Gallery Talk. Object/Subjective. Noon-1 p.m., Smart Museum of Art, 5550 S. Greenwood Ave., 773-702-0200, free. Artist Zachary Cahill and Hanna Feldman, of Northwestern University, present in conjunction with Cahill’s current work on display, “USSA 2012: Wellness Center: Idyllic.” Space is limited. Lunch is provided. Register in advance at smartmuseum.uchicago.edu/calendar/register.