Time travel movies generally try to sidestep the fundamental paradox inherent in being able to go back in time: what if you change things and as a result aren’t born? You’ve seen the films where the family portrait slowly fades as one or more children are “unborn” (think Back to the Future), but still, most sci-fi films avoid the issue because it can undermine the sappy love story or whatever else is going on narratively. Go back and…Read More