On-Topic: Anything that good hackers would find interesting. That includes more than hacking and startups. If you had to reduce it to a sentence, the answer might be: anything that gratifies one's intellectual curiosity. [0]
For example, having learned about mummia, I might incorporate it as an item or crafting ingredient in a game :) and a player might learn about this through that, which may inspire them on to something else.
Comments
They all say wikipedia.org next to them.
What's the point of random wiki pages on hacker news though?
[0] https://news.ycombinator.com/newsguidelines.html
To generate discussion from a modern point of view.
There is nothing new under the sun, and inspiration can come from anywhere.
For example, having learned about mummia, I might incorporate it as an item or crafting ingredient in a game :) and a player might learn about this through that, which may inspire them on to something else.