changing past events?

Question

if you could go back in time to change a part of your past (in a dramatic way, ie: moved country, avoided a fatal injury, saved a loved one from dying, etc), is that possible? ive partly believed that if you could do that (say for arguments sake that you saved your brother from getting into a car that had a crash), then the act would be done in the current time and there would be nothing to change in the past.

Answer 1

exactly, you cannot change past of events.because the past events would already exist and what you say you wanted to do would already have happened.but the only way time travel could exist would be through first person in which they would create an alternate universe that existed only to them.which kinda makes you crazy if this was to happen but you would never know this because everything seems normal to you in the universe in which created.to explain in the main universe the one we are in right your brother would be dead but in the one you created you would go back and save him and everything would be alright, but also in our universe youd probably live in a mental ward or maybe live your life out normally but not actually there its hard to explain that part but thats why its called first person cause only you would know whats going on.

Answer 2

It is the old Grandfather paradox.

If you go back and change an event in such a way that it alters all of the events after i.e. you kill your grandfather, the events following will change the past and you will no longer travel back in time i.e. your father wouldn't be born and you wouldn't be born.

This creates a prardox, if you changed something then the result of that change means that you wouldn't have or couldn't have travled into the past to change it in the first place, who changed it.

There are two possible solutions,
1. Quantum Physics tells us that all possiblities that can happen must ahppen in alterante unverses. Your actions would create a different universe (one that has split off from your 'own universe'). The old universe would continue on without you and your new universe would be the way that you 'want' it to be.

2. Don't travel back in time. This would probaly be that case for most time travel if we ever invent the technology. Restriction on places and times would be placed on the technology i.e. you could not travel to a point within your own life time or to a place where your family has been within 500 years.

Hope this helps.

Answer 3

I'm a believer in the past makes us who we are and without that horrible event I wouldn't be as strong of a person. I would never travel back in the past to change anything even the most painful parts of my life

Answer 4

What do you think we're doing here!0!

We are back in time to make that change, that's what this life is about, time-travel. We come from the Present to the Past(here/now) to make a change, to make a difference.

When we die, what really happens is that we go back to the Present, so that we can travel to the Past again. We've been time traveling for ages from Present - Past - Present - Past -

So, now we're traveling from Past to Present!0!

Enjoy!

Answer 5

im a firm believer in that if we do discover time travel, and go back to prevent a fatal happening, that the fatality will still take place just maybe in a different way, or at a different time. time has nothing to do with the way that ones life is laid out, if you are supposed to die, you are definately going to. time travel will only allow you to go back and visit with the one you miss, but not to permanantely have them back. thats if time travel is ever discovered, which i also highly doubt without consequences to severe to risk it.

Answer 6

i might desire to substitute my previous, with some small themes like truthfully putting forward what i truthfully felt. it may of replaced alot for my siblings :P additionally changing the previous might desire to substitute the destiny

Answer 7

You couldn't change anything. Entropy forbids it.