NATO has expanded its footprint in the North Atlantic, partially in response to an increased Russian submarine presence.

Add Yahoo as a preferred source to see more of our stories on Google. A Russian submarine was deployed alongside a spy ship to map critical undersea infrastructure around Britain, it has emerged. An ...

The modern internet still depends on something surprisingly physical: a lattice of seafloor cables that carries nearly ...

China has live streamed footage of its new manned submersible parked at the bottom of the Mariana Trench as part of a historic mission into the deepest underwater valley on the planet. Fendouzhe is ...

The Trump administration announced this past week that it has entered talks with the Cook Islands to research and develop seabed mineral resources. The Polynesian archipelago is one of only a handful ...

Unfortunately, as far as the Mediterranean is concerned, it would not be wrong to say that "not a single inch of it is clean." ...

Beneath Antarctica's vast expanse of ice sit hundreds of canyons, some up to tens of thousands of feet deep. These complex formations under a seemingly barren landscape play a significant role in ...

A lot of weird-looking life-forms lurk in the deep sea, and this year we got some spectacularly close looks at several of them, including a goofy Doctor Who–esque octopus, alienlike Antarctic dwellers ...

A Russian submarine was deployed alongside a spy ship to map critical undersea infrastructure around Britain, it has emerged. An anti-submarine Merlin Mk2 helicopter could be seen from the photo ...