Thursday, December 5, 2013

Karla Valcárcel Martínez: The Multiverse: Parallel Universes

In 1895, American philosopher and psychologist developed a term for describing the hypothetical set of infinite or finite possible universes that, together, comprise the entirety of space, time, matter and energy: a “multiverse” or “meta-universe.” Theoretically, within this multiverse, there exist various universes, known as “parallel universes.” According to cosmologist Max Tegmark and theoretical physicist Brian Greene, there are various types and levels of parallel universes.

On one hand, Max Tegmark hypothesized that parallel universes are subdivided into four distinct levels, one leading to the next. Level I parallel universes, according to Tegmark, are described as, in an infinite universe, there would be an infinite amount of planets, some of which would have the exact same events occurring in the exact same manner. For example, in a Level I parallel universe, there would be an infinite amount of planets identical to Earth, on which an infinite amount of people are reading this article, just as you are.

Following a Level I parallel universe is the Level II parallel universe, in which, according to Tegmark, the regions of space between universes is expanding faster than the speed of light, causing parallel universes to be virtually unreachable from our current universe. However, the second possibility for a Level II parallel universe is that each universe is colliding at distinct multiple locations with an infinite amount of universes, where each collision creates its own universe based on the initial conditions of the collision. Either possibility will lead to the conclusion that other universes are in other locations, mostly unreachable ones. 

Furthermore, after a Level I and Level II parallel universe, there is the Level III parallel universe, which is the most commonly known level. According to Tegmark, this level of universe will be in continuous contact with our current universe; every single moment in a person’s life, every small or large decision that person makes, will create a parallel universe. For example, if, today, you decide to drink water, instead of Coca-Cola, a parallel universe will be created, in which you decided to drink Coca-Cola, instead of water. This implies that there are an infinite amount of universes, as many decisions are not as simple as having two options, and each decision will imply more and more decisions along the way. 

Finally, after a Level I, Level II, and Level III parallel universe, one will find the Level IV parallel universe, which, according to Tegmark, is the most bizarre occurrence, as it is based on the mathematical democracy principle: “Any universe that is mathematically possible has equal possibility of actually existing.” Basically, these distinct universes would follow different mathematical laws of nature, as opposed to our current universe, implying that any imaginable universe (that is, indeed, possible by nature) has a large possibility of existing. 

Regardless of how interesting and well-developed these theories may be, many scientists and the general public tends to believe that the possibility of a multiverse is far-fetched, if not ridiculous, seeing as though there is no concrete form of explaining or providing evidence for the theories, mostly due to the statement parallel universes would be virtually unreachable.  Thusly, the theories of multiverses are at many times deemed “unscientific” and more of a philosophical speculation. 

However, in my opinion, the existence of parallel universes is possible, as the universe is vast and unexplored, there could indeed exist undiscovered evidence of a multiverse interaction, or maybe even possibilities of actually reaching these other universes. Why not? 

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