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Only one dimension has disappeared from reality: depth. Your body has become completely flat. You can't turn around and your blood has stopped flowing because your veins no longer have the volume. But these are mere trifles compared to what awaits you in the fourth, fifth, and seventh dimensions. Today we will stretch your body from the zeroth dimension to the seventh, where the human brain simply shuts down. One important note. Before we go any further, the higher we climb, the more we will use dimensions as a metaphor to visualize levels of reality that we cannot see directly. But first, the basics. What is a measurement? Forget about
portals and magical worlds. In the simplest sense. A dimension is an independent direction or degree of freedom used to determine the position of an object. In the 17th century, Rencard gave us a convenient language for this using a coordinate system. Geometry of space from 0D to 3D. 0D - zero dimension. When we fall to the very bottom of the zeroth dimension, you have exactly zero directions to go. If we forcefully compress a body into zero dimension, there will be no shape left, only a coordinate. A mathematical point without dimension. In such a world there is no room for movement, and the very idea of movement loses its meaning.
Absolute claustrophobia. You supposedly exist, but to the rest of the universe you simply don't exist. Let's take a step up to the first dimension. We are given exactly one degree of freedom. You become an infinitely thin line. Now you have the length. And you can only move forward or backward. And that's all. You cannot turn back or go around the obstacle. If someone else appears on this axis before you, you will simply be stuck forever. The concepts of up or sideways simply do not exist here. You're not just stuck on a line, you've become a being for whom any obstacle is the end of the universe.
We take this line and stretch it at a 90° angle. Welcome to the second dimension, the plane. Now you have the length and width. Your whole world looks like a drawing on a piece of paper. But the most interesting thing here is how you perceive this world. In 1884, mathematician Edwin A. Abbott suggested a useful way to visualize this. For the sake of simplicity, remember the main rule. A being usually perceives the world through projections and cross-sections one dimension below itself. If a 2D character on paper looks at a drawn circle, they won't see the circle. Imagine that you have placed your right eye on a level
table surface and are looking from the side at a coin lying flat. You won't see a round shape, you'll just see a striped horizontal line. In a flat world, absolutely everything looks like segments of different lengths. To understand that what lies ahead is a circle, not a square, a flat creature would have to physically walk around its perimeter. Only then could she understand the true form of the object. If this 2D character draws a square house around himself, he will be completely safe from other flat creatures. For them, he disappeared behind the wall. But we, beings from the 3D world, look at this sheet of paper from above. We see everything at the same time: the walls of the flat house and the character inside. We can simply
lower our finger from our third dimension and touch the character without destroying the walls. Your house may be a fortress against your neighbors, but to the creature above, it's an open box. Remember this paradox. We will need it soon. 3D. The third dimension. Now let's extend this plane upwards at a 90° angle. Welcome to our cozy three-dimensional world. Physicist Paul Ehrenfest demonstrated that if there were more than three spatial dimensions, the usual laws of gravity would change so radically that stable planetary orbits and atoms would become impossible. This is where depth appears. But because of the same rule of vision, we live in a total illusion. Strictly speaking, our eyes do not receive a ready-made 3D image. A
striped 2D image falls on the retina, and the brain itself restores the sense of depth based on the difference between the image from two eyes, perspective, and shadows. You see a closed safe, but you don't see what's inside. Look at your monitor. You can't see what's behind it until you go around it. In the 3D world, we only see the outer shells of things, to see what's inside, we have to break the shape. Now let's take a step into the fourth dimension. We add one more coordinate, independent of the three spatial ones. We can't depict it on the screen like a regular direction, but in physics, time often plays the role of this coordinate. In
1908, Hermann Minkowski proposed considering space and time as a single structure. In 4D, time ceases to be an abstract flow. The easiest way to understand this is with the help of a timeline in a video editing program. The viewer watches the video frame by frame, while the creator sees the entire video feed unfolded on the screen at once. A 4D being looks at our 3D universe exactly the same way we looked at that flat sheet of paper. She sees everything at once. If a 4D being can interact with different time periods, they don't need to crack the safe today. She just reaches back to that moment yesterday when the door was open. For those of you locked in now, the object will simply disappear from the locked
safe. So what's happening to your body? You are no longer a person who lives life second by second. Since time is now a physical direction, your body is forever stretched along it. Imagine a giant, continuous, spatial time wormhole made up of millions of copies of yourself. At one end of this structure is the birth of a baby. Further. This long body stretches through space. Here it goes to school. Here he is sitting on a chair right now. And ultimately ends with an elderly person taking their last breath. In 4D there is no past, no future, no movement. There is only this giant frozen monolith of your life from beginning to
end. To a four-dimensional being, your life is not a story, it is an object. But a 4D monolith is just one rigidly fixed line. Let's take a step into the fifth dimension. And here we move from strict geometry to a convenient scientific metaphor. What could be the next direction after time? Possibility. The axis of alternative outcomes in quantum mechanics. This is Huvert's many-worlds interpretation In 4D, you only had one fate. And if we imagine every event and every choice as a crossroads, then in the fifth dimension your time worm bifurcates at the moment of each outcome. Then again and again your body in 5D transforms into a colossal fractal, branching out endlessly, like a giant tree.
A perfect example of how this happens is video games, where every new clone on the base is you who went down an alternative branch. Or massive story flowcharts in games like Detroit Become Human. The branch where you become a millionaire. The branch where you are not born at all and the branch where you are watching this video right now exist simultaneously. For a fifth-dimensional being, there is no concept of fate or inevitability. She sees this entire fractal of your lives as one whole. You are no longer one person. You are a forest of all the people you could become. Moreover, for her, these alternative realities are not separate worlds. These are simply different
directions in space. But even this infinite fractal of lives is limited by the laws of our physics. So we collapse your entire giant probability tree back into a single point and draw another perpendicular axis from it. Welcome to the sixth dimension. In some versions of string theory, entire landscapes of possible universes emerge. For this video, we can imagine it as the next level. No longer different fates within the same physics, but completely different laws of physics. There are universes with completely different fundamental constants. Worlds where gravity is thousands of times stronger, worlds with a different speed of light, and worlds where atoms fundamentally cannot form bonds.
And at this point, the concept of anatomy completely loses its meaning. A body is only possible where the appropriate laws exist, such as the right chemistry, stable bonds, and enough time for processes to unfold. In the sixth dimension, nothing remains of your body. You are no longer a human, you are no longer a branched worm. You become pure information or an abstract mathematical structure that binds the concept of your existence into all possible variations of physical laws. To reach the seventh dimension, we take this entire infinite network of 6D universes with different laws of physics. we collapse it into a single point and stop. The seventh dimension in this scenario is a
non-specific physical axis, and the final metaphor is the space of all logically possible realities. I repeat once again: the space of all logically possible realities. In the seventh dimension, the very concept of existence or event loses meaning. This space contains absolutely everything at the same time. All possible universes, all conceivable and unimaginable laws of physics, all timelines from the beginning to the end of time. There is no action there. Action requires change, and change requires habitual time. But in the seven de, nothing is created and nothing disappears, because everything that could logically exist is already forever fixed in this structure. This is not a process. This is an absolute
infinite frozen map of everything. This is not just a library of books. It is a library of all possible alphabets, all languages, all stories, all the laws by which these stories could be written. So why do n't we move on? Because at this point, human logic reaches its limit. The mathematics of string theory allows us to calculate the eighth, 10th, 11th dimensions. But there, these axes are microscopic, collapsed spaces. It is physically impossible to write them in macroscopic terms. Our brains evolved to hide from predators in a three-dimensional world, not to comprehend absolute infinity. So let's go back. Exhale and look around. The walls of your room are solid again. Your time only moves forward, and whatever is inside a
closed safe or behind your back remains a mystery to you because you only see the flat 2D shell of things. We live in a very narrow, limited, but perfectly balanced geometric incubator. Enjoy this 3D illusion. And before your time worm reaches its end, subscribe to the channel and give it a like. See you next time. Yeah.
