Planetary scientist Alan Stern has suggested that some civilizations may live below a planet's surface.
Members of the gloomy octopus species have created their own underwater settlement dubbed 'Octlantis'.
Located off the coast of Vanuatu, this unique post office allows you to send postcards underwater.
A new science video has revealed what the view is like inside the mouth of a gargantuan great white.
A new video shows veteran free diver Guillaume Nery descending 131ft underwater on only one lungful of air.
The museum contains a collection of 300 sculptural works by British artist Jason deCaires Taylor.
Divers have discovered an underwater cave in the Czech Republic which descends to a depth of 1,325ft.
An old camera fished up from the bottom of the sea was found to contain some rather remarkable footage.
Underwater ruins off the Greek island of Zakynthos have turned out to be a geological phenomenon.
The remarkable cephalopod was captured on camera off Hawaii by a remotely operated underwater vehicle.
A prominent paleoanthropologist has suggested that we may eventually develop gills and live underwater.
An underwater camera has picked up rare footage of a large squid in the waters of Japan's Toyama Bay.
Archaeologists have discovered a mysterious stone monolith at the bottom of the Mediterranean.
A new way of growing food underwater is being tested out beneath the Bay of Noli in Savona, Italy.
What makes it possible for someone to survive for such a long time without being able to breathe ?
Despite cats having a reputation for disliking water the jaguar actually feels very much at home in it.
The impressive five-foot-long aquatic surveillance robot looks and moves like the real thing.
A remote-controlled submarine has discovered that the ice is a lot thicker in some places than expected.
A Japanese construction company is planning to build underwater complexes that corkscrew in to the ocean.
Archaeologists have uncovered the remains of a small settlement at the bottom of the ocean near Delos.