A discovery from the "complete darkness" of the Pacific Ocean seafloor is testing the scientific consensus on how oxygen is made and has even called into question the origins of life on Earth, a new ...

Deep-sea researchers have launched a groundbreaking project to investigate "dark oxygen"—a form of oxygen produced in total darkness on the ocean floor. The initiative follows last year's discovery of ...

Some 1,400 kilometers off the coast of Chile, rare deep-sea creatures drift along a garden of sponges and corals that grow along the flanks of a 3,100-meter-tall undersea mountain. A monthlong survey ...