Among the most accomplished and well known of the world's deep-sea explorers, Dr. Robert Ballard is best known for his historic discoveries of hydrothermal vents, the sunken R.M.S. Titanic, the German battleship Bismarck, and numerous other contemporary and ancient shipwrecks around the world. During his long career he has conducted more than 150 deep-sea expeditions using the latest in exploration technology. He is the Director of the Center for Ocean Exploration at the University of Rhode Island Graduate School of Oceanography and the President of the Ocean Exploration Trust.