Rangos Omnimax Theater at the Carnegie Science Center, One Allegheny Ave., North Side, is showing "Volcanoes of the Deep Sea," "Mysteries of the Great Lakes" and "Under the Sea," plus at limited times "The Polar Express." Admission cost varies. Omnimax is not recommended for children younger than 3. The center is closed because of the Steelers home game on Sunday. Tickets for most shows are $8 for adults and $6 for senior citizens and children. "Polar Express" tickets are $10 for adults and $8 for senior citizens and children. Call 412-237-3400 for show times.