Technology opens up deep sea mining

There's gold in that thar sea floor. Silver, copper, zinc and lead, too. The problem is, it's a mile or two underwater and encased in massive mineral deposits that layer a dark, mysterious world. But new technology and worldwide demand have combined to make mining for these metals economically feasible for the first time. A breakthrough project is moving forward in New Guinea, and new rules to govern deep ocean mining will be set by an international authority this spring."