May 20th, 2013
Episode 268 of 570 episodes
This week’s Discovery makes a voyage into the ocean’s mysterious depths. The BBC’s science news editor David Shukman joins a team of scientists sending a robot submarine 5000 metres into an undiscovered realm of volcanic activity and strange creatures new to science. But just as we begin to explore the sea’s last great secrets, could they be under threat from a new global industry – deep sea mining?