Researchers descended more than 35,700 feet (10,900 meters) below sea level to collect biological samples that revealed ...

Could lumpy metallic rocks in the deepest, darkest reaches of the ocean be making oxygen in the absence of sunlight?

Debris produced by human activity has now been spotted at a depth of 5,112 meters (3.2 miles) in the Mediterranean Sea.

Ocean depth is divided into zones: littoral, bathyal, abyssal and hadal. The deepest part of the ocean, the hadal zone, is anywhere deeper than six kilometres. What is the average depth of the ocean?

They're tiny, blobby, butt-shaped, and glow in the dark. What the heck are they? Scientists are still figuring them out.

Traces of organisms detected in sediments from 7.5 kilometers below the ocean surface reveal how organisms living in the deep sea are engineering their own environments. Analyses of sediment cores ...