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Multiple timelines is not a reality yet (as of 2016's science and technology), but exists only in Marvel/DC universe. It is something that is used to explain the paradox of time-travel. If you go back in time and kill yourself, the paradox is that you can't do that since you have just wiped off the physical existence of your future self by doing that.

So, multiple timeline theory explains that there will be two continuous parallel realities - one in which you will stay alive, and another in which you will be dead. Time, essentially splits/branches like a river from the point in time where such an event occurred (Watch X-Men - Back to the Future if you need to understand this in detail).

I want to know what is the physics scientist's opinion in this regard? I've heard somewhere (Stephen Hawkings perhaps) that there is some evidence of multiple parallel universes. Can this explain the multiple timeline theory?

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closed as primarily opinion-based by ACuriousMind, Kyle Kanos, Gert, HDE 226868, CuriousOne Jan 2 '16 at 20:13

Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on opinions, rather than facts, references, or specific expertise. If this question can be reworded to fit the rules in the help center, please edit the question.

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    $\begingroup$ @AccidentalFourierTransform Well, one century's magic is another century's science. The scientists of Copernicus' time were equally smug when he said that Sun is at the center of the universe! If today's scientists laugh at this question, its no different. $\endgroup$ – Prahlad Yeri Jan 2 '16 at 14:50
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    $\begingroup$ ...exists only in Marvel/DC universe er, not quite. There are plenty of books and movies involving multiverses, it is not exclusive to two comic book publishers. $\endgroup$ – Kyle Kanos Jan 2 '16 at 14:50
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    $\begingroup$ Also: this is basically the same question as this one which is closed as asking about opinions of some people and not physics. You might be interested in this question, among many other questions about multiverse. $\endgroup$ – Kyle Kanos Jan 2 '16 at 14:54
  • $\begingroup$ @KyleKanos As I said, the Copernicus of today will not try to close this, only the closed minded Scientists who are smug enough to even accept a theoretical possibility outside of their calculations. Imagine, a question like Can sun really be at center of our galaxy? being laughed at and ridiculed by contemporaries of Copernicus! $\endgroup$ – Prahlad Yeri Jan 2 '16 at 14:57
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    $\begingroup$ Closing questions that are explicitly off topic is in the interests of this site. Asking questions about multiverse theory can be in the interest of physics (the study) and this site, if it is constrained to being on-topic. $\endgroup$ – Kyle Kanos Jan 2 '16 at 15:14
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The book you need to read is Fabric of Reality by David Deutsche

He is probably the current best known proponent of the Many Worlds Interpretation of Quantum Mechanics. There, you have a potentially infinite number of "parallel time lines"

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    $\begingroup$ And an infinite number of Dirk Brueres tippy-tapping on their keyboards! $\endgroup$ – John Duffield Jan 2 '16 at 18:13
  • $\begingroup$ Yes - which is why I view the lottery as a transdimensional money transfer mechanism. While in this universe someone almost always wins who is not me, and therefore I transfer my money to them, in the wider scheme a version of me always wins elsewhere. $\endgroup$ – user56903 Jan 2 '16 at 18:21
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    $\begingroup$ MWI is intellectual nonsense, it doesn't even qualify for science. Worse, still, it completely misses the measurement problem which it claims to solve. $\endgroup$ – CuriousOne Jan 2 '16 at 20:13
  • $\begingroup$ There are at least 5 other multiverse theories apart from that. $\endgroup$ – user56903 Jan 2 '16 at 21:34
  • $\begingroup$ @Dirk Bruere : and they're all nonsense too! $\endgroup$ – John Duffield Jan 4 '16 at 13:40
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Can multiple timelines exist according to theoretical physics?

No. It's science fiction I'm afraid.

Multiple timelines is not a reality yet (as of 2016's science and technology), but exists only in Marvel/DC universe. It is something that is used to explain the paradox of time-travel. If you go back in time and kill yourself, the paradox is that you can't do that since you have just wiped off the physical existence of your future self by doing that.

And time travel is science fiction too. There is no way that you can move such that everything else not only moved back to where it was, but never moved at all. See this answer for more information.

So, multiple timeline theory explains that there will be two continuous parallel realities - one in which you will stay alive, and another in which you will be dead. Time, essentially splits/branches like a river from the point in time where such an event occurred (Watch X-Men - Back to the Future if you need to understand this in detail).

This sort of stuff makes for a nice movie. There's lots of really good movies that feature time travel. I mentioned some of them in this article. But they're just movies, not physics.

I want to know what is the physics scientist's opinion in this regard? I've heard somewhere (Stephen Hawkings perhaps) that there is some evidence of multiple parallel universes. Can this explain the multiple timeline theory?

There is no evidence of parallel universes, sorry. And no, it can't explain "multiple timeline theory".

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