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Most people's understanding of the cosmic dimension is three dimensions plus the dimension of time, for a total of four dimensions.
Within the framework of string theory in modern physics, the universe actually needs to be described in ten dimensionsIt sounds a bit unreliable, but this theory is rooted in rigorous mathematical and physical derivation, and it is a real science!
十维宇宙里到底是什么？为什么科学家说，一旦人类进入十维空间，就会既死亡又永恒呢？
To understand the concept of the ten-dimensional universe, we must first talk about string theory, which scientists believe that the basic unit of matter is not particles, but things like strings, and particles are produced because of the vibration of strings, but string theory has a very tricky requirement, it is only true in ten-dimensional space.
The three-dimensional space plus time of human cognition is obviously not enough, so where are the remaining six dimensions?
The secret lies in the geometrical structure of the Calabi-Yau manifold, which scientists believe can hide six additional dimensions well, and mathematician Yau Chengtong proved that the Calabi-Yau manifold is real through rigorous mathematical derivation.
Those extra dimensions are not gone, but because they are extremely small, huddled in small geometries that are invisible to our naked eyes, these hidden dimensions, although invisible, determine to a certain extent the physical laws of the universe and the properties of various particles.
Calabi-Yau manifolds in physics have become an indispensable part of explaining string theory, and although we can only perceive four dimensions in our daily lives, hidden dimensions may be silently playing their role in all corners of the universe.
Although this theory sounds mysterious now, isn't human physics constantly advancing in hypotheses and conjectures? There are many complex and difficult concepts in history that have been proven in the end.
While we can't directly observe these extra dimensions at the moment, scientists are looking for clues to them through the Large Hadron Collider experiment, and if we can find evidence that these extra dimensions actually exist, it could revolutionize our understanding of the universe.
How can you add from zero to ten dimensions step by step?
Zero-dimensional is a point that has no length, width or height, except for this solitary point, there is nothing in the zero-dimensional space.
One-dimensionality is also well understood, it is a line composed of countless zero-dimensional points, only the length without width and height.
The two-dimensional is a flat surface like paper, which increases the width compared to the one-dimensional, but still has no height, and these three dimensions are easy for us three-dimensional creatures to understand, after all, it is not difficult to see a line or a plane in daily life.
Three-dimensional space is the space we are familiar with in daily life, the three-dimensional world we see is composed of three dimensions of length, width and height, everything in this space has volume, whether it is tables, chairs, benches or the human body are three-dimensional.
In fact, all space is formed by the convergence of points, and zero dimension is the basis of all space, whether discussing high or low dimensions, points are the basic elements that constitute space.
Things are even more complicated in the fourth dimension, which adds a time dimension to the three-dimensional basis, and the state of any object in space becomes a dynamic process with time, and the position is different one minute ago and one minute later.
在四维空间中时间是可以观察的维度，虽然还不能改变时间的流向，但已经可以一眼万年。
The fifth dimension already allows us to choose between different timelines, and the time in the four-dimensional space is a fixed line, and everything happens in order.
In the five-dimensional space, different timelines will be generated according to different choices, which is the concept of parallel universes often mentioned in science fiction movies, and the proverb that time is gone forever will become a paradox in the five-dimensional space, and each choice will give birth to a new timeline.
The six-dimensional space is more complicated, it can connect different possibilities, although there are many different timelines in the five-dimensional space, but these timelines are almost uncrossable, the six-dimensional space can communicate directly between different timelines, for the creatures in the six-dimensional space, crossing time and space is as simple as us crossing the road.
Everything in the seven-dimensional space is already difficult for us to understand, and the seven-dimensional space contains all possible universes.
The physical laws of these universes may be completely different from the world we are familiar with, the existing physical foundation of mankind may completely collapse, there may be a universe without gravity, and some universes may also turn back time.
The eight-dimensional space is an infinite set of these different universes, and each point in the eight dimensions represents a complete universe, and these universes are also developing according to completely different laws of physics.
The nine-dimensional space not only contains all possible universes, but also allows these universes to interact in various ways, and different universes are like different ant houses in the eyes of the nine-dimensional creatures, and they can observe these worlds from the perspective of God, and they are god-like beings.
那十维呢？十维空间到底有什么？为什么科学家说一旦进入十维空间，人类就会处于既死亡又永恒的状态？
If the previous dimensions are not easy to understand, then the ten dimensions are equivalent to directly pressing reason and intuition on the ground and rubbing it.
According to the understanding of string theory, the ten-dimensional space contains all possibilities, that is, the sum of all universes, all timelines and all physical laws, and this space will be far beyond human imagination.
It encompasses everything and eventually forms the ultimate dimension, and the ten-dimensional space is the collection of all possibilities, each possibility exists at the same time, and there is no more if but, because everything is already here.
Physicists speculate that the existence of ten-dimensional space is due to the fact that string theory requires an ultimate dimension to unify all the fundamental forces in nature, and in the case of low dimensions, the performance of these fundamental forces is different and difficult to unify, but all forces in ten-dimensional space can find a common way of describing.
The description of ten-dimensional space became a central selling point of string theory.
Since the ten-dimensional space contains all possibilities, the distinction between time and space has disappeared in the ten-dimensional space. Everything happens at the same time, and any change in choice or historical future converges here.
The ten-dimensional space with such characteristics has also become an extremely special existence, and it is almost an incomprehensible paradox for us beings who take the three-dimensional space as the basis of their lives.
Why, then, is it that once a person enters the ten-dimensional space, he is in a state of both death and eternity? This sentence sounds a bit contradictory, but it becomes the most reasonable inference within the framework of ten-dimensional space.
We are accustomed to seeing life as a process on a timeline, from birth to growth to aging and death, time can only flow forward, and each stage is happening linearly, which is our basic experience in the four-dimensional space.
在十维空间里的时间将不再是个线性的东西，所有的时间点都同时存在，没有所谓的过去现在和未来，所以时间线的概念在十维空间是直接崩塌掉的。
When all points in time exist at the same time, the lifespan in the traditional sense is gone, and every possible state and every moment of human beings exists in the ten-dimensional space at the same time, and the so-called life and death have long lost their practical meaning.
Every state of life has become an established fact there, and there is no limitation of the timeline, so the living form that enters the ten-dimensional space cannot be called a living body, and the passage of time without birth, old age, sickness and death has also become an eternal established fact, and every moment exists but no longer happens in chronological order.
The ten-dimensional state of being both dead and eternal is not only a problem for physics, but also a great problem for philosophy and human understanding.
In traditional philosophy, life and death are opposites, and there is life and death, but the ten-dimensional space breaks this opposition, and death and eternity in that dimension are not opposites, but just the fact that they exist at the same time.
This phenomenon has surpassed the ability of human beings to understand now, we are used to thinking about time in a linear way in the four-dimensional space-time, but time in the ten-dimensional space is presented in a panoramic way, and time no longer has a sequence, although it can be understood literally, but how to exist in the ten-dimensional space has exceeded our imagination.
Since the ten-dimensional space is very far away from our current lives, why do scientists still propose this concept, and is there any other meaning than to find a macroscopic framework for all theories?
对于十维空间的探索其实就是人类探索宇宙的终极奥义，虽然人类现在已经进入了科技时代，但是对宇宙的认知或许还不到万分之一，宇宙的法则远比我们的感知要复杂得多。
The ten-dimensional space is to tell us that although daily experience can be helpful to life, we should not take daily experience as a guideline, otherwise we will miss many key things.
十维空间的研究也在推动理论物理学发展，可以为人类的未来发展提供一些新的可能性，虽然有了理论基础，但十维空间的真实样子科学家也不知道，只能在探索中不断发现，而这些新的发现或许将对未来的技术应用产生深远影响。
Although we cannot directly observe the ten-dimensional space, scientists have been working hard in various fields.
CERN's Large Hadron Collider is looking for evidence of high-dimensional space, and although there are no conclusive results yet, as technology advances, we will eventually get a glimpse of the truth of this ultimate dimension.
Human thinking is always imprisoned by time and space, we are accustomed to living in the four-dimensional space, and we are used to using three-dimensional space and limited time to explain everything, but the universe is so big that if we have to explain the universe according to the existing human cognition, then human beings will never be able to peek into the mysteries of the universe.