Embark on a captivating journey to Earth's final frontier in this World Science Festival video featuring oceanographer Dr. Vicki Ferrini, marine biologist Dr. Helen Scales, and explorer Victor Vescovo, moderated by Brian Greene. Delve into the rich ecosystems, mineral treasures, and astounding kaleidoscope of life hidden beneath the ocean's surface. Discover how new technologies have revolutionized our understanding of the deep sea, once believed to be lifeless. Explore topics such as deep ocean mapping, the history of deep diving, marine snow, gigantic animals, hydrothermal vents, and chemosynthesis. Gain insights into the importance of human presence in deep-sea exploration and the potential implications for understanding life on Earth. This thought-provoking discussion, part of the Big Ideas series, challenges preconceptions about the ocean depths and illuminates the wonders of this unexplored realm.