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    Changing Seas
            Mystery of the Humpback Whale Song
                
                    
                        
                            Season 11
                        
                    
                    
                        
                            Episode 1104
                        
                    
                
            
            
            Each winter, a population of humpback whales migrates to its breeding grounds in the Hawaiian Islands. It is here that male humpbacks perform their elaborate and haunting song. Experts are studying the purpose of this song and what it might tell them about the animals’ overall fitness.
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