Off the rugged coastline of Washington, Oregon, and southern British Columbia, the seafloor drops away into a landscape most ...

A Trident II D5 missile launches from deep underwater using gas pressure before its rocket ignites above the ocean surface.

Giant squid have never been seen alive in Australian waters. No camera has caught one drifting through the submarine canyons that slice into the continental shelf off Western Australia’s northwest ...

Add Yahoo as a preferred source to see more of our stories on Google. Chinese researchers have allegedly developed and tested a new underwater sensor that can detect aircraft from miles away. If ...

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 deep-sea training and engineering dive off the coast of San Diego provided an opportunity for never-before-seen imagery of the U.S. Navy submarine USS F-1, lost at sea in an accident on December 17, ...

If you've ever wondered what the safest place is to be during a tsunami, your first thought is most likely high on a mountaintop somewhere. But what about the depths of the ocean, in the fortified ...

While diesel engines don't need spark plugs, they do need air ventilation for proper combustion. This is a problem for vessels traveling underwater, such as submarines. Yet diesel submarines exist and ...