A diver believes that he may have discovered a missing nuclear weapon at the bottom of the Arctic Ocean.
New research has suggested that another of Saturn's moons is home to a subsurface ocean of liquid water.
The find could make it much easier to search for evidence of extraterrestrial life in Europa's oceans.
Scientists believe that the dwarf planet's interior may be filled with large quantities of liquid water.
Scientists are set to embark on an ambitious mission to find out what is living beneath the ocean floor.
These carnivorous ocean-dwellers are now thought to be the longest-lived vertebrates on the planet.
The Okeanos Explorer vessel has revealed an undersea realm filled with weird and wonderful life forms.
Scientists have filmed an extremely rare type of fish more than 2,500ft below the surface of the sea.
Divers have discovered an ancient, minivan-sized sea sponge in an ocean ridge off the coast of Hawaii.
Scientists have determined how deep-sea creatures survived the asteroid impact that killed the dinosaurs.
An octopus in New Zealand called Inky managed to escape his tank and make his way back to the ocean.
Researchers have recorded footage of thousands of small crabs moving en masse off the coast of Panama.
The private space firm has finally succeeded in landing its Falcon 9 rocket on a barge out at sea.
A woman had to be rescued from the ocean after swimming for several hours in pursuit of a cruise liner.
New images from the New Horizons probe suggest that Charon once had a sub-surface ocean of liquid water.
The new vessel, which does not require a human crew, is designed to scour the ocean for enemy submarines.
Researchers have captured footage of a mysterious species of deep sea cephalopod off the coast of Hawaii.
Scientists are now confident that Saturn's icy moon is home to a subterranean ocean of liquid water.
Jupiter's volcanically active moon Io may possess a hidden subterranean ocean comprised of molten rock.
Professor Brian Cox has put forward the notion that Pluto may he capable of harboring primitive life.