The incredibly daunting, 2-months-and-counting hunt for missing Malaysia Airlines Flight 370 has covered 1.8 million square miles of the southern Indian Ocean and driven searchers to investigate where few have dared to explore. The Indian Ocean's average depth is 12,990 ft, about 2.5 miles below the surface of the water. World superpower US, for context, has only one manned vehicle, the Alvin submersible, capable of approaching that depth.
Because they're dealing primarily with the most hidden parts of our planet, searchers have solicited the technology and expertise of those who've been there before—at least via the equipment they've developed. Working in deep...