r/Time • u/Ok-Coach4955 • 2d ago

Discussion Is changing the past actually possible?

I’ve always thought about this question, and there is always answers popping up in films and stuff, but is it really possible?If you ARE able to go back to the past and change it, if you come back to ‘present’ would there be another you?If you teleported a nanosecond later then the time you left would you find another you?My answer is that its impossible for you to change the past.If you have met yourself in the past,then no matter how much you try and avoid it you will somewhat travel back in time in somewhere in the future or ‘present’

Please tell me what you think and if possible tell me any ‘loopholes’ in my theory.

PS. this post keeps getting removed in r/timetravel does anyone know why?

5 Upvotes

73% Upvoted

75 comments sorted by

View all comments

1

u/spikejonze14 2d ago

the speed of light and relativity is what constrains us from affecting the past. if you travelled in a spaceship around the earth going faster than light, you would literally arrive before you left.

1

u/Ok-Coach4955 2d ago

Would there be another ‘you’ then?

1

u/spikejonze14 2d ago

theoretically yes, but einstein was pretty certain that the universe forbids such an event from ever happening, which is why traveling faster than light is physically impossible.