The deep sea begins at about 200 meters below sea level, where light starts to diminish in a region called the twilight zone.

A group of scientists recently studied a strip of seabed southeast of Hawaii where a small scale experiment to mine nodules took place 44 years ago. There were still deep tread marks in the ocean ...

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

But it’s the Pacific Ocean that boasts the deepest waters on Planet Earth. About 125 miles east of the Mariana Islands—a U.S. territory north of Guam—lies the deepest place known to man.

A deep-sea training and engineering dive off the coast of San Diego provided an opportunity for never-before-seen imagery of ...

there are many ocean questions that science has yet to answer. Out of all the places in Earth's oceans, nowhere feels as scary and tantalizing as the Mariana Trench. Home to the deepest place on ...

On April 24, President Trump signed an executive order promoting deep-sea mining in the US and international waters, touting ...

But the size of the shelf and how quickly it descends toward the deepest parts of the ocean, known as the abyssal plain, varies from place to place. Early oceanographers thought the ocean bottom ...

The deep sea refers to the part of the ocean below 200 meters (656 ft.), at which light begins to disappear. Despite making up more than 90% of the Earth’s marine environment, much of the deep-sea ...

Mining firms claim the deep seabed could provide ... of unsanctioned mining taking place in areas beyond national jurisdiction," said Liz Karan, director of ocean governance at The Pew Charitable ...