One of SeaWorld Orlando's largest expansions opens Friday at the theme park."Antarctica: Empire of the Penguin" showcases more than 200 penguins with a major new ride, and, of course, shops and themed restaurants."This is the closest you'll get to it [Antarctica]," said famed zookeeper and animal expert Jack Hanna, whose career got its start at the Central Florida Zoo in Sanford in 1972. "It's one of the most pristine places in the world. ... Last night, the moon was shining out on the ice here. It was absolutely spectacular. That's the feeling people will get here," he said.