They've done it, tho I think it was only the body & blood that was transformed for one particular priest. The result was blood type AB.
::Whew!:: It's a good thing science confirmed the real presence, our you'd have had to reject that doctrine just as you've rejected the literal truth of the Creation story! Why not have science verify each and every article of faith before you've decided to accept it?
I don't suppose anyone made any snide remarks about "transubstantiation science" and said it wasn't "real science" at all, did they?