The physics of time travel
Ways to improve memory
Every time I start a new fictional story, I’m amazed at the real things I learn along the way. Even though several of my manuscripts will never see the light of day, I learned something while writing them. Who knows, maybe parts of those bottom-of-the-drawer stories will turn up someplace else. Writing is never wasted if it helps me learn something along the way.
And maybe all that stuff about transhumanism will come in handy someday. You never know.