Could it be that without our universe there can exist other worlds beyond the limits of normal human perception? Could it be so, that there are parallel worlds in space and time, and that they are very different from ours?
This question is of equal interest to both fiction writers and scientists. Theoretically this is possible. For example, let's imagine a multi-family house with several dozen families. If the house has good sound insulation, then the family living in this building can completely disregard the existence of one another. In the same way, our world, a possible thing, exists alongside other worlds, and we do not suspect them of existence.
In theory, two parallel worlds can exist at a distance from each other. And yet they will exist in different space-time continuities. Our time will not be the time of the next world. Our space concepts will be completely different. For example, the parallel world will not exist in our past, present and future - it will exist in a completely different time. Similarly, the parallel world will not be close, far or far away. It will be completely different in space.
In theory, two parallel worlds can exist at a distance from each other. And yet they will exist in different space-time continuities. Our time will not be the time of the next world. The Parallel World of Concepts of Our Space does not necessarily correspond to the laws existing in other worlds. The laws of nature, which we consider to be self-evident, may not work in the parallel world. For example, it's easier to destroy than create our world. This observation is based on the principle that physical bodies tend to be completely chaotic.
If you collect coins from a jar, for example, half of them will drop into coins, others - in numbers. We are, of course, accustomed to this phenomenon, as it is ongoing. But let's imagine a world in which the pounding coins fall in strict rows, all in one direction. Although it's not possible to imagine something like this in our world, it will be the only possible alternative in the next world. It will be completely different. For example, the parallel world will not exist in our past, present and future - it will exist in a completely different time. Similarly, the parallel world will not be close, far or far away. It will be completely different in space.
The most widespread argument against parallel worlds: how can two worlds exist in one and the same place? The answer to this question lies in the analysis of what made our physical world. In essence, our world is made up of atoms that are spaced apart from each other. What is considered a solid object is, in fact, some kind of material, but more space is still in it. The book is a stone, a piece of lead - they are mostly not matter but space. If there is a chance to get the bricks of pure matter, it will weigh a few tones.
Even the earth, which seems to us to be strong enough, is made up mostly of space. In this way, there is enough space for several worlds. What looks like "empty" to us, in fact, may not be completely empty. Emptiness can be occupied with things that a person can not comprehend.
Other critics of the parallel world ask a different question: if other worlds exist around us, then do we not fully comprehend their existence? In answering this question, one can remember that there are many colors and sounds that do not understand human sensations. For example, human ears do not heed the high-frequency dog creeping, which the animals themselves hear at a great distance. It has also been found that bees can perceive the infrared color invisible to the human eye.
Imagine a person who does not have colors since birth. It will not even be possible for him to perceive what color is. It's possible for him to tell in full hours what is red, blue or green, but he will not be able to imagine the color. Despite this, everything around him will be colored, he just will not know about the existence of colors.
The theory of parallel worlds was raised in an attempt to explain the phenomenon of "flying saucers". They come from us not from other planets, but simply able to travel between us and other, invisible worlds.