A new review of ocean data suggests that more than 99.999 percent of the global deep seafloor has never been seen by humans. But what does that really mean?

Victor Vescovo dove to the depths in all five of the world's oceans as part of his Five Deeps Expedition, including the ...

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 ...

Researchers collected more than 43,000 records of dives and assessed the photos and videos to determine how much of the bottom has been ... Learning more about the deep sea is essential for ...

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.