Donald Trump's campaign spokesman defended Trump using "vermin" to describe his enemies, while historians compared his language to Hitler, Mousselini.
Donald Trump's campaign spokesman defended Trump using "vermin" to describe his enemies, while historians compared his language to Hitler, Mousselini.
Time travel can only create branching timelines by changing the past without creating a paradox. So the time travellers who killed Hitler may have succeeded, just not in this timeline (if this timeline is even one where time travel will be invented one day).
If time travel did exist, it seems unlikely that we would be in the 'prime universe' with no time travelers. That would be one out of 2^n timelines where n is the number of time travelers. Assuming each time travel splits all parallel timelines and not just the original.