Conservationists say retrieving mineral-rich rocks will destroy sea life. Environmental studies show conflicting results.

Scientists discovered 24 new deep-sea species, including one from a completely new branch of life in the Pacific Ocean.

Japan’s deepest ocean trenches are full of strange life, from record-setting fish to mysterious animals that still defy ...

More than 10,000 feet deep in the ocean, the seafloor is covered with what look like dark, lumpy potatoes. These polymetallic nodules, as they're known, take millions of years to form, slowly ...

Marine microbiologist Professor Jeffrey Marlow explores the deep ocean.