Scattered across an abyssal plain known as the Clarion-Clipperton Zone (CCZ) are polymetallic nodules that are a potato-sized ...

It’s easy to forget that beneath the sunlit waves, just past where the ocean’s blue turns to jet-black, lies a world teeming ...

Imagine descending into the ocean’s deep, dark twilight zone, a realm straight out of science fiction. Here, in a place where ...

MIT oceanographers discovered big fish like tuna and swordfish get a large fraction of their food from the ocean’s twilight zone — a cold, dark layer about half a mile below the surface.

In a groundbreaking discovery, scientists have identified a phenomenon they're calling "dark oxygen" — oxygen produced without any sunlight — 4,000 meters beneath the Pacific Ocean in the ...

The twilight, or mesopelagic, zone — the layer of ocean water that extends 200–1000 meters (656–3280 feet) deep — is an inhospitable place. “It’s completely dark, it’s extremely cold ...

My team will be able to study the deep seafloor into the hadal zone, an area ... This habitat, full of deep ocean trenches, is still poorly understood. The discovery of dark oxygen clearly has ...

Dark oxygen ... of the ocean bottom itself suggests one possible source: polymetallic nodules. These potato-sized lumps, composed of various metals, litter the seafloor where the researchers detected ...