Can we travel to the past. Is time travel to the past possible?
I have a theory on it. The theory is let that I created a time machine which can travel to the past. Then I travelled to my past and killed my grandfather, as a result my father was not born nor I ,so the time machine was also not made.
Now if time machine was not made then how I went to my past and killed my grandfather .
And if he wasn't killed I was born and made the time machine and killed him.
This cycle continues and has no end.
Another example if in future anybody makes a time machine which can travel to the past then surely we would have seen a man from future as he would have travelled back to his past that is us
So I conclude that time travel to future is possible but not to past.
Please discuss and help me in developing this theory to a better one.
Grandfather paradox creates an alternate timeline where you never existed . The main timeline remains intact . But the 2nd law of Thermodynamics prevents any form of time travel to the past .
You can go to the future by using time dilation and by staying in a moving spaceship , no law prevents this from happening . But as of now , we can't achieve speeds even close to the speed of light . Hence , time travel is impossible.