Hey, look what's down there...

 For some perspective, the Mariana Trench, a 2500 kilometer-long gash along the floor of the South Pacific, is as deep as Mount Everestis tall.  Recently, oceanographers from the University of New Hampshire discovered some new architecture lining the floor of the planet. With great precision, they’ve mapped vast bridges spanning the immense gap…and detected significant shifts in the walls of the trench. With us to explain the significance of these findingsis UNH affiliate professor Andrew Armstrong. He and James Gardner of UNH’s Center for Coastal and Ocean Mapping/Joint Hydrographic Center,  presented the findings at the recent American Geophysical Unionmeeting in San Francisco.