Blogpost 4 : The Science of Parallel Universes

The concept of Parallel Universes or Multiverse always capture the attention of everyone in this world because it's something everyone of us dreamt of, having second chances for the choices or things we completely regret and things turn out differently. An alternative reality where you  have been the smartest guy in the world and you finally successfully plugged in your USB for the first try. But, is there really a scientific explanation for the existence of Parallel Universes? We all know that the universe is everything that there is. Now, if there are parallel universes, our universe doesn't represents what everything that there is but combined with parallel universes then they truly represents what everything is there is.

It's really controversial. We know that universe is everything but if there's other universes then then the universe we live in is not everything. The problem is that physicists mostly say Universe but they really mean is observable universe, a part of the universe that we have seen so far. Physicists call multi-observable universes  as multiverse. The word Multiverse in physics are three unassociated offered physical universes. None of which are proved by experiment.

When I was searching through the articles about the Multiverse, I saw an article entitled "Does the Multiverse exist?" by George F. R. Ellis in the site Scientifc American and it caught my attention and I read the whole article. The article talks about on how multiverse might exist. 

"Nearly all cosmologists today (including me) accept this type of multiverse, which Max Tegmark calls “level 1.” Yet some go further. They suggest completely different kinds of universes, with different physics, different histories, maybe different numbers of spatial dimensions. Most will be sterile, although some will be teeming with life. A chief proponent of this “level 2” multiverse is Alexander Vilenkin, who paints a dramatic picture of an infinite set of universes with an infinite number of galaxies, an infinite number of planets and an infinite number of people with your name who are reading this article." stated by George F. R. Ellis

The three multiverse models are Bubble theory, String theory and the Many-Worlds theory. The level 1 said by George explains the Bubble theory. The Bubble theory indicates that maybe there are other parts of the universe that which are very far that we will never see them or similarly like blackholes so that we cannot see them but just in another dimension. If each of this separate unseeable bubbles in the universe had slightly different laws of physics then meaning that we could only exist into the right physical laws that allows us to exist. 

The level 2 explains the String Theory. The String theory or also called extra dimensions proposed that our universe is actually just a three-dimensional surface that was implanted within a larger super-universe with 9 spatial dimension. Like a page of a magazine is it's own two-dimensional surface embedded in our three-dimensional world. If there is a larger super-universe with 9 spatial dimensions, then there are other three-dimensional surfaces around this super-universe since there's too much space. Like the pages of a magazine, were actually part of a bigger whole. Like the level 2, there are infinite number of universes around us since we are in a 9-dimensional universe.

Here's why Multiverse is very intriguing to everyone one of us. The last model of multiverse, the Many-world Theory. The many-world theory makes an attempt by explanation by proposing that every possible outcome to an event happens into another parallel world. If this is possible, then you can simply pick your adventure in all the universes out there where every possible happens. This kind of topic is very popular nowadays because many people regret their decision and wanted to renew it. 

I realized that Many-world theory is kinda similar to the Bubble theory because based on this theories anything can happen it's just that we exist in the series of events that was necessary for us to exist. Like we were destined to do this action even though we despised it. It's kind of hard to believe in this theories but it's okay since none of this theories are proven to exist, yet. We should expect that this theories may be proven or not in the future since it's theoretically possible or not for this theories to be true. If it's true, then maybe in another parallel universe you're not reading this blog.