What happened before the Big Bang?

Most scientists and professors tend to answer that it is a meaningless question, that there was nothing before and that the Big Bang was the beginning of everything, of space, time, and matter. Therefore, it makes no sense to ask what came before the Big Bang; there was nothing. For example, Stephen Hawking said that asking what happened before the Big Bang is meaningless. He compared it to asking what lies north of the North Pole, when at the North Pole all directions point south, so the answer is that there is no further north.

Even so, they are acknowledging that if there is no time, there cannot be a “before” in the temporal sense that we know. We could also conclude that there may be something where time did not exist. I don't think Stephen Hawking gave a very good example, and I think that what he really meant to say was “I have no idea,” without saying that he had no idea, although in practice, he was giving an answer.

Before the Big Bang, there could have been something where there was no time, because time is ultimately a dimension, and dimensions can be extremely complex. but the truth is that, with the current laws of physics, which we use to describe the universe, such as Albert Einstein's general relativity, we can only go as far as the initial singularity, what we call the Big Bang or the cosmic egg, as the Belgian priest Lemetre called it.

At the moment, with the laws we have, we cannot in principle calculate or predict what was there before in space and time before it existed, before that singularity or maybe yes, because on June 23 a report was published where they study the pre-Big Bang, what there was shortly before the Big Bang, and it is not the only one, this is one of the two recent investigations into what there was before the Big Bang. Big Bang, this would focus on the pre-Big Bang.

What Josu C. Aurrekoetxea and the rest of his team did was use complex computer simulations in order to numerically solve Einstein's equations for gravity in extreme situations, such as the singularity that gave rise to the Big Bang and the pre-Big Bang. The researchers used numerical relativity. Numerical relativity was born in the late 60s, but at that time it did not have the powerful tool of current computers and in the near future, with quantum computers, numerical relativity, I am sure it will be able to open the doors to finding the solution to the most important questions of the universe, including, what happened before the Big Bang? or if we live in a multiverse or if our universe collided with a neighboring cosmos, or if our universe went through a series of explosions and expansions or rebounds or cycles, everything raised so far.

Albert Einstein's equations of general relativity work very well to understand how gravity and the movement of cosmic objects work, but if we go back far enough in time, we end up reaching the singularity, a state of density and infinite temperatures where laws and physics fall apart. The Big Bang, which curiously is a type of singularity similar to the one that is supposed to exist in a black hole.

One of the old enigmas and it still is cosmic inflation, a period of rapid expansion of the universe, an expansion that occurred at a very specific and very small moment, but this expansion, this inflation serves to explain the universe that we currently have, although it is only a patch because no one has been able to explain so far how or why the universe experienced that sudden and brief accelerated growth, and of course, no one has been able to explain why that accelerated growth stopped at the right moment, because if it had not stopped, now the universe would be much more gigantic. and nothing would exist, nothing more than atomic particles separated by millions of kilometers from each other.

It could also help explain the issue of cosmic strings and colliding universes. According to these researchers, perhaps the cosmos is cyclical and experiences rebounds from old to new universes, experiencing repeated rebirths or big bangs, in plural or Big Crunch, that is, contractions, this is a difficult problem to solve analytically, but according to these researchers, with numerical relativity and new computers the equations could be solved and an answer reached.

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