78-year-old Sylvia Earle has spent about 7,000 hours (292 days) underwater and is continuing to make dives. Even more inspirational, Sylvia has made it her mission to push others to care more about the world’s oceans.
"The ocean dominates the way the world works, makes our lives possible. Take away the ocean, you’ve got a planet a lot like Mars," Sylvia says. "This is the sweet spot in time. Because never before could we know what we know, and never again will we have a chance, as good as we have now, to really make a difference."
The woman who has spent almost a year of her life underwater (The Atlantic)