A new gravity map of Earth's seafloor fills in blanks and reveals its geologic history in greater detail.
A newly found seamount beneath the Pacific Ocean is about two-thirds of a mile high (1.1 kilometers), researchers said.
In an unexpected discovery, hundreds of gas plumes bubbling up from the seafloor were spotted during a sweeping survey of the U.S. Atlantic Coast.
It's not Mauna Loa, but a far larger expanse of lava on the seafloor 1,000 miles east of Japan. This monster is in the league of Olympus Mons on Mars.
Ocean modelers are tracking the denizens of the deep from the deluge of data collected during the Census of Marine Life.