This is simultaneously the most depressing and most realistic take on the subject I’ve ever read. I’ve always considered time travel to the past to be impossible because the past already happened and is gone, there is nothing to go “back” to. Time is an arrow that only points to the future and is forever in motion, never leaving a trail behind.

With that said, I can still enjoy time-travel fiction for what it is, a fantasy, and suspend my disbelief enough to enjoy it.