Scientists track the fate of methane released by hydrates in a major canyon off the U.S. East Coast.
The competition aims at improved health and understanding of Earth's oceans by spurring teams to devise better robotic technologies for seafloor mapping and exploration.
New research shows that when ice in the seafloor melts, single-cell organisms metabolize the methane released, preventing the greenhouse gas from reaching the atmosphere.
An ultraslow-spreading stretch of the Southwest Indian Ridge is thicker than expected: both tectonic and volcanic processes may be feeding the growing seafloor there.
Scientists have long known that the Pacific Northwest is vulnerable to massive earthquakes, but newly unearthed data raises questions about the strength and frequency of these quakes.