January 23, 2013 By Dan Linehan Known to many as Her Deepness, Dr. Sylvia Earle,77, a researcher, author,and National Geographic explorer-in-residence, iswidely regarded as one ofthe most distinguished andaccomplished women ofscience. With nearly 7,000underwater hours under her weight belt, she once walkedalong the ocean seafloor,untethered, deeper than anyhuman before. And those whoknow her well are quick topoint out that she is still, withfists pumping, an aqua babe.