Think of a museum. Any museum. Which works of art get to be displayed, and which don’t, and why? Where do they keep all the unshown (or unshowable) pieces? And why do they keep them at all? And just how does one pack/ship/transport a priceless painting or sculpture? “Museum Confidential” is a new and unprecedented exhibition from Philbrook Museum of Art exploring such questions. “Museum Confidential: The Podcast” is a collaboration (to be posted twice monthly) between Jeff Martin of Philbrook and Scott Gregory of Public Radio Tulsa — and it covers the same fertile ground as the exhibit itself…as in, what really goes on “behind the scenes” at a museum?