On this episode of ST, we offer another Museum Confidential podcast. (The podcast, now in its second season, is co-created twice a month by our own Scott Gregory and Jeff Martin of Philbrook Museum.) This time out, MC learns about a special, much-discussed exhibition now on view at the Guggenheim Museum in New York. It's a remarkable series of works by the obscure yet visionary Swedish artist Hilma af Klint (1862-1944). The exhibit is titled "Paintings for the Future" and closes April 23rd.