This one comes from BatesTip, an info newsletter that I receive.
The tool is called Powerset and specifically searches Wikipedia. It’s especially strong in pulling together information that spans a number of Wikipedia articles.
I used it to search for “ancient Egypt” and got the main wiki article plus a large number of articles that could have taken me along several lines of inquiry.
Granted, Wikipedia is not a reliable source for newspaper articles on its own, but I’ve found it to be invaluable in pointing me towards information that is reliable.