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A particular theory that many have pondered revolves around whether a multiverse actually exists. I read something pertaining to this a while back, and have since wondered about it. It’s something that physicists have poured research into for quite some time now. Although this theory is related more to physics, it’s still one that I like to think about with regards to our universe.

In summary, the multiverse theory states that there are many universes that exist separate from our own. The theory is based on the notion that what we consider to be the universe, is actually a very small component of a vast grouping of universes. And these groups of universes can also be never ending or infinite. These other possible universes consist of everything that exists or could exist; things like matter, energy, time, and space. Within a multiverse exists infinitely many universes, these universes are what are sometimes referred to as “parallel universes”.

These parallel universes linger just beyond our ability to observe them. The idea comes from the possibility that there are many more dimensions to the world than just those of space and time. For instance, imagine another Earth, where there’s another you, and another me, just floating around somewhere beyond our limit of observation. One other small wrinkle to this theory is that these parallel universes aren’t actually parallel at all, but they sometimes slam into each other causing a Big Bang and forcing these colliding universes to reset again and again.

When scientists first discovered that there were many more galaxies than just our own, our universe instantaneously got a whole lot bigger. With that same reasoning, the multiverse is just the same. It’s the idea that there is more than one reality beyond what we can observe. Realities we can only dream of. What if other realities wonder if something like us exists?

Hints of the existence of a multiverse lie in other scientific ideas as well. Ideas like the metric expansion of space, or eternal inflation. As such, metric expansion of space explains how the universe is accelerating in its expansion. Due to the growing expansion rate, the part of the universe that we can observe will keep getting smaller and smaller as things go beyond what’s called, the Hubble sphere. This is the sphere of everything that scientists can observe. Eternal inflation refers to the theory of chaotic inflation, where inflation is going on forever. Some inflationary regions of space expand faster than others, and because they expand faster, you can get different regions of space. Essentially, what’s referred to as “pocket regions” emerge. Who knows what exists in these pocket regions?

The idea of different worlds and dimensions floating around might seem strange to you, however, the multiverse theory is just that, a theory. After all, it isn’t just some random idea that physicists came up with, there are tons of ideas that point to multiple universes. Some experts even believe chances are high that hidden universes actually exist.

I encourage you to watch this video that explains what a multiverse actually is a bit more in depth.