Close your eyes and try hard to imagine what nothingness would look like. Drawing a blank? Go visit Hamline University and find the Heech Sculpture. It’s a sculpture of nothing. Or at least it means nothingness. It’s been there for over forty years, but it’s still a bit of a mystery. KFAI’S Peggah Navab has a story about what one of Iran’s foremost contemporary artists left behind in St. Paul.