I’ve long been intrigued by the supposed liquefaction of the blood of St. Januarius in Naples. Part of the purpose of this article was to debunk the common notion of a clash between religion and science; since the “miracle” (as the Vatican is eager to stress) has nothing to do with Catholic doctrine, and the proposed explanations are not testable.
The article appeared in the July 2006 issue of Fate. But you can read it, since someone has posted the whole thing over here…