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.

Cave, Lazio

Cave is a town and comune in the Latium region of Italy, 42 kilometres (26 mi) southeast of Rome. As of 2011 its population was of 10,421.

History

The town was mentioned first in 998 AD, and was later a fief of the Colonna family. In 1482 it was besieged by Pope Sixtus IV and obliged to surrender. It is especially known for the Treaty of Cave, signed on 12 September 1557 by plenipotentiaries of Pope Paul IV and Fernando Álvarez de Toledo, the Spanish viceroy of Naples.

Geography

Cave borders with Castel San Pietro Romano, Genazzano, Palestrina, Rocca di Cave, and Valmontone. It counts the hamlets (frazioni) of Collepalme and San Bartolomeo.

References

External links

Media related to Cave at Wikimedia Commons

Cave (name)

Cave is both a surname and a given name. Notable people with the name include:

Surname:

Slavery

Slavery is a legal or economic system in which principles of property law are applied to humans allowing them to be classified as property, to be owned, bought and sold accordingly, and they cannot withdraw unilaterally from the arrangement. While a person is a slave, the owner is entitled to the productivity of the slave's labour, without any remuneration. The rights and protection of the slave may be regulated by laws and customs in a particular time and place, and a person may become a slave from the time of their capture, purchase or birth.

Today, chattel slavery is unlawful in all countries, but a person may still be described as a slave if he or she is forced to work for another person without an ability on their part to unilaterally terminate the arrangement. Such situations are today commonly referred to as "practices similar to slavery". The present form of the slave trade is commonly referred to as human trafficking.

Slavery existed before written history and in many cultures. It was once institutionally recognized by most societies, but has now been outlawed in all countries, the last being Mauritania in 2007. However, it continues through such practices as debt bondage, serfdom, domestic servants kept in captivity, certain adoptions in which children are forced to work as slaves, child soldiers, human trafficking and forced marriage. Accordingly, there are more slaves today than at any time in history, with an estimated 20 million to 36 million slaves worldwide.

Scorpio (Blake's 7)

Scorpio is a fictional spacecraft featured throughout the fourth season of the British science fiction television series Blake's 7. It is a freighter, noted by Tarrant as an early Mk II "Wanderer-class" planet-hopper.

Scorpio was owned by an alleged salvage operator named Dorian, who had a base on the planet Xenon. Dorian rescues the crew of the recently destroyed Liberator, who are stranded on the planet Terminal. The Liberator crew later kill Dorian in self-defence, occupy the Xenon base and use Scorpio for their own purposes.

When not in use, Scorpio was docked in an underground silo within the Xenon Base. When in flight, only the flight deck part of the ship would normally be pressurised and if the crew needed to go to another part of the ship during flight they had to pressurise that area first. Unlike Liberator, which was superior in speed and weaponry to the Terran Federation's finest warships, Scorpio was initially disadvantaged in comparison. It was slow, ungainly and has little weaponry until the crew modify the ship to increase its capabilities. In the episode "Power", Avon and Orac complete construction of a teleport system for the ship, similar to that seen on Liberator (Dorian had started to create a teleport himself but failed). In the episode "Star Drive", Scorpio is fitted with a new, experimental engine called the 'photonic drive', developed by Doctor Plaxton. This vastly increases the ship's speed to the equivalent of Time Distort 15 but in real time (i.e. without the need for the ship to move into a "time-distorted" dimension) thereby making Scorpio faster than the Liberator had been. The photonic drive is powered by light rather than plasma.

Sexual slavery (BDSM)

Sexual slavery in a BDSM relationship refers to a submissive person in a BDSM relationship consenting to a dominant person (also called a slave owner or the master or mistress) treating the submissive as their slave, i.e., their property. Sexual slavery in a BDSM context is both a sexual fantasy or sexual roleplay. The slave master or mistress might be any person or group, though the majority of such relationships are usually either one dominant, or a committed dominant couple, owning one or more slaves. A sex slave and the owner, and others involved in the relationship, can be of any gender, sexual identity, or orientation.

Terminology

The use of the term 'sex slave' rather than just 'slave' is sometimes used to differentiate between consensual slavery and non-consensual slavery, because sex is not a necessary component of consensual slavery. In BDSM, a slave is a specific type of submissive. Not all submissives are slaves, though all slaves would normally be considered submissive in the relationship. However some calling themselves 'slave' may only be submissive within a sexual context/activity whilst others are also submissive within other or all aspects of the relationship, 'sex-slave' or 'slave' respectfully.