Pertaining to time travel, if you go to the past of a place that neither you nor any human has ever been to before, then could any Grandfather Paradox occur? Let us say that it is an alien planet filled with aliens. DE
Yes. The aliens are so perturbed by your sudden arrival that they seek out Earth and destroy it... before you would have otherwise been born. So no human other than you has ever visited the place you're in, but there are now no humans yet you have still to be born. Yet you exist. Grandfather paradox 101.
This would only be possible if the planet was hollow. If you went back in time and married your grandmother you could be your grandfather.
If no human had ever been there before and you went there, then today that place wouldn't exist because you were there in the past, so you couldn't go there.
"That's what you'd do with a time machine? Go back and miss traffic?" The Goldbergs. Forget that, what about the future?? Would predicting the future negate time?? Time:---> Me:------> I WILL die, that is my prediction! As for your question, you have ALREADY existed, and therefore so has your grandfather, so you could not, and would not, kill him.