What’s the difference between telepathy and telekinesis? Have the Rolling Stones ever played a show in Punxsutawney, Pennsylvania? What actually lives in underwater caves?
If you’re writing a story—any story—chances are that you’ll run into questions that need answers. And these answers are usually relevant, if not essential, to your storyline. When you hit an impasse like this it suddenly seems urgent that you stop writing and turn to research instead. The rational, logical part of your brain steps in and advises that you can’t possibly go on creating your story if you don’t have all the facts yet.