In the tiny submarine alvin ballard has made pioneering descents that have opened new doorways into oceanic exploration his discovery of the titanic was perhaps his most dramatic find today he faces the greatest challenge of his career exploring new ways for humans to exist in harmony with the . Get this from a library deep sea explorer the story of robert ballard discoverer of the titanic rick archbold in the tiny submarine alvin dr robert ballard has explored underwater mountain ranges rare giant clams and twelve foot tube worms and the doomed ocean liner the titanic
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