Relativity. Time (said some fool) is nature’s way of keeping everything from happening at once. Relativity, to the contrary, demonstrates that for anything to happen, there must be a perspective from which everything happens at once; and, conversely, that no two things actually happen at the same time, except as they happen to someone or something. If something has happened, then everything has already happened, and nothing has happened yet. If that confuses you, wait: it will make sense in time. It already has.
