There are many views on the origin of the universe, but nowadays, the mainstream scientific community agrees with the Big Bang theory. Although this theory is not perfect and has flaws, it has strong evidence to support it. In the scientific system, evidence is a very critical link.
Theory of the universe emphasized that singularity suddenly expanded 13.8 billion years ago, and the universe was born. So what exactly is a singularity? Why can it hold so much material? You should know that everything we see now is the product of singularity.
In layman's terms, singularity is a hypothesis and a conjecture, which is more reflected in mathematical concepts. No one can tell what the singularity is, because the existing laws of nature have all failed in the face of singularity.
According to the speculation of the Big Bang theory, the singularity is a dense small dot with infinite size and infinite density. Just like the "one point" in the mathematical concept, this point does exist, but it has no size and of course it has no volume.
In our inherent thinking, anything is always volumetric, but the singularity is an exception, it has no volume. Therefore, we can also say that the singularity exists but does not exist.
The reason for its existence is simple, time and space both start from the singularity. It is said that it does not exist because it cannot be seen or touched, has no size or volume, and is an invisible existence.
But infinite things are always unpredictable, because infinite things are usually abstract, and we can only see limited concrete things in our lives. Once anything involves infinite, it will cause trouble.
But General Relativity tells us that singularity does exist, where is the end point of time and space, and time and space are infinitely distorted into a point.
singularity is not only the endpoint of time and space, but also the endpoint of existing physical theorems. Whether it is quantum mechanics or relativity, once it encounters a singularity, it will completely fail.
This is why many scientists prefer to believe that the singularity does not belong to our world at all. It is more like something in super-time and space, and cannot be interpreted by the four-dimensional space-time where we are.
If the singularity is really a product of super-time and space, the troubles brought to us by the singularity will be easy to understand, and it will be ridiculous for us to understand the singularity using common sense.
Just like if there are intelligent life in the two-dimensional world, it will be difficult for them to understand things in the three-dimensional space. There is an insurmountable gap between different dimensions and time and space!
