Jacques Piccard was a Swiss oceanographer and engineer, born on July 28, 1922. He is best known for his pioneering work in deep-sea exploration, particularly for co-inventing the bathyscaphe Trieste, a deep-diving submersible. In 1960, Piccard and Don Walsh made history by descending to the bottom of the Mariana Trench, the deepest part of the world's oceans, reaching a depth of about 36,000 feet. Throughout his career, Piccard contributed significantly to marine science and environmental awareness. He conducted numerous underwater expeditions and advocated for the protection of ocean ecosystems. His work has inspired generations of scientists and explorers interested in the mysteries of the deep sea.