How did Cantor come up with his diagonal proof? It seems to have been dreamed out of nowhere
Why are there advertisements for a shampoo containing caffeine? Does caffeine do something useful other than when you drink it?
What happens in sense and sensibility?
All of them give a decent answer, with the ability to ask follow ups. Eg, how does S&S compare with Pride and Prejudice? What about more recent novels connecting romantic choices with economic choices?
All of them give you links to source material, in case you suspect they are just making it up.
At the start of the millennium, Google search changed everything about how I look for information. Now it seems outdated.