Parts of this article speaks of scientific evidence such as the law of indestructibility…This article has to do with the Real Presence.although I do not think it is exactly what you are looking to find.
If you recall where you heard the audio you may be able to find it again. EWTN website has an audio as well as video library of programs. Also many of the regular programs with their own websites may also have program copies available for you.
I am just making this little observation. Some things look different yet have the same chemical makeup such as ice and water (H2O) or diamonds © look very different than pure carbon in other forms…If appearances can be different while substance is the same, why can’t the reverse also be possible? If God can make the world from nothing, why could He not do something so simple by comparison as to change the substance of something while the outward appearance remains? It is reasonable to believe in the Transubstantiation even without “scientific proof.” Is it reasonable to limit the ability of God to only what can be proved?