If you went back in time and killes your grandpa how would you exist if you killed your grandpa?

Answere is, you wouldnt because Time travel is impossible.

The faster you move time slows down around you. Even light is bound by time(and it travels hella fast!).
You would have to go much faster than light to slow down enough to travel through time at a negative rate (or going back in time)
Now because it is impossible for unit with mass to travel at the speed of light there is no way to send matter back in time because when you think about it there is nowhere to send it to.

Now, the slower you move the time speeds up around you. Each electron in your body is constantly moving so its impossible for you to stop moving and speed up time around you to travel into the future.

Now, if all the electrons, protons, and nuetrons in your body were to stop moving. You would be a black hole. Now black holes compress matter into what it originally is (nothing) so to go travel into the future you would basically travel into the end of the universe (and thats no fun)...

Anyway, i just had to type what ive been thinking about.

Post comments if u feel like it. Cya