Far out in the Atlantic Ocean, a cacophony of clicks announces return of titans. Mother and calf listen intently. Only she knows what these clicks mean. The males have arrived, stupendous, battle-scarred bulls. Back from epic wanderings, the oldest may be 70 years old and have traveled 60 times the circumference of the earth. Most of the time, utterly alone. Now gentle greetings take place. The whales seem to revel in displays of affection. Young males bounce sounds off each other, sizing up the competition in more ways than one. The curious calf joins in.