We have forever been fascinated with wild animals. 48 Hours examines this powerful allure, reporting on several animals whose skills and abilities will surprise you. Hollywood Grins And Bears It: Tank the Bear may look mean, but it's just an act -... (more) a good act. Performing in Hollywood films, he earns $5,000 a day. Correspondent Harold Dow profiles an unusual star. Swimming With Trouble: Dolphins have a reputation as gentle, friendly creatures. But new research indicates that they may also be stone-cold killers. Troy Roberts reports. AIBO, The Digital Wonder Dog: Peter Van Sant takes a cutting-edge robot dog on a walk in New York's Central Park. How does AIBO stack up against his flesh-and-blood relatives? Secret Language Of Elephants: Susan Spencer interviews a biologist who is trying to decode elephant communication that's barely audible to human ears. Dealing With Dog Anxiety: What do modern pet owners do with a disturbed Dalmation or a jumpy German shepherd? These days, they're calling in the pet psychologist. Richard Schlesinger reports. Learning Is For The Birds: When it comes to intelligence, birds get a bad rap. As Bill Lagattuta discovers, they'r actually very bright. "Birdbrain" takes on a whole new meaning.