In no particular order, these things came to mind as things I’m interested in learning more about.
Gutenberg (of Gutenberg Press fame)
Trade Routes and their impact on world history
Weather Stations and weather tracking around the world
Family life around the world
Cartography, and the history of map making
So, I’m off to the library soon, I hope. This is one of those things that come to mind when someone asks, “but how will they learn everything they need to know?” There’s so much that all of us learned in school that we have forgotten. Tis far better to learn anything when the knowledge is contextual and desired.