freely enter and exit the planet in the interstellar space with individual ability. However, the creatures in this space have not formed a perfect social system, and they are still in a tribal form of racial aggregation.

After entering this space for the first time, a powerful creature with strong aggression launched a xenophobic attack on humanity, and the entire exploration team was destroyed at that time, and then invaded the first space from the space entrance broken by mankind, and mankind paid an extremely heavy price to repel these terrible enemies. Had it not been for the discovery of the Fifth space, in the subsequent second attack of the Fourth space, humanity might have led to a total genocide for its greatest discovery.

Therefore, when it comes to the fourth space, people call it the "demon realm". The entrance to the Fourth space has always had a large number of troops stationed to defend against the invasion of the "demon Realm" creatures.

The fifth space, in fact, human beings have discovered countless different dimensions over the years, but because each space has a vast airspace, human beings can not even explore the first space they live in, let alone other Spaces. Therefore, only Spaces where life is found will be noticed, but the fifth space is an exception.

There are no signs of life in the fifth space, but there are traces of higher civilizations. Studies have shown that this space, with the same structure as the first and fourth Spaces, once had an extremely prosperous and highly developed civilization, but perhaps it was a boom and decline, or war, or unfathomable disaster, which led to the complete extinction of species in this space.

From the current exploration shows that this civilization once reached a huge civilization based on the home star, radiating to dozens of galaxies, at present, the fifth space's scientific and technological development is the highest in all found space, at least more than a billion years earlier than the current human civilization.

It is precisely because of the discovery of the fifth space that human beings have obtained the technology handed down by the ancient civilization of different dimensions, which has greatly improved the scientific and technological level of human beings in a short period of time, thus greatly increasing the military strength of human beings, in order to repel the repeated invasions of the "demon realm". And since then, with the remnants of civilization obtained, mankind has developed its own technology, making human history a great leap forward.

"Future world" is the popular name for the fifth space in the public mouth. Some people call it the magic realm.

The sixth and seventh Spaces were discovered at the same time. In fact, the seventh space was not discovered by human beings, and at the same time that human beings discovered the sixth space, they found that there was another spatial interface in the sixth space; And this spatial interface leads to the seventh space.

The sixth space is inhabited by creatures whose living standards are probably in the barbarian era of human beings, but the civilization of the seventh space has developed several steps faster than human beings, and has established contact with the sixth space thousands of years ago, and has promoted its development. However, he has maintained his attitude of not intervening too much.

The Seventh space has never been visited by humans.