Slippery Rock University's Martha Gault Art Gallery is hosting an exhibit titled "Tapping the Invisible" through March 10, featuring pastel drawings and photographs by the late Michael Changnon, a former SRU art professor and founding member of the University's Art Department. Changnon's artwork is in collections that include the Westmoreland Museum of Art, the Children's Hospital of Pittsburgh, the former Westinghouse Corporation and the Senator John Heinz History Center. The Gault Art Gallery, located in the first floor of the Maltby Center, is open 11 a.m. to 5 p.m., Mondays through Thursdays. Additional images provided by Alex Frazier, a sophomore art and photography major from Prospect.