One of those days working for lots of different clients, and hence reading lots of different interesting things. I now know a bit more about astrobiology and financial trading than I did this morning.
Hardly any of the papers I edit for my clients (who are almost all academics) are on topics that I would ever have thought to look into for myself. Nevertheless, I almost always find them interesting, and have added significantly to my stock of useless knowledge through my editing work.
I just need to find a pub quiz that regularly has rounds on sociological theory and statistical equations, so I can put it to good use!