For the International Day of Women and Girls in Science, we"re visiting the Great Barrier Reef with oceanographer Dr. Sylvia Earle. This photo is from the 2014 documentary film "Mission Blue," which follows Earle, a legendary marine biologist, environmentalist, and National Geographic Explorer-in-Residence. The film focuses on Earle"s campaign to create a global network of protected marine sanctuaries. Sometimes called Her Deepness, Earle has made immense contributions to science over her career. From leading groundbreaking research in deep ocean science to becoming the first female chief scientist at the National Oceanic and Atmospheric Administration, Earle is recognized as one of the world"s preeminent oceanographers.