You've gotten your hands on a shiny new time machine, and you decide that your first order of business is to travel back in time and kill Hitler. But killing Hitler and preventing the Holocaust isn't quite as simple as it sounds. Here's why.
Alternate history occurs when somebody makes a slightly different decision or a key event just gets lost in the shuffle. But sometimes history changes when time-travelers drop by! Here's what AH literature teaches us to do (should we ever time-travel).