James Cameron has become the third person in history to go the Mariana Trench’s Challenger Deep, the deepest part of the ocean. He went solo in a 2 1/2 inch thick steel ball, encased in a state of the art sub that was rigged with lights and cameras for filming. This video details a bit of history, and the technology and constraints behind the dive.
…or you can cut to the chase with this video of his return:
Finally, learn more about 170 million year old Mariana Trench and the tectonic forces behind it.