So, James 'Titanic' Cameron made it to the bottom of the Mariana Trench, the deepest point in any of the world's oceans: 11,000m - deeper than Mt Everest is high. I've always been fascinated by this place, partly simply its utter remoteness, but also for the weird & wonderful creatures that exist down there. Over 4,000 people have climbed Mt Everest but there have only been two manned descents to the Mariana Trench. Would I want to go down myself? Yup.