Rangos Omnimax Theater at the Carnegie Science Center, One Allegheny Ave., North Side, is showing "Grand Canyon Adventure: River at Risk," "Mummies: Secrets of the Pharaohs" and "Wild Ocean." Admission cost varies. Omnimax is not recommended for children younger than 3. Call 412-237-3400 for show times. The Science Center will be closed on Sunday due to the Steelers playoff game at Heinz Field.