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1. • Cannot be possible

     • The simplest answer is that time travel cannot be possible because if it was, we would already be doing it. One can argue that it is forbidden by the laws of physics, like the second law of thermodynamics or relativity. There are also technical challenges: it might be possible but would involve vast amounts of energy.
     theconversation.com/can-we-time-travel-a-theoretical-physicist-provides-some-answers-182634

     Can we time travel? A theoretical physicist provides some answers

2. People also ask

   Is time travel possible in science fiction?

   • As often portrayed in science fiction, with a time machine, nothing is permanent anymore – you can always go back and change it. But is time travel really possible in our universe, or is it just science fiction? Our modern understanding of time and causality comes from general relativity.

   There's One Way Time Travel Could Be Possible, According to This

   www.sciencealert.com/there-s-one-way-time-travel-could-be-possible-according-to-this-physicist

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   Can time travel to the near future?

   • Time traveling to the near future is easy: you’re doing it right now at a rate of one second per second, and physicists say that rate can change. According to Einstein’s special theory of relativity, time’s flow depends on how fast you’re moving. The quicker you travel, the slower seconds pass.

   Is Time Travel Possible? - Scientific American

   www.scientificamerican.com/article/is-time-travel-possible/

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   Is time travel possible?

   • His hope was that his invitation would be read by someone living in the future, who had capabilities to travel back in time. But no one showed up. As he : “The best evidence we have that time travel is not possible, and never will be, is that we have not been invaded by hordes of tourists from the future.”

   Is time travel even possible? An astrophysicist explains the science

   theconversation.com/is-time-travel-even-possible-an-astrophysicist-explains-the-science-behind-the-science-fiction-213836

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   Can time travel and parallel timelines go hand-in-hand?

   • Time travel and parallel timelines almost always go hand-in-hand in science fiction, but now we have proof that they must go hand-in-hand in real science as well. General relativity and quantum mechanics tell us that time travel might be possible, but if it is, then multiple histories must also be possible.

   There's One Way Time Travel Could Be Possible, According to This

   www.sciencealert.com/there-s-one-way-time-travel-could-be-possible-according-to-this-physicist

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   Can physicists find out if time travel is possible?

   • This theory has existed for more than 100 years, and has been experimentally verified to extremely high precision, so physicists are fairly certain it provides an accurate description of the causal structure of our Universe. For decades, physicists have been trying to use general relativity to figure out if time travel is possible.

   There's One Way Time Travel Could Be Possible, According to This

   www.sciencealert.com/there-s-one-way-time-travel-could-be-possible-according-to-this-physicist

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   Can time travel be resolved?

   • One attempt at resolving time travel paradoxes is theoretical physicist Igor Dmitriyevich Novikov's self-consistency conjecture, which essentially states that you can travel to the past, but you cannot change it. According to Novikov, if I tried to destroy my time machine five minutes in the past, I would find that it is impossible to do so.

   There's One Way Time Travel Could Be Possible, According to This

   www.sciencealert.com/there-s-one-way-time-travel-could-be-possible-according-to-this-physicist

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3. spaceplace.nasa.gov › time-travel › enIs Time Travel Possible? | NASA Space Place – NASA Science ...

   spaceplace.nasa.gov › time-travel › en

   • Cached

   Oct 11, 2024 · Yes, time travel is indeed a real thing. But it's not quite what you've probably seen in the movies. Under certain conditions, it is possible to experience time passing at a different rate than 1 second per second. And there are important reasons why we need to understand this real-world form of time travel.

4. www.bbc.com › future › articleIs time travel really possible? Here’s what physics says - BBC

   www.bbc.com › future › article

   The ability to jump forward and backwards in time has long fascinated science fiction writers and physicists alike. So is it really possible to travel into the past and the future?

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6. www.sciencealert.com › there-s-one-way-time-travelThere's One Way Time Travel Could Be Possible, According to ...

   www.sciencealert.com › there-s-one-way-time-travel

   • Cached

   Apr 26, 2022 · As often portrayed in science fiction, with a time machine, nothing is permanent anymore – you can always go back and change it. But is time travel really possible in our universe, or is it just science fiction? Our modern understanding of time and causality comes from general relativity.

7. Videos

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     Is Time Travel Possible? - The Science of Time With Neil deGrasse Tyson

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     How To Time Travel, According To A Physicist

     2 Dec 2017

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     Is time travel possible? - Colin Stuart

     21 Oct 2013

     3.9M views

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8. theconversation.com › is-time-travel-even-possibleIs time travel even possible? An astrophysicist explains the ...

   theconversation.com › is-time-travel-even-possible

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   Nov 13, 2023 · Scientists are trying to figure out if time travel is even theoretically possible. If it is, it looks like it would take a whole lot more knowledge and resources than humans have now to...

9. www.scientificamerican.com › article › is-timeIs Time Travel Possible? | Scientific American

   www.scientificamerican.com › article › is-time

   • Cached

   Apr 26, 2023 · Time traveling to the near future is easy: you’re doing it right now at a rate of one second per second, and physicists say that rate can change. According to Einstein’s special theory of ...

10. www.usatoday.com › story › techWill time travel ever be possible? Science behind curving ...

    www.usatoday.com › story › tech

    • Cached

    Sep 10, 2022 · According to NASA, time travel is possible, just not in the way you might expect. Albert Einstein’s theory of relativity says time and motion are relative to each other, and nothing can go...

11. theconversation.com › time-travel-could-beTime travel could be possible, but only with parallel timelines

    theconversation.com › time-travel-could-be

    • Cached

    Apr 24, 2022 · Scientifically speaking, for time travel to exist, so must parallel timelines. This theory addresses the paradoxes that arise when studying the possibility of time travel.