It depends on the type of time travel rules. One theory suggest going back in time creates a branch in the time-space continuum, one where the time travel happened, one where it did not.
With this branching time-space rule, there’s one timeline, where no time travellers appeared, and one where they did.
It depends on the type of time travel rules. One theory suggest going back in time creates a branch in the time-space continuum, one where the time travel happened, one where it did not.
With this branching time-space rule, there’s one timeline, where no time travellers appeared, and one where they did.