In physics, D denotes the number of spatial dimensions. Interest in M-theory has also led physicists to answer the question of whether life is possible at higher or lower levels. If space were one-dimensional, then life would not exist.

The fifth ball of the universe

Because the universe would be insignificant. When physicists have tried to apply quantum theory to a generally one-dimensional universe, we have seen particles pass through each other without interacting. So a one-dimensional universe seems unsuitable for life. Because the particles there cannot combine with each other to form increasingly complex objects.

We also have problems in two spatial dimensions. Because, there the structure of prana would probably have fragmented. Let's imagine a two-dimensional species, those who are flat; They are called flatlanders. They live on a table. Imagine eating them.

The path from the face to their back will split the flatlander in two. He will be torn to pieces. So it is hard to imagine how a flatlander could survive as a complex organism without fragmenting. Theoretical physicist Stephen Hawking illustrated this in his book A Brief History of Time.

Another argument from biology suggests that intelligence cannot exist in less than three dimensions. Our brain contains a large number of overlapping or intersecting neurons, which are connected through a large electrical network. If the universe were one- or two-dimensional, it would be difficult to construct complex neural networks. Especially if they were stacked on top of each other, a short circuit would occur between them.

We were severely limited by the number of low-complexity logic circuits and the large number of neurons we could fit into a small space. For example, our brain has about 100 billion neurons. Its amount is equal to the number of stars in the Milky Way galaxy. Each neuron is connected to about 10,000 other neurons. Such complexity is very difficult to bring down.

There is another kind of problem in the four dimensions. In the four dimensions the planets are not stable in their orbits around the Sun. Newton's inverse square formula has to be replaced here with the inverse cubic formula. What physics might be like in other dimensions was predicted in 1917 by Einstein's close colleague Paul Ehrenfest. His analysis is now called the Poisson–Laplace equation (which governs the atomic electric charge along with the motion of planetary bodies).

He found that orbits are not stable in four spatial dimensions or beyond. Because, in it, the electrons of the atoms and similarly the planets collide again and again. This simply means that the atom and the solar system cannot possibly survive at higher levels. In other words, three dimensions are actually something special.

Physicist Freeman Dyson once said, 'It's as if the universe knew we were coming.' This is an example of the strong anthropic principal. The idea is that the fine-tuning of physical constants is not an accident, but rather indicates some kind of design or design. However, Martin Reese and other scientists believe that these cosmic accidents actually provide proof of the existence of the multiverse.

According to Ridge, the only solution to the incredibly small scale in which we live among hundreds of coincidences is to admit the existence of billions of parallel universes. Most of the universes in the countless multiverses are probably dead. Protons may not be stable there, or atoms may not have formed, DNA may not have formed. Those universes either collapsed prematurely or froze almost immediately.

But a series of cosmic accidents have occurred in our universe. Reese thinks this is because of the rule of averages. "If there's a huge inventory of clothes, it's no surprise to find a suit that fits," he says. If there are multiple universes, each governed by a different set of numbers, then there will be one that is governed by a specific set of numbers suitable for life. We are one of them.'

Scientists have actually compiled a long list of many such satisfying cosmic accidents. Faced with this impressive list, one is amazed at how many known cosmological constants have made life possible on such a small scale. If even one of these accidents were to change, the star would never have formed. The universe would have simply disintegrated, DNA would have ceased to exist, life would have become impossible, the world would have collapsed. What else could be said then, 'hundreds of years from today/ who are you reading sitting in my poem/ curiously'?