David Baltimore is an American biologist known for his significant contributions to the field of molecular biology. He was awarded the Nobel Prize in Physiology or Medicine in 1975 for his work on the interactions between viruses and the genetic material of the cell. His research has greatly advanced our understanding of how genes function and how they can be manipulated. In addition to his research, Baltimore has held prominent academic positions, including serving as the president of the California Institute of Technology and the Johns Hopkins University. He is also involved in various scientific organizations and initiatives, promoting research and education in the life sciences.