S ~ Sylvia Earle

American oceanographer and explorer, Sylvia Earle has led over 100 expeditions and logged more than 7,000 hours underwater. In 1970, she served as captain of the first all-female team to live underwater and in 1979 she walked untethered on the sea floor at a lower depth than any other woman before or since.

In 2009 Sylvia founded Mission Blue - a non-profit foundation for protecting and exploring the Earth's oceans. The gorup aims to establish marine protected areas or “Hope Spots.” around the world.

Source: Britannica, National Geographic, & TED