[Samuel.]

Originally Posted by lostalex

If you went back in time it would be a different universe. so it's true that you would never be born in that timeline, but it wouldn't affect the timeline you came from at all. There are tons of different parallel universes and timelines.

This.

I don't believe there are already existing parallel timelines though, but I believe the first to travel backwards in time would effectively create one. But then, who knows if it's already happened and this is a parallel timeline?

I don't believe it's possible anyway.