Cave

A cave or cavern is a hollow place in the ground, especially a natural underground space large enough for a human to enter. Caves form naturally by the weathering of rock and often extend deep underground. The word cave can also refer to much smaller openings such as sea caves, rock shelters, and grottos.

Speleology is the science of exploration and study of all aspects of caves and the cave environment. Visiting or exploring caves for recreation may be called caving, potholing, or spelunking.

Types and formation

The formation and development of caves is known as speleogenesis. Caves are formed by various geologic processes and can be variable sizes. These may involve a combination of chemical processes, erosion from water, tectonic forces, microorganisms, pressure, and atmospheric influences.

It is estimated that the maximum depth of a cave cannot be more than 3,000 metres (9,800 ft) due to the pressure of overlying rocks. For karst caves the maximum depth is determined on the basis of the lower limit of karst forming processes, coinciding with the base of the soluble carbonate rocks.

Bohemia Interactive

Bohemia Interactive (BI), also known as Bohemia Interactive Studio (BIS), is an independent developer and publisher of video games, based in Prague, Czech Republic. Founded in 1999, the company's CEO is Marek Španěl, who is also the co-owner of the company.

Bohemia Interactive is a member of IDEA Games, which functions as a publisher and consultant for several independent developers.

Operation Flashpoint

Bohemia's release of Operation Flashpoint: Cold War Crisis in 2001 into the international market won BI several prestigious awards. At London's ECTS show of 2001, BI won the "Best PC Game Developer of the Year" award. In addition, BI was also awarded "Rookie Studio of the Year" at GDC 2002.

The debut game of BI, published by Codemasters, immediately became the top selling game in the United Kingdom, Germany, France, Australia, Czech Republic and other countries. After this success BI prepared a special US version of the game which launched in September 2001 and it also became one of the best selling games in the USA.

Thank You

"Thank you" is a common expression of gratitude. It often refers to a thank you letter, a letter written to express appreciation.

Thank You or Thank U may also refer to:

Film and television

Albums