OVER THESE PAST few weeks, I have come to understand that there is no substance to time. None. One minute I am thirty-four years old, doing all the things that people of my age do, all the things we can get away with, and the next I’m fourteen again, huddled beneath the sheets and wishing that the whole world was nothing more than a fetid dream. To the vast majority of us, time travel seems ridiculous until we actually experience its turmoil