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Domestic Pigeon
The domestic pigeon (''Columba livia domestica'' or ''Columba livia'' Form (zoology), forma ''domestica'') is a pigeon subspecies that was derived from the rock dove, rock dove or rock pigeon. The rock pigeon is the world's oldest domesticated bird. Mesopotamian Cuneiform script, cuneiform tablets mention the domestication of pigeons more than 5,000 years ago, as do Egyptian hieroglyphics. Pigeons have held historical importance to humans as Squab, food, Companion animal, pets, Doves as symbols, holy animals, and Carrier Pigeon, messengers. Due to their homing ability, pigeons have been used to deliver messages, including War pigeon, during the world wars. Despite this, city pigeons, which are feral birds, are generally seen as Pest (organism), pests, mainly due to their feces, droppings and a reputation for Natural reservoir, spreading disease. History of domestication Despite the long history of pigeons, little is known about the specifics of their initial domestication. W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Selective Breeding
Selective breeding (also called artificial selection) is the process by which humans use animal breeding and plant breeding to selectively develop particular phenotypic traits (characteristics) by choosing which typically animal or plant males and females will sexually reproduce and have offspring together. Domesticated animals are known as breeds, normally bred by a professional breeder, while domesticated plants are known as varieties, cultigens, cultivars, or breeds. Two purebred animals of different breeds produce a crossbreed, and crossbred plants are called hybrids. Flowers, vegetables and fruit-trees may be bred by amateurs and commercial or non-commercial professionals: major crops are usually the provenance of the professionals. In animal breeding artificial selection is often combined with techniques such as inbreeding, linebreeding, and outcrossing. In plant breeding, similar methods are used. Charles Darwin discussed how selective breeding had been succ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Feces
Feces (also known as faeces American and British English spelling differences#ae and oe, or fæces; : faex) are the solid or semi-solid remains of food that was not digested in the small intestine, and has been broken down by bacteria in the large intestine. Feces contain a relatively small amount of metabolic waste products such as bacterially-altered bilirubin and dead epithelial cells from the lining of the gut. Feces are discharged through the anus or cloaca during defecation. Feces can be used as fertilizer or soil conditioner in agriculture. They can also be burned as dry animal dung fuel, fuel or dried and used for wattle and daub, construction. Some medicinal uses have been found. In the case of human feces, fecal transplants or fecal bacteriotherapy are in use. Urine and feces together are called excretion, excreta. Characteristics The distinctive odor of feces is due to skatole, and thiols (sulfur-containing compounds), as well as amines and carboxylic acids. Sk ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ancient Egyptians
Ancient Egypt () was a cradle of civilization concentrated along the lower reaches of the Nile River in Northeast Africa. It emerged from prehistoric Egypt around 3150BC (according to conventional Egyptian chronology), when Upper and Lower Egypt were amalgamated by Menes, who is believed by the majority of Egyptologists to have been the same person as Narmer. The history of ancient Egypt unfolded as a series of stable kingdoms interspersed by the " Intermediate Periods" of relative instability. These stable kingdoms existed in one of three periods: the Old Kingdom of the Early Bronze Age; the Middle Kingdom of the Middle Bronze Age; or the New Kingdom of the Late Bronze Age. The pinnacle of ancient Egyptian power was achieved during the New Kingdom, which extended its rule to much of Nubia and a considerable portion of the Levant. After this period, Egypt entered an era of slow decline. Over the course of its history, it was invaded or conquered by a number of foreign civ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dovecote
A dovecote or dovecot , doocot (Scots Language, Scots) or columbarium is a structure intended to house Domestic pigeon, pigeons or doves. Dovecotes may be free-standing structures in a variety of shapes, or built into the end of a house or barn. They generally contain pigeonholes for the birds to nest. Pigeons and doves were an important food source historically in the Middle East and Europe and were kept for their eggs and dung. History and geography The oldest dovecotes are thought to have been the fortress-like dovecotes of Upper Egypt and the domed dovecotes of Iran. In these regions the droppings were used by farmers for fertilization. Pigeon droppings were also used for leather tanning and making gunpowder. In some cultures, particularly Medieval Europe, the possession of a dovecote was a symbol of status and power and was consequently regulated by law. Only nobles had this special privilege, known as ''droit de colombier''. Many ancient Manorialism, manors in Franc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rock Formation
A rock formation is an isolated, scenic, or spectacular surface rock (geology), rock outcrop. Rock formations are usually the result of weathering and erosion sculpting the existing rock. The term ''rock Geological formation, formation'' can also refer to specific sedimentary stratum, strata or other rock unit in stratigraphy, stratigraphic and petrology, petrologic studies. A rock structure can be created in any rock type or combination: * Igneous rocks are created when molten rock cools and solidifies, with or without crystallisation. They may be either plutonic bodies or volcanic extrusive. Again, erosive forces sculpt their current forms. * Metamorphic rocks are created by rocks that have been transformed into another kind of rock, usually by some combination of heat, pressure, and chemical alteration. * Sedimentary rocks are created by a variety of processes but usually involving deposition, grain by grain, layer by layer, in water or, in the case of terrestrial se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cappadocia
Cappadocia (; , from ) is a historical region in Central Anatolia region, Turkey. It is largely in the provinces of Nevşehir, Kayseri, Aksaray, Kırşehir, Sivas and Niğde. Today, the touristic Cappadocia Region is located in Nevşehir province. According to Herodotus, in the time of the Ionian Revolt (499 BC), the Cappadocians were reported as occupying a region from the Taurus Mountains to the vicinity of the Euxine (Black Sea). Cappadocia, in this sense, was bounded in the south by the chain of mountains that separate it from Cilicia, to the east by the upper Euphrates, to the north by the Pontus, and to the west by Lycaonia and eastern Galatia. Van Dam, R. ''Kingdom of Snow: Roman rule and Greek culture in Cappadocia.'' Philadelphia: University of Pennsylvania Press, 2002, p.13 The name, traditionally used in Christianity, Christian sources throughout history, continues in use as an international tourism concept to define a region of exceptional natural wond ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uçhisar
Uçhisar is a town (''belde'') in the Nevşehir District, Nevşehir Province in Cappadocia, Turkey. Its population is 3,555 (2022). It is 7 kilometres east of Nevşehir, 12 kilometres west of Ürgüp, and 10 kilometres south of Avanos. Situated on the edge of Göreme National Park, Uçhisar consists of an old village huddled around the base of a huge rock cone and a new one closer to the road that runs from Nevşehir town to Göreme. Like most of Cappadocia, Uçhisar once made a living from agriculture but now depends almost entirely on tourism, with many of its fine old stone houses turned into boutique hotels. French people, French incomers and Turks in France, Turks returning from France have played a large part in the move to convert the houses into hotels. Uçhisar means "outer citadel" in Turkish and refers to the huge rock cone that is its central feature. The Güvercinlik Valley that overlooks Uçhisar was known as Vasil Potamus or Vasilius (Basilius, named afte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canadian Broadcasting Corporation
The Canadian Broadcasting Corporation (), branded as CBC/Radio-Canada, is the Canadian Public broadcasting, public broadcaster for both radio and television. It is a Crown corporation that serves as the national public broadcaster, with its English-language and French-language service units known as CBC and Radio-Canada, respectively. Although some local stations in Canada predate its founding, the CBC is the oldest continually-existing broadcasting network in Canada. The CBC was established on November 2, 1936. The CBC operates four terrestrial radio networks: The English-language CBC Radio One and CBC Music, and the French-language Ici Radio-Canada Première and Ici Musique (international radio service Radio Canada International historically transmitted via shortwave radio, but since 2012 its content is only available as podcasts on its website). The CBC also operates two terrestrial television networks, the English-language CBC Television and the French-language Ici Radio-C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dovecote At Nymans Gardens, West Sussex, England May 2006 3
A dovecote or dovecot , doocot (Scots Language, Scots) or columbarium is a structure intended to house Domestic pigeon, pigeons or doves. Dovecotes may be free-standing structures in a variety of shapes, or built into the end of a house or barn. They generally contain pigeonholes for the birds to nest. Pigeons and doves were an important food source historically in the Middle East and Europe and were kept for their eggs and dung. History and geography The oldest dovecotes are thought to have been the fortress-like dovecotes of Upper Egypt and the domed dovecotes of Iran. In these regions the droppings were used by farmers for fertilization. Pigeon droppings were also used for leather tanning and making gunpowder. In some cultures, particularly Medieval Europe, the possession of a dovecote was a symbol of status and power and was consequently regulated by law. Only nobles had this special privilege, known as ''droit de colombier''. Many ancient Manorialism, manors in Franc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Written History
Recorded history or written history describes the historical events that have been recorded in a written form or other documented communication which are subsequently evaluated by historians using the historical method. For broader world history, recorded history begins with the accounts of the ancient world around the 4th millennium BCE, and it coincides with the invention of writing. For some geographic regions or cultures, written history is limited to a relatively recent period in human history because of the limited use of written records. Moreover, human cultures do not always record all of the information which is considered relevant by later historians, such as the full impact of natural disasters or the names of individuals. Recorded history for particular types of information is therefore limited based on the types of records kept. Because of this, recorded history in different contexts may refer to different periods of time depending on the topic. The interpretat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossil Record
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood and DNA remnants. The totality of fossils is known as the ''fossil record''. Though the fossil record is incomplete, numerous studies have demonstrated that there is enough information available to give a good understanding of the pattern of diversification of life on Earth. In addition, the record can predict and fill gaps such as the discovery of '' Tiktaalik'' in the arctic of Canada. Paleontology includes the study of fossils: their age, method of formation, and evolutionary significance. Specimens are sometimes considered to be fossils if they are over 10,000 years old. The oldest fossils are around 3.48 billion years to 4.1 billion years old. Early edition, published online before print. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wild Type
The wild type (WT) is the phenotype of the typical form of a species as it occurs in nature. Originally, the wild type was conceptualized as a product of the standard "normal" allele at a locus, in contrast to that produced by a non-standard, " mutant" allele. "Mutant" alleles can vary to a great extent, and even become the wild type if a genetic shift occurs within the population. Continued advancements in genetic mapping technologies have created a better understanding of how mutations occur and interact with other genes to alter phenotype. It is now regarded that most or all gene loci exist in a variety of allelic forms, which vary in frequency throughout the geographic range of a species, and that a uniform wild type does not exist. In general, however, the most prevalent allele – i.e., the one with the highest gene frequency – is the one deemed wild type. The concept of wild type is useful in some experimental organisms such as fruit flies ''Drosophila melanogaster'', ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
