Ivory

Ivory is a hard, white material from the tusks (traditionally elephant's) and teeth of animals, that can be used in art or manufacturing. It consists mainly of dentine (inorganic formula Ca₁₀(PO₄)₆(CO₃).H₂O)), one of the physical structures of teeth and tusks. The chemical structure of the teeth and tusks of mammals is the same, regardless of the species of origin. The trade in certain teeth and tusks other than elephant is well established and widespread; therefore, "ivory" can correctly be used to describe any mammalian teeth or tusks of commercial interest which are large enough to be carved or scrimshawed. It has been valued since ancient times for making a range of items, from ivory carvings to false teeth, fans, and dominoes.Elephant ivory is the most important source, but ivory from mammoth, walrus, hippopotamus, sperm whale, killer whale, narwhal and wart hog are used as well. Elk also have two ivory teeth, which are believed to be the remnants of tusks from their ancestors.

Ivory (disambiguation)

Ivory is a substance found in the teeth and tusks of animals such as elephants.

Ivory may also refer to:

People

Other uses

Ivory (mango)

The Ivory, also called the jingu ivory, is a mango cultivar from China. It is named for its resemblance to a young elephant's tusk due to its long, thin shape. It has thin skin, smooth skin. The flesh contains very few fibres, and constitutes approximately 82 percent of the fruit. It was first introduced into Yunnan, China from Thailand in 1914. The actual tree that was the first to be imported still grows, and during one year produced almost 500 kg of fruit.

References

Technology

Technology ("science of craft", from Greek τέχνη, techne, "art, skill, cunning of hand"; and -λογία, -logia) is the collection of techniques, skills, methods and processes used in the production of goods or services or in the accomplishment of objectives, such as scientific investigation. Technology can be the knowledge of techniques, processes, etc. or it can be embedded in machines, computers, devices and factories, which can be operated by individuals without detailed knowledge of the workings of such things.

The human species' use of technology began with the conversion of natural resources into simple tools. The prehistoric discovery of how to control fire and the later Neolithic Revolution increased the available sources of food and the invention of the wheel helped humans to travel in and control their environment. Developments in historic times, including the printing press, the telephone, and the Internet, have lessened physical barriers to communication and allowed humans to interact freely on a global scale. The steady progress of military technology has brought weapons of ever-increasing destructive power, from clubs to nuclear weapons.

Technology (disambiguation)

Technology is the collection of tools, including machinery, modifications, arrangements and procedures used by humans.

Technology may also refer to:

See also

Technology (band)

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Technology is a Soviet-Russian synthpop band created by Leonid Velichkovsky, Andrey Kokhaev, Roman Ryabtsev, participants of group "Bioconstructor", in 1990.

Members

Discography

Studio albums

Compilations and remixes

Singles

Music Videos

References

External links