Sylvia Earle - Mapping the oceans
Sylvia Earle is the American oceanographer who is now helping Google to map the oceans. We may soon be able to see on our computers whales diving in real time, huge underwater canyons, and brightly coloured tropical fish.
Sylvia has been nicknamed "her Deepness" and "the Sturgeon General" because she has dived to the deepest parts of the ocean many times.
In fact she set the world women's depth record by diving 381 metres sitting on the nose of a submarine dressed in an astronaut's suit.
She has seen colours on the ocean floor for which names do not exist and coral that lights up when it's touched. She is passionate for the rest of the world to see what she has seen.
When Sylvia came to the Outlook studio she told Matthew Bannister how her enthusiasm for diving began in childhood.