Sylvia Alice Earle is an American marine biologist, explorer, author, and lecturer. Since 1998 she has been a National Geographic explorer-in-residence. Wikipedia*
On the C-SPAN Networks:
Sylvia Earle has seven videos in the C-SPAN Video Library; the first appearance was a 1997 Speech as a Chief Scientist for the National Oceanic and Atmospheric Administration. The year with the most videos was 2010 with two videos. Most common tag: Environment.