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Parallel Universes

Cosmologists argue the theory that our Universe is one of many universes comprising a much larger "multiverse".
Once a subject of science fiction. Parallel Universe theories are being acknowledged by physicists and cosmologists the world over.
As outlandish and far-fetched as it sounds, it might just be true.
There could be another version of me, in another universe who decided not to create an astronomy wapsite on peperonity and thus, the other astronomy sites herein would undoubtedly have not been spawned, in particulaly, the site which began its existance as an EXACT carbon copy of this very site.
Alas, in this Universe, i did decide to create an astronomy wapsite as opposed to a wapsite about penquins or cross stitch.
Cosmologists theorize that our Universe was created in the big bang, alongside countless possible other universes.
Before the big bang, there was what is referred to as a repulsive, or "false" vacuum. It expanded in all directions at an accelerating rate because the more vacuum there was, the more repulsion there was.
The inflationary vacuum was unstable and it eventually decayed into the normal vacuum which is around us today.
The vacuum contains a tremendous amount of energy. The energy was dumped into our Universe from some other place to create the terrific fireball of the Big Bang.
Everything that we see around us today was conjured from the vacuum.
We know that the universe stretches far beyond the limits of our telescopes. At present, our "horizon" is about 14 billion light-years. We call a sphere of that radius a Hubble volume.
Observers 100 billion light years away would inhabit a completely different Hubble volume than ours.
Our Universe contains at least 1,000 seperate Hubble volumes.
According to inflation theory, the universe stays flat forever (meaning that it doesn't expand too fast so stars and galaxies don't form and it doesn't expand too slowly for the Big Crunch to occur-the Big Bang in reverse).
The universe is infinite, and strange things can happen in infinite space. Such a universe would have an infinite number of observable universes, or "O-regions". Each of these spatially finite O-regions has a finite number of possible histories. History thus repeats itself, over and over.
Whenever a thought crosses your mind that some terrible calamity might have happened. you can be sure it has happened in some of the O-regions.
If you narrowly escaped an accident, you were not so lucky in other regions with the same prior history.
Inflation, the explosive growth that started and stopped before our Universe was less than a second old, never really ended. It stopped in our region, of course, giving rise to the bubble universe (or O-region) we call home. This process may continue elsewhere, spawning multiple new bubble universes along the way.
Inflation has been compared to islands popping into existence in a vast sea. Or, Swiss cheese. Each hole represents a bubble universe. The cheese represents the space between the bubbles and is expanding faster than the speed of light. Not only do the bubbles get further and further apart, new bubbles keep forming within the cheese. The result of new Big Bangs popping off in a never-ending chain reaction. Eternal inflation doesn't just produce an oversized hunk of cheese; it produces a multiverse.
Inflation is a mathematical theory that predicts a multiverse.
Inflation predicts an infinite number of regions similar to our observable Universe, and it also predicts that the seeds of galaxies were random. This means that in the next bubble region the seeds were probably placed differently, which means that the history of that universe is different, and the galaxies that formed are not exactly the same as ours. We can say the same about the next region, and the next.
The Universe is quantum, which means "chunk". It refers to the fact that everything, even space and time, comes in tiny. indivisible grains.
If we could look at space with some kind of super-microscope, it would resolve itself into a grid of cubes. For simplicity, think of it as the two-dimensional grid of squares on a chess board. In this picture, we might have a seed of matter on one square, another seed on another square and so on.
There is only a finite number of ways of arranging the seeds on the board, just as there are only a finite number of ways of arranging the pieces on a chess board. So there are a finite number of possible histories for a universe, leading to a finite number of possible arrangements of galaxies.
Fundamentally, if there are an infinite number of regions like our observable Universe, but only a finite number of histories for such regions, then every possible history happens an infinite number of times.
There are an infinite number of places in the Universe where dinosaurs were not wiped out.
There are an infinite number of places in the Universe where ants govern the world.
There are an infinite number of regions in the Universe exactly the same as the observable Universe. Each containing a perfect copy of you who, up until this instant, has experienced everything you have ever experienced.

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