The interconnected multiverse or parallel world is the perfect storytelling vehicle for science fiction stories, allowing different versions of characters to live together in the same space. Do parallel worlds like that really exist?
Spoiler Alert! This article may contain spoilers for Spider-man: No Way Home
In Spider-man: No Way Home, Tom Holland, who plays Spider-Man, meets other versions of Spider-Man and villains from other universes. They enter Tom Holland's Spider-Man universe through an interdimensional portal created by Doctor Strange's powers.
In theoretical physics, this is referred to as a multiverse or parallel world. Where there is more than one universe in the world. That is, there are many versions of ourselves in different universes.
The concept of a parallel world or multiverse is not only adopted in the Spider-man films but also in the adaptations of many science fiction films. However, is it possible that parallel worlds like in the Spider-man movies, really exist or are they just science fiction?
Quoted from Syfy, Friday (12/24/2021) the concept of the multiverse world does sound like bullshit. But believe it or not, there are pretty good reasons for scientists to believe that a multiverse could exist. But to explain it, we have to go back to the beginning of the universe, very, very early.
Before the early times, there might not have been anything in this universe. Shortly after the Big Bang, which lasted only a fraction of a second, the universe expanded due to a process known as cosmic inflation, then immediately cooled its jets.
When that period ended, the universe was much bigger than before. Exactly, how big the universe was at that time largely depended on how big it started.
What is important in the context of this discussion is that inflation does occur. This helps to explain a lot about the nature of our universe. That is, explaining the temperature patterns in the cosmic microwave background. Distant areas can have a similar composition because only a fraction of a second ago they were smoothed right next to each other.
Perhaps this kind of expansion is the stopper of the eternal cosmic process. If eternal inflation occurred, it would mean that our universe is just a tiny bubble in an endless pattern of fractal reality.
And other tiny bubbles popping up periodically, creating a completely separate universe with its own physics, which may be completely different from ours or completely the same.
The process is repeated over and over again until we find an infinite number of universes. And since infinity itself is infinite, some of those universes must be identical to ours, or nearly the same.
Testing the multiverse parallel world
So, are there other universes separated by a rapidly expanding non-universe cosmic ocean. From a scientific point of view, of course, evidence that can be tested is needed. These ideas that can be questioned and validated are what make them scientific and not mere conjecture.
In that sense, the multiverse seems hard to code to be outside of this process. If other universes are physically separate from ours, that makes it quite difficult to push them around, to see how they work, or whether they really exist.
Some scientists believe that the existence of an inflationary process of the universe is evidence of a multiverse. Our planet at first glance seems very suitable for the emergence of life. Earth is located at the right distance from our star, and has the right atmosphere.
In addition, the Moon keeps our tilt steady, and the gas giant protects us from impacts. There are many things about our Solar System that seem to be well organized. If this is the only Solar System, it seems statistically improbable that things will go well.
There are a number of physical truths that, if any, would manifest as the end of the universe as we know it. Every possible universe has its own walls. The walls may rub against each other and cause holes. And from that hole, we can connect with other dimensions or universes.
Or maybe, we can connect to another universe by using a portal like the characters used in Spider-man: No Way Home.
What is clear, we know now that there are trillions of planetary systems and most likely many of them are not as well placed for the emergence of life as on Earth. At least one system will get the right chance among so many odd ones. The same may be true for the universe.