How big is Wikipedia? How many printed volumes would it take to put all of the online encyclopedia on a library’s shelves? I’m only asking about the 5 million or so articles in the English language version—there’s at least that many more in other languages.

Now we know, thanks to an artistic installation by New York artist Michael Mandiberg, first seen at the Elizabeth Denny Gallery on the Lower East Side last summer and now moved into the bright lights of a real library—the stacks of the Arizona State University Library in Tempe. (I’m the university librarian for ASU, and ASU is a partner with Slate and New America in Future Tense.)