As we celebrate World Ocean Day, new research shows the role that the ocean twilight zone plays in keeping the planet healthy ...

In decades of deep-sea exploration, humans have observed less than 0.001% of the deep ocean floor - an area about the size of ...

To survive the deep ocean, sea creatures need all kinds of adaptations that give them alien-like appearances, like huge eyes ...

What they found instead was a series of brine pools—deep pockets of hypersaline water that sit at the bottom of the sea, forming some of the most hostile environments on Earth. Unlike normal ...

The never-before-seen footage of sea creatures struggling in fishing nets is featured in National Geographic’s new documentary Ocean with David Attenborough.

Half a century after the world's first deep sea mining tests picked nodules from the seafloor off the US east coast, the damage has barely begun to heal.

In 1917, two US submarines collided off the coast of San Diego and submarine USS F-1 sank to the bottom of the Pacific Ocean, ...

Researchers say our understanding of Earth’s largest biome is based on a tiny, unrepresentative sample dominated by just a ...

Mining the deep oceans for cobalt ... The problem is that the bottom of the sea isn’t one uniform environment but has its own mountains and valleys and unique ecosystems, some of them unexplored.

Some deep-sea creatures are named after frightening ... You can identify goblin sharks, a rarely seen bottom-dwelling species, by the shape of their snouts, which are long and flat.