The mysteries of black holes, including what it would be like to fall into one, will be explored during two June shows at the University of Colorado at Boulder's Fiske Planetarium. CU-Boulder Professor Andrew Hamilton will present "Black Holes," a show intended for a general audience, on June 16 at 8 p.m. On June 17 at 9:30 a.m., he will present the CU Wizards show "Black Holes," which is geared toward students in grades five through nine. Both shows will be in the planetarium.