Rangos Omnimax Theater at the Carnegie Science Center, North Side, has opened “Rocky Mountain Express” and also is showing “Tornado Alley,” and the children’s film “Animalopolis.” Tickets for most shows are $8 for adults and $6 for senior citizens and children. Omnimax is not recommended for children younger than 3. Call 412-237-3400 for show times. The science center will be closed Saturday and Sunday.