Universe: Do Parallel Universes Really Exist?


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Is there life beyond Earth? A astronomy class with Dr Stuart Clark

Do we live in a parallel universe? - Business Insider

That is, there has to be a person identical to you reading this identical article right now in a universe identical to ours. Further, there have to be an infinite number of universes, and thus an infinite number of people identical to you in them. Yet few people have even heard of the parallel universes, or thought about the philosophical and ethical implications of their existence. The free will question arises because the equations of physics are deterministic.

Everything that you do today was determined by the initial state of all the universes at the beginning of time.

But the equations of quantum mechanics say that although the future behavior of all the universes are determined exactly, it is also determined that in the various universes, the identical yous will make different choices at each instant, and thus the universes will differentiate over time. Say you are in an ice cream shop, trying to choose between vanilla and strawberry. What is determined is that in one world you will choose vanilla and in another you will choose strawberry.

But before the two yous make the choice, you two are exactly identical. The concept of parallel universes is an idea that arises from the multiverse theory, suggesting that our universe is one of many existing universes that, in a manner of speaking, lie parallel to each other. Max Tegmark, a professor at MIT Massachusetts Institution Technology , has cleverly put out the idea that there are four distinct types of parallel universe.

Building on this notion, Dr. Michio Kaku has suggested that if these ideas become reality, depending on which one of the four types of parallel universes that truly exist, there are virtual copies of you in another region of space. One interesting aspect of this to consider, which catches the attention of scientists and philosophers alike, is the issue of morality.


  1. More in this section.
  2. La vida secreta de los perros infieles (Spanish Edition).
  3. Why there might be many more universes besides our own.

How is this relevant? Well; to paraphrase Dr. Max Tegmarks four levels of parallel universes:.

Arguing for a multiverse

A type 1 parallel universe assumes space is infinite it very well could be and the physical laws of these other universes are the same as ours, but are so far away from us that we are causally disconnected, meaning that no messages can be received or sent because we can only receive messages from within our own Hubble volume. A type 2 parallel universe is all dependent on the two theories, which, incidentally, may possibly prove this type of multiverse; the Inflation model and the Ekpyrotic Theory. According to Prof. Tegmark, because of ongoing inflationary processes in these universes and ours, space between the other universes and our own is expanding faster than the speed of light — ergo, they are too far for any communication to occur.

This type of parallel universe arises out of the Many Worlds Interpretation MWI of Quantum Mechanics to approach the phenomenon of wave-function collapse.

The MWI says that for every possible quantum option, there is another universe in which such an option is realised. This means there are infinitely many "parallel universes": cosmic patches exactly the same as ours containing someone exactly like you , as well as patches that differ by just one particle's position, patches that differ by two particles' positions, and so on down to patches that are totally different from ours.

Famously, physicist's Stephen Hawking's last paper before his death also dealt with the multiverse.

The Case for Parallel Universes

The paper was published in May , just a few months after Hawking's demise. About the theory, he told Cambridge University in an interview published in The Washington Post , "We are not down to a single, unique universe, but our findings imply a significant reduction of the multiverse to a much smaller range of possible universes.


  • Multiverse - Wikipedia.
  • The Legacy of the Key (Book One, Deluxe Edition) (Ancient Guardians 1).
  • Do parallel universes really exist? | HowStuffWorks!
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  • Parallel universe theories suggest their are infinite Earth's out there, just a bit different from ours. Not everyone agrees with the parallel universe theory, however. A article on Medium by astrophysicist Ethan Siegal agreed that space-time could go on forever in theory , but said that there are some limitations with that idea. The key problem is the universe is just under 14 billion years old.

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    So our universe's age itself is obviously not infinite, but a finite amount. This would simply put limit the number of possibilities for particles to rearrange themselves, and sadly make it less possible that your alternate self did get on that plane after all to see China.

    Planck's 'almost perfect' universe could point to new physics

    Also, the expansion at the beginning of the universe took place exponentially because there was so much "energy inherent to space itself," he said. But over time, that inflation obviously slowed — those particles of matter created at the Big Bang are not continuing to expand, he pointed out. Among his conclusions: that means that multiverses would have different rates of inflation and different times longer or shorter for inflation. This decreases the possibilities of universes similar to our own. But rather than seeing this lack of other universes as a limitation, Siegal instead takes the philosophy that it shows how important it is to celebrate being unique.

    He advises to make the choices that work for you, which "leave you with no regrets. Here are some of the more prominent uses of parallel universes in science fiction. This is by no means a complete list, but a sampling of some of the more-quoted examples.

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    Universe: Do Parallel Universes Really Exist? Universe: Do Parallel Universes Really Exist?
    Universe: Do Parallel Universes Really Exist? Universe: Do Parallel Universes Really Exist?
    Universe: Do Parallel Universes Really Exist? Universe: Do Parallel Universes Really Exist?
    Universe: Do Parallel Universes Really Exist? Universe: Do Parallel Universes Really Exist?
    Universe: Do Parallel Universes Really Exist? Universe: Do Parallel Universes Really Exist?
    Universe: Do Parallel Universes Really Exist? Universe: Do Parallel Universes Really Exist?
    Universe: Do Parallel Universes Really Exist? Universe: Do Parallel Universes Really Exist?

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