<p>Multiple and parallel universes are a feature of a number of "theories", including most famously (and probably before string theory), the <a href="https://en.wikipedia.org/wiki/Many-worlds_interpretation" rel="nofollow">many worlds interpretation</a> of quantum mechanics.</p>

<p>The attraction of the many worlds or multiverse ideas is that they offer a ready explanation of why we appear to live in a uiverse that has been "fined tuned" for our existence.</p>

<p>The disadvantage of the "theory" is that there does not appear to be any readily available means to falsify it. For that reason many scientists view it as unscientific.</p>

CC BY-SA 3.0
2016-02-09T09:34:51.107Z
2016-02-09T09:34:51.107Z
ProfRob
<p>As much as parallel universes go, there's a theory for this known as the Multiverse theory, part of the String theory.</p>
<blockquote>
<p>In String theory, the Multiverse is a theory in which our universe is
not the only one; many universes exist parallel to each other. These
distinct universes within the multiverse theory are called parallel
universes.</p>
</blockquote>
<p>There are cosmic inflation models that support this as said <a href="https://en.wikipedia.org/wiki/Eternal_inflation#Inflation_and_the_multiverse" rel="nofollow noreferrer">here in Wikipedia</a>. A quote from there:</p>
<blockquote>
<p>It's hard to build models of inflation that don't lead to a
multiverse. It's not impossible, so I think there's still certainly
research that needs to be done. But most models of inflation do lead
to a multiverse, and evidence for inflation will be pushing us in the
direction of taking [the idea of a] multiverse seriously. Alan Guth[7]</p>
</blockquote>
<p>Now to address your point if we can ever know if a parallel universe exists exists.</p>
<p><strong>Opinion</strong>: Possible but unlikely. I don't think that we are close to achieving this.</p>

CC BY-SA 3.0
2016-02-09T05:11:11.713Z
2016-02-09T05:11:11.713Z
2020-06-17T09:47:40.653Z
CipherBot
<p>Does  parallel universe really exists or just science fiction which ain't possible? Can we ever know?</p>

CC BY-SA 3.0
2016-02-09T04:22:10.970Z
Those 2 questions are unrelated to each other please post it as a different question.
CipherBot
<cosmology><universe><space><multiverse>
Is parallel universe possible
user10726
# Is parallel universe possible

(Asked by: username_0 on 2016-02-09)

Does parallel universe really exists or just science fiction which ain't possible? Can we ever know?

**Tags:** cosmology, universe, space, multiverse

> **Comments:**
> **username_1**: Those 2 questions are unrelated to each other please post it as a different question.  

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## 2 answers

### Answer by username_2 on 2016-02-09. Score: 2 | Accepted answer

Multiple and parallel universes are a feature of a number of "theories", including most famously (and probably before string theory), the [many worlds interpretation](https://en.wikipedia.org/wiki/Many-worlds_interpretation) of quantum mechanics.

The attraction of the many worlds or multiverse ideas is that they offer a ready explanation of why we appear to live in a uiverse that has been "fined tuned" for our existence.

The disadvantage of the "theory" is that there does not appear to be any readily available means to falsify it. For that reason many scientists view it as unscientific.


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### Answer by username_1 on 2016-02-09. Score: 0

As much as parallel universes go, there's a theory for this known as the Multiverse theory, part of the String theory.

> In String theory, the Multiverse is a theory in which our universe is
> not the only one; many universes exist parallel to each other. These
> distinct universes within the multiverse theory are called parallel
> universes.

There are cosmic inflation models that support this as said [here in Wikipedia](https://en.wikipedia.org/wiki/Eternal_inflation#Inflation_and_the_multiverse). A quote from there:

> It's hard to build models of inflation that don't lead to a
> multiverse. It's not impossible, so I think there's still certainly
> research that needs to be done. But most models of inflation do lead
> to a multiverse, and evidence for inflation will be pushing us in the
> direction of taking [the idea of a] multiverse seriously. Alan Guth[7]

Now to address your point if we can ever know if a parallel universe exists exists.

**Opinion**: Possible but unlikely. I don't think that we are close to achieving this.


---

