Dr. Robert Ballard is an American oceanographer and explorer best known for his discovery of the wreck of the Titanic in 1985. He has dedicated his career to underwater exploration and has led numerous expeditions to study shipwrecks and marine ecosystems. His work has significantly advanced the field of oceanography. In addition to his discoveries, Dr. Ballard is a professor at the University of Rhode Island and has founded the Ocean Exploration Trust, which promotes ocean research and education. He has also been involved in various documentaries and educational programs to raise awareness about the importance of ocean conservation.