VideoLogic and NEC claim that their hidden surface removal system requires just 20% to 33% as much data to create images equal in quality to those of a polygon-based system.

FORBES: Comeback kid

Does hidden demand surface when prices in other areas are lowered?

FORBES: Connect

As well as this reduction in area, scientists believe that, hidden beneath the surface, the ice is growing ever thinner, setting up the Arctic for another sudden, catastrophic collapse.

ECONOMIST: An imminent answer to an Arctic riddle

This has enabled scientists to estimate the volume of water in the ice cap and speculate that much of the planet's original water is either hidden below the surface or missing.

BBC: By BBC News Online Science Editor Dr David Whitehouse

In a similar way to how large parts of icebergs are hidden below the sea surface, the turbine has a 100 metre draft that is anchored to the seabed with cables, that can be up to 700 metres long.

BBC: Floating wind turbine launched

Hidden 1, 000 feet beneath the surface of the Rocky Mountains lies the largest untapped oil reserve in the world.

FORBES: Obama Heads to Rio Sunday; Maximum Security Awaits

Brooks said U.S. Special Operations forces found 80 SA-2 or SA-3 surface-to-air missiles hidden within a ravine, and the U.S. Army 5th Corps found a weapons cache with 91 cases of TNT and plastic explosives, six homemade bombs, and 23 cases of rocket-propelled grenades -- and, elsewhere, the Corps found 10 small caches of ammunition and weapons.

CNN: U.S. says Iraq missions will go on

After fighting in tunnels and working under the surface of the sea, he ends up leading a hidden life of horror in a mining prison with thousands of others who lose everything, even their names, and never see the light of day again.

NEWYORKER: Dear Leader