Undergrads use sonar to uncover Lake Union shipwrecks

Below the kayakers, seaplanes and construction cranes in Seattle's Lake Union lie unseen relics of the city's history. Shipwrecks from past generations rest just below the busy surface.

Multibeam sonar can map undersea gas seeps

A technology commonly used to map the bottom of the deep ocean can also detect gas seeps in the water column with remarkably high fidelity, according to scientists from the University of New Hampshire and the National Oceanic ...