Can we travel back to past?

Time travel to the past is theoretically possible in certain general relativity spacetime geometries that permit traveling faster than the speed of light, such as cosmic strings, traversable wormholes, and Alcubierre drives.

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Can you travel back in time to the past?

The fact that the universe is still around is ample evidence that time travel to the past is impossible.

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How do you travel back in the past?

  1. Time travel via speed. This is the easiest and most practical way to time travel into the far future – go really fast. ...
  2. Time travel via gravity. The next method of time travel is also inspired by Einstein. ...
  3. Time travel via suspended animation. ...
  4. Time travel via wormholes. ...
  5. Time travel using light.

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Is it possible to change the past with time travel?

The idea is that backwards time travel is impossible because if it occurred, time travellers would attempt to do things such as kill their younger selves (or their grandfathers etc.). We know that doing these things—indeed, changing the past in any way—is impossible.

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How fast do you have to go to time travel back to the future?

In the Back to the Future franchise, the DeLorean time machine is a time travel device made by retrofitting a DMC DeLorean vehicle with a flux capacitor, which allows for time travel when it hits 88 miles per hour.

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Neil deGrasse Tyson - Can We Go Back in Time Using a SpaceTime Machine?

23 related questions found

Can we go to past or future?

While it's not possible (yet) to travel to the future fast than the rate at which we're doing it now, it is possible to speed up the passage of time. But, it only happens in small increments of time. And, it has only happened (so far) to very few people who have traveled off Earth's surface.

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Could time travel ever be possible?

And, as physicist Stephen Hawking pointed out in his book "Black Holes and Baby Universes" (Bantam, 1994), "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." Science does support some amount of time-bending, though.

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Why can't we go back to the past?

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.

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What happens if you alter the past?

Most physicists agree that you cannot change the present by going back to the past. The Novikov self-consistency principle is a formal statement of this assertion. If we are able to go back to the past, and make changes, the universe will simply rearrange events so that the present stays the same.

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What's the formula for time travel?

In fact, according to Albert Einstein's famous equation, E = mc² , time travel is possible, at least in one direction.

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Is it normal to want to go back in time?

People go through a series of difficult experiences in life that might force them to contemplate their past. During these periods of reflection or regret, they'll sometimes wish they could turn back time, either to return to “the good old days” or to undo the mistakes they've made.

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Why do people travel in the past?

People in the past used to travel in search of livelihood, to escape from natural disasters, or to conquer other land of others.

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What would happen if I went back in time and met myself?

One idea from the 'multiverse' hypothosis is that if you did go back in time & met yourself, time (& hence reality) would 'branch off' and develop in a way that is different from the way it developed in your memories.

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Where would you go if you could time travel?

10 Key Destinations For The Historical Time Traveler
  • Rome, Height of the Empire. No one in living memory has ever really seen the Colosseum. ...
  • Kyoto, 16th Century. ...
  • United States, The Old West. ...
  • Ancient Egypt, c. ...
  • London, 14th Century. ...
  • Chang'an, Han Dynasty. ...
  • Chichen Itza, 5th century. ...
  • India, c.

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Is it Theoretically possible to travel Faster Than light?

In special relativity, the speed of light is the ultimate speed limit to the universe. Nothing can travel faster than it.

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How do I stop wanting to change the past?

That's why it's important that you let it go and leave the past behind with these eight tactics.
  1. Learn from the past but don't dwell there. ...
  2. Express yourself. ...
  3. Stop pointing fingers. ...
  4. Focus on the present. ...
  5. Disconnect for a while. ...
  6. Think about the people around you. ...
  7. Forgive those who wronged you -- including yourself.

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How do you rewrite the past?

How To Rewrite Your Past
  1. Identify what story you're telling yourself exactly. Do you tell the story of your past as it happening for you or from a victim mentality? ...
  2. Rewrite the story of your childhood with an abundance mindset. ...
  3. Identify your thoughts about these moments from your past. ...
  4. Rewrite your recent past.

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How do you rewrite your future?

Here are a few simple steps to follow in order to rewrite your future:
  1. Self-awareness is the original sexy. Practicing self-awareness is one of the greatest skills in life, as it allows you to know yourself in a way that no one else can. ...
  2. Acceptance is essential. ...
  3. Embrace the change. ...
  4. Attitude of gratitude.

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Can we ever forget the past?

It may not always be possible to forget unwanted memories, but people can use strategies to help them cope with traumatic events. This can include memory suppression techniques, identifying triggers, and contacting a mental health specialist.

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Why do we leave the past in the past?

Over the years, you develop, change, grow, and learn so many new things. Your interests change, as do your hobbies, relationships, and experiences. If you stay stuck in the past, you will never truly be able to embrace who you are in the present day, and you will never be able to grow to your fullest potential.

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Do wormholes exist?

While researchers have never found a wormhole in our universe, scientists often see wormholes described in the solutions to important physics equations. Most prominently, the solutions to the equations behind Einstein's theory of space-time and general relativity include wormholes.

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Is space infinite?

Because space isn't curved they will never meet or drift away from each other. A flat universe could be infinite: imagine a 2D piece of paper that stretches out forever. But it could also be finite: imagine taking a piece of paper, making a cylinder and joining the ends to make a torus (doughnut) shape.

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Is it possible to make a time machine?

Time travel is still impossible because all these theories can't be tested practically. Scientists are trying to make a time machine, but it all seems possible in science-fictional movies. You will find several people claiming to time travel, like Alexander Smith. But no one has concrete proof to support their claim.

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Does the past continue to exist?

In short, space-time would contain the entire history of reality, with each past, present or future event occupying a clearly determined place in it, from the very beginning and for ever. The past would therefore still exist, just as the future already exists, but somewhere other than where we are now present.

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