Get Siri Knowledge
Recent versions of iOS and macOS have tied Spotlight directly into the Siri knowledge engine, so the same information you can have Siri offer up by using your voice can be pulled up via Spotlight as well.
This lets you search for a wide variety of general knowledge information, such as cities, actors, authors, singers, major historical events, food, and much more. The results usually come from Wikipedia, but the Siri knowledge system provides a cleaner summary of those results in a bite-sized form for when you don’t want to wade through a whole Wikipedia article.