ATLANTA — Plunge into the mysterious world of whales and meet a culture that has lived intertwined with the majestic creatures throughout history in Fernbank Museum’s newest special exhibition, “Whales: Giants of the Deep,” on view Feb. 15 through Aug. 24. For centuries, whales have captured imaginations and ignited emotions. People have revered them, made them the subject of myth, hunted them to the brink of extinction and passionately protected them.