Most of the time one or the other feels better, but every so often, "which" vs. "what" trips me up. So, what's the exact difference and when should you use one or the other?
Much of (what/which) scientists know about dinosaurs has been recently discovered. The phenomenon of (what/which) are known as corporate networks has also attracted attention. And yes, the ...
Temporary reopen note: Pleas note that this other question here does not address what or compare it to which or that: When to use “that” and when to use “which”? Original Question Which ...