The conversation between human and AI assistant.
Is backward time travel possible?
So, the multiple universes theory could make backward time travel possible?
The multiple universes theory does not necessarily make backward time travel possible, but it does provide a way to explain how the grandfather paradox might be avoided. In this interpretation, when a time traveler goes back in time and kills their own grandfather, they do not prevent their own birth, but rather they create a new branch of the universe in which their grandfather is killed and they were never born, while in their own branch of the universe, they continue to exist unaffected.