Hollywood Grins And Bears It: Tank the Bear may look mean, but it's just an act - 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.
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.
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