1.
Argentina
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Argentina, officially the Argentine Republic, is a federal republic in the southern half of South America. With a mainland area of 2,780,400 km2, Argentina is the eighth-largest country in the world, the second largest in Latin America, and the largest Spanish-speaking one. The country is subdivided into provinces and one autonomous city, Buenos Aires. The provinces and the capital have their own constitutions, but exist under a federal system, Argentina claims sovereignty over part of Antarctica, the Falkland Islands, and South Georgia and the South Sandwich Islands. The earliest recorded presence in the area of modern-day Argentina dates back to the Paleolithic period. The country has its roots in Spanish colonization of the region during the 16th century, Argentina rose as the successor state of the Viceroyalty of the Río de la Plata, a Spanish overseas viceroyalty founded in 1776. The country thereafter enjoyed relative peace and stability, with waves of European immigration radically reshaping its cultural. The almost-unparalleled increase in prosperity led to Argentina becoming the seventh wealthiest developed nation in the world by the early 20th century, Argentina retains its historic status as a middle power in international affairs, and is a prominent regional power in the Southern Cone and Latin America. Argentina has the second largest economy in South America, the third-largest in Latin America and is a member of the G-15 and it is the country with the second highest Human Development Index in Latin America with a rating of very high. Because of its stability, market size and growing high-tech sector, the description of the country by the word Argentina has to be found on a Venice map in 1536. In English the name Argentina probably comes from the Spanish language, however the naming itself is not Spanish, Argentina means in Italian of silver, silver coloured, probably borrowed from the Old French adjective argentine of silver > silver coloured already mentioned in the 12th century. The French word argentine is the form of argentin and derives of argent silver with the suffix -in. The Italian naming Argentina for the country implies Argentina Terra land of silver or Argentina costa coast of silver, in Italian, the adjective or the proper noun is often used in an autonomous way as a substantive and replaces it and it is said lArgentina. The name Argentina was probably first given by the Venitian and Genoese navigators, in Spanish and Portuguese, the words for silver are respectively plata and prata and of silver is said plateado and prateado. Argentina was first associated with the silver mountains legend, widespread among the first European explorers of the La Plata Basin. The first written use of the name in Spanish can be traced to La Argentina, a 1602 poem by Martín del Barco Centenera describing the region, the 1826 constitution included the first use of the name Argentine Republic in legal documents. The name Argentine Confederation was also used and was formalized in the Argentine Constitution of 1853. In 1860 a presidential decree settled the name as Argentine Republic
2.
Cave
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A cave is a hollow place in the ground, specifically 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. A cavern is a type of cave, naturally formed in soluble rock with the ability to grow speleothems. Speleology is the science of exploration and study of all aspects of caves, visiting or exploring caves for recreation may be called caving, potholing, or spelunking. The formation and development of caves is known as speleogenesis, which can occur over the course of millions of years, caves are formed by various geologic processes and can be variable sizes. These may involve a combination of processes, erosion from water, tectonic forces, microorganisms, pressure. Isotopic dating techniques can be applied to cave sediments, in order to determine the timescale when geologic events may have occurred to help form and it is estimated that the maximum depth of a cave cannot be more than 3,000 metres due to the pressure of overlying rocks. For karst caves the maximum depth is determined on the basis of the limit of karst forming processes. Most caves are formed in limestone by dissolution, solutional caves or karst caves are the most frequently occurring caves and such caves form in rock that is soluble. Most occur in limestone, but they can form in other rocks including chalk, dolomite, marble, salt. Rock is dissolved by acid in groundwater that seeps through bedding planes, faults, joints. Over geological epochs cracks expand to become caves and cave systems, the largest and most abundant solutional caves are located in limestone. Limestone dissolves under the action of rainwater and groundwater charged with H2CO3, the dissolution process produces a distinctive landform known as karst, characterized by sinkholes and underground drainage. Limestone caves are often adorned with calcium carbonate formations produced through slow precipitation and these include flowstones, stalactites, stalagmites, helictites, soda straws and columns. These secondary mineral deposits in caves are called speleothems, the portions of a solutional cave that are below the water table or the local level of the groundwater will be flooded. Lechuguilla Cave in New Mexico and nearby Carlsbad Cavern are now believed to be examples of type of solutional cave. They were formed by H2S gas rising from below, where reservoirs of oil give off sulfurous fumes and this gas mixes with ground water and forms H2SO4. The acid then dissolves the limestone from below, rather than from above, caves formed at the same time as the surrounding rock are called primary caves
3.
Cave painting
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Cave paintings are painted drawings on cave walls or ceilings, mainly of prehistoric origin, to some 40,000 years ago in Eurasia. The exact purpose of the Paleolithic cave paintings is not known, evidence suggests that they were not merely decorations of living areas since the caves in which they have been found do not have signs of ongoing habitation. They are also located in areas of caves that are not easily accessible. Some theories hold that cave paintings may have been a way of communicating with others, the paintings are remarkably similar around the world, with animals being common subjects that give the most impressive images. Humans mainly appear as images of hands, mostly hand stencils made by blowing pigment on a hand held to the wall. The earliest known cave paintings/drawings of animals are at least 35,000 years old and are found in Pettakere cave on the island of Sulawesi in Indonesia, previously it was believed that the earliest paintings were in Europe. The earliest non-figurative rock art dates back to approximately 40,000 years ago, nearly 340 caves have now been discovered in France and Spain that contain art from prehistoric times. But subsequent technology has made it possible to date the paintings by sampling the pigment itself, the choice of subject matter can also indicate chronology. For instance, the reindeer depicted in the Spanish cave of Cueva de las Monedas places the drawings in the last Ice Age. The oldest date given to a cave painting is now a pig that has a minimum age of 35,400 years old at Pettakere cave in Sulawesi. Indonesian and Australian scientists have dated other non-figurative paintings on the walls to be approximately 40,000 years old, the method they used to confirm this was dating the age of the stalactites that formed over the top of the paintings. The art is similar in style and method to that of the Indonesian caves as there were also hand stencils and this date coincides with the earliest known evidence for Homo sapiens in Europe. Because of the cave arts age, some scientists have conjectured that the paintings may have made by Neanderthals. The earliest known European figurative cave paintings are those of Chauvet Cave in France and these paintings date to earlier than 30,000 BCE according to radiocarbon dating. Some researchers believe the drawings are too advanced for this era, the radiocarbon dates from these samples show that there were two periods of creation in Chauvet,35,000 years ago and 30,000 years ago. In 2009, cavers discovered drawings in Coliboaia Cave in Romania, an initial dating puts the age of an image in the same range as Chauvet, about 32,000 years old. Some caves probably continued to be painted over a period of thousands of years. This was created roughly between 10,000 and 5,500 years ago, and painted in rock shelters under cliffs or shallow caves, though individual figures are less naturalistic, they are grouped in coherent grouped compositions to a much greater degree
4.
Radiocarbon dating
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Radiocarbon dating is a method for determining the age of an object containing organic material by using the properties of radiocarbon, a radioactive isotope of carbon. The method was developed by Willard Libby in the late 1940s, Libby received the Nobel Prize for his work in 1960. The radiocarbon dating method is based on the fact that radiocarbon is constantly being created in the atmosphere by the interaction of cosmic rays with atmospheric nitrogen. The resulting radiocarbon combines with oxygen to form radioactive carbon dioxide. When the animal or plant dies, it stops exchanging carbon with its environment, and from that point onwards the amount of 14C it contains begins to decrease as the 14C undergoes radioactive decay. Measuring the amount of 14C in a sample from a plant or animal such as a piece of wood or a fragment of bone provides information that can be used to calculate when the animal or plant died. The idea behind radiocarbon dating is straightforward, but years of work were required to develop the technique to the point where accurate dates could be obtained. Research has been ongoing since the 1960s to determine what the proportion of 14C in the atmosphere has been over the past fifty thousand years. The resulting data, in the form of a curve, is now used to convert a given measurement of radiocarbon in a sample into an estimate of the samples calendar age. Other corrections must be made to account for the proportion of 14C in different types of organisms, additional complications come from the burning of fossil fuels such as coal and oil, and from the above-ground nuclear tests done in the 1950s and 1960s. Conversely, nuclear testing increased the amount of 14C in the atmosphere, measurement of radiocarbon was originally done by beta-counting devices, which counted the amount of beta radiation emitted by decaying 14C atoms in a sample. The development of dating has had a profound impact on archaeology. In addition to permitting more accurate dating within archaeological sites than previous methods, histories of archaeology often refer to its impact as the radiocarbon revolution. Radiocarbon dating has allowed key transitions in prehistory to be dated, such as the end of the last ice age, and they synthesized 14C using the laboratorys cyclotron accelerator and soon discovered that the atoms half-life was far longer than had been previously thought. This was followed by a prediction by Serge A. Korff, then employed at the Franklin Institute in Philadelphia and it had previously been thought that 14C would be more likely to be created by deuterons interacting with 13C. At some time during World War II, Willard Libby, who was then at Berkeley, learned of Korffs research, in 1945, Libby moved to the University of Chicago where he began his work on radiocarbon dating. He published a paper in 1946 in which he proposed that the carbon in living matter might include 14C as well as non-radioactive carbon, by contrast, methane created from petroleum showed no radiocarbon activity because of its age. The results were summarized in a paper in Science in 1947, Libby and James Arnold proceeded to test the radiocarbon dating theory by analyzing samples with known ages
5.
Silhouette
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A silhouette is the image of a person, animal, object or scene represented as a solid shape of a single color, usually black, with its edges matching the outline of the subject. The interior of a silhouette is featureless, and the whole is typically presented on a background, usually white. The silhouette differs from an outline, which depicts the edge of an object in a linear form, while a silhouette appears as a solid shape. Silhouette images may be created in any visual media, but was first used to describe pieces of cut paper, which were then stuck to a backing in a contrasting colour. Other artists, especially from about 1790, drew an outline on paper, then painted it in, anything that appears this way, for example, a figure standing backlit in a doorway, may be described as in silhouette. Because of de Silhouettes austere economies, his name synonymous with anything done or made cheaply. Prior to the advent of photography, silhouette profiles cut from black card were the cheapest way of recording a persons appearance, the term silhouette, although existing from the 18th century, was not applied to the art of portrait-making until the 19th century. The silhouette is closely tied in mythology to the origins of art, pliny the Elder, in his Natural History Books XXXIV and XXXV, recounts the origin of painting. In Chapter 5 of Book XXXV, he writes, “We have no knowledge as to the commencement of the art of painting. The Egyptians assert that it was invented among themselves, six years before it passed into Greece. As to the Greeks, some say that it was invented at Sicyon, others at Corinth, but they all agree that it originated in tracing lines round the human shadow. “. In Chapter 15, he tells the story of Butades of Corinth, “Butades, a potter of Sicyon, was the first who invented, at Corinth, the art of modelling portraits in the earth which he used in his trade. Upon seeing this, her father filled in the outline, by compressing clay upon the surface, and so made a face in relief, the pots themselves exhibit strong forms in outline that are indicators of their purpose, as well as being decorative. For this reason profile portraits have been employed on coinage since the Roman era, the early Renaissance period saw a fashion for painted profile portraits and people such as Federico da Montefeltro and Ludovico Sforza were depicted in profile portraits. The profile portrait is linked to the silhouette. This is an important concept for artists who design characters for visual media, a silhouette portrait can be painted or drawn. However, the method of creating silhouette portraits is to cut them from lightweight black cardboard. This was the work of specialist artists, often working out of booths at fairs or markets, a traditional silhouette portrait artist would cut the likeness of a person, freehand, within a few minutes
6.
National Route 40 (Argentina)
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The southern part of the route, a largely unpaved road through sparsely populated territory, has become a well-known adventure tourism journey, although it is now planned to pave the whole road. Route 40 is the longest route in Argentina and one of the longest in the world, the road crosses the provinces of Santa Cruz, Chubut, Río Negro, Neuquen, Mendoza, San Juan, La Rioja, Catamarca, Tucumán, Salta and Jujuy. The attraction is actually international in scope, and many throughout the world advertise the private. RN40 begins at the Bolivian border at La Quiaca, from San Juan RN40 is a busy highway to Mendoza. From Mendoza RN40 continues south to Pareditas, Malargüe, Chos Malal and it takes a route to the east of Bariloche to El Maitén and a junction with RN258 at Leleque. It then passes near Esquel and continues by Tecka, José de San Martín, the road then enters the most remote part of its route. 124 km south of Perito Moreno is a junction with a road to Cueva de las Manos. From Tres Lagos the road is paved to a junction 32 km east of El Calafate and another junction at El Cerrito, where RN40 leaves the main highway to Rio Gallegos. The route then takes a route to Rio Gallegos through the town of 28 de Noviembre. It reaches the Atlantic coast at Punta Loyola, at the mouth of the Gallegos River 36 km from Rio Gallegos, since the beginning of its construction in 1935, the route has changed several times. That zero-km marker was moved to the eastern access point of that city, at the intersection of Route 7. The intent of new legislation and remarking of roadways will move the northern terminus of Route 40 to the frontier with Bolivia near the location of Ciénaga de Paicone. The agreement was ratified by provincial law 5520, accordingly, the section of the road between San Antonio de los Cobres and Abra Pampa is renamed National Route 1V40. On February 2009, president Cristina Kirchner announced that the remaining unpaved length of the route in Santa Cruz was going to be paved, official Site Route 40 - Argentine longest
7.
Guanaco
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The guanaco, a camelid native to South America, stands between 1.0 and 1.2 m at the shoulder and weighs 90 to 140 kg. Its color varies very little, ranging from a brown to dark cinnamon. Guanacos have grey faces and small, straight ears, the name guanaco comes from the South American Quechua word huanaco. The guanaco is a native to the mountainous regions of South America. They are found in the altiplano of Peru, Bolivia and Chile, in Argentina and Chile, they are more numerous in Patagonian regions, as well as in places such as the Torres del Paine National Park, and Isla Grande de Tierra del Fuego. In these areas, they have more robust populations, since grazing competition from livestock is limited, estimates, as of 2011, place their numbers at 400,000 to 600,000. A small introduced population exists on Staats Island in the Falkland Islands, guanacos live in herds composed of females, their young, and a dominant male. While reproductive groups tend to remain small, often containing no more than 10 adults, when they feel threatened, guanacos alert the herd to flee with a high-pitched, bleating call. The male usually runs behind the herd to defend them and they can run at 56 km per hour, often over steep and rocky terrain. A guanacos typical lifespan is 20 to 25 years, guanacos are one of the largest wild mammal species found in South America. Natural predators include cougars, jaguars, and foxes, the guanaco has thicker skin on its neck, a trait also found in its domestic counterpart, the llama and in its relatives, the wild vicuña and domesticated alpaca. This protects its neck from predator attacks, bolivians use the neck-skin of these animals to make shoes, flattening and pounding the skin to be used for the soles. In Chile, hunting is allowed only in Tierra del Fuego, between 2007 and 2012,13,200 guanacos were legally hunted in Tierra del Fuego. Mating season occurs between November and February, during which males often fight violently to establish dominance and breeding rights, eleven-and-a-half months later, a single chulengo is born. Chulengos are able to immediately after birth. Male chulengos are chased off from the herd by the dominant male around one year of age, although the species is still considered wild, around 300 guanacos are in US zoos and around 200 are registered in private herds. Guanacos are the parent species of the domesticated llama, guanacos are often found at high altitudes, up to 4,000 meters above sea level, except in Patagonia, where the southerly latitude means ice covers the vegetation at these altitudes. For guanacos to survive in the low oxygen levels found at high altitudes
8.
Rhea (bird)
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The rheas /ˈriː. ə/ are large ratites in the order Rheiformes, native to South America, related to the ostrich and emu. There were formerly two, but now three recognized extant species, the greater or American rhea, the lesser or Darwins rhea, the genus name was given in 1752 by Paul Möhring and adopted as the English common name. Möhring named the rhea based on the Greek Titan Rhea, whose name is derived from the Greek Rhea from έρα ground and this was fitting, the rhea being a flightless ground bird. Depending on the South American region, the rhea is known locally as ñandú guazu, ema, suri, nandu is the common name in many European languages. R. a. intermedia Rothschild & Chubb 1914, intermediate rhea of southeastern Brazil in Rio Grande do Sul, R. a. nobilis Brodkorb 1939, eastern Paraguay, east of Rio Paraguay. R. a. araneipes Brodkorb 1938, chaco of Paraguay to Bolivia, R. a. albescens Lynch & Holmberg 1878, plains of Argentina south of Rio Negro. Darwins rhea or lesser rhea Rhea pennata dOrbigny 1834 R. p. garleppi, puna/Garlepps rhea of southeastern Peru, southwestern Bolivia and it is lumped into R. tarapacensis by the IUCN. R. p. tarapacensis, Tarapacá Rhea of northern Chile from Atacama to Tarapacá, regarded as a separate third species by the IUCN. R. p. pennata dOrbigny 1834, Darwins lesser rhea of Patagonian steppes in southern Argentina, Rhea pennata was not always in the genus Rhea. In 2008, the SACC, the last holdout, approved the merging of the genera, Rhea and this merging of genera leaves only the genus Rhea. A former third species of rhea, Rhea nana, was described by Lydekker in 1894 based on an egg found in Patagonia. Rheas are large, flightless birds with grey-brown plumage, long legs and long necks, similar to an ostrich. Large males of R. americana can reach 170 cm tall at the head,100 cm at the back and can weigh up to 40 kg and their wings are large for a flightless bird and are spread while running, to act like sails. Unlike most birds, rheas have only three toes and their tarsus has 18 to 22 horizontal plates on the front of it. They also store urine separately in an expansion of the cloaca, rheas are from South America only and are limited within the continent to Argentina, Bolivia, Brazil, Chile, Paraguay, Peru, and Uruguay. They are grassland birds and both species prefer open land, the greater rheas live in open grasslands, pampas, and chaco woodlands. They prefer to breed near water and prefer lowlands, seldom going above 1,500 metres, on the other hand, the lesser rhea will inhabit most shrubland, grassland, even desert salt puna up to 4,500 metres. A small population of rheas has emerged in northeastern Germany, after several couples escaped from an exotic meat farm near Lübeck in the late 1990s, contrary to expectations, the large birds have adapted well to the conditions in the German countryside
9.
Felidae
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Felidae is the family of cats. A member of family is also called a felid. They are sometimes referred to as hypercarnivores because of the large proportion of protein they require in their diet. Of the 13 terrestrial families in the order Carnivora, they are the strictest carnivores, the first cats emerged during the Oligocene, about 25 million years ago. In prehistoric times, there was a subfamily, the Machairodontinae. Other superficially cat-like mammals, such as the metatherians Thylacosmilus and Thylacoleo, the 42 known cat species in the world today are all descended from a common ancestor. Cats originated in Asia and spread across continents by crossing land bridges, about 60% of the modern cat species are estimated to have developed within the last million years. Felidaes closest relatives are thought to be the Asiatic linsangs, together with the Viverridae, hyenas, mongooses, and Madagascar carnivores, they form the suborder Feliformia. Most cat species share a genetic anomaly that prevents them from tasting sweetness, most cat species have a haploid number of 18 or 19. New World cats have a number of 18, possibly due to the combination of two smaller chromosomes into a larger one. Domestic cats may either have a long or short tail, at one point, biologists had to consider whether the short tail also found in the lynx was the ancestral or derived trait. Without looking at the record, researchers were able to look at the character states found in their outgroups. Because all animals belonging to Felidae’s sister taxa, Viverridae, have long tails, some domestic cats display a rosette pattern on their coats. This character state, however, is not related to the rosettes found on big cats, domestic cats and big cats underwent convergent evolution for this trait. The most common ancestor to all cats had a flecked coat, the jaguarundi lost this character state secondarily. The most common recent ancestor of snow leopards, tigers, jaguars, lions, tigers and lions, however, do not display rosettes as adults. They both have lost this character state over time. Adult tigers actually display elongated rosettes that now appear as stripes, adult lions seem to lack any distinctive markings altogether
10.
Geometry
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Geometry is a branch of mathematics concerned with questions of shape, size, relative position of figures, and the properties of space. A mathematician who works in the field of geometry is called a geometer, Geometry arose independently in a number of early cultures as a practical way for dealing with lengths, areas, and volumes. Geometry began to see elements of mathematical science emerging in the West as early as the 6th century BC. By the 3rd century BC, geometry was put into a form by Euclid, whose treatment, Euclids Elements. Geometry arose independently in India, with texts providing rules for geometric constructions appearing as early as the 3rd century BC, islamic scientists preserved Greek ideas and expanded on them during the Middle Ages. By the early 17th century, geometry had been put on a solid footing by mathematicians such as René Descartes. Since then, and into modern times, geometry has expanded into non-Euclidean geometry and manifolds, while geometry has evolved significantly throughout the years, there are some general concepts that are more or less fundamental to geometry. These include the concepts of points, lines, planes, surfaces, angles, contemporary geometry has many subfields, Euclidean geometry is geometry in its classical sense. The mandatory educational curriculum of the majority of nations includes the study of points, lines, planes, angles, triangles, congruence, similarity, solid figures, circles, Euclidean geometry also has applications in computer science, crystallography, and various branches of modern mathematics. Differential geometry uses techniques of calculus and linear algebra to problems in geometry. It has applications in physics, including in general relativity, topology is the field concerned with the properties of geometric objects that are unchanged by continuous mappings. In practice, this often means dealing with large-scale properties of spaces, convex geometry investigates convex shapes in the Euclidean space and its more abstract analogues, often using techniques of real analysis. It has close connections to convex analysis, optimization and functional analysis, algebraic geometry studies geometry through the use of multivariate polynomials and other algebraic techniques. It has applications in areas, including cryptography and string theory. Discrete geometry is concerned mainly with questions of relative position of simple objects, such as points. It shares many methods and principles with combinatorics, Geometry has applications to many fields, including art, architecture, physics, as well as to other branches of mathematics. The earliest recorded beginnings of geometry can be traced to ancient Mesopotamia, the earliest known texts on geometry are the Egyptian Rhind Papyrus and Moscow Papyrus, the Babylonian clay tablets such as Plimpton 322. For example, the Moscow Papyrus gives a formula for calculating the volume of a truncated pyramid, later clay tablets demonstrate that Babylonian astronomers implemented trapezoid procedures for computing Jupiters position and motion within time-velocity space
11.
Hunting
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Hunting is the practice of killing or trapping animals, or pursuing or tracking them with the intent of doing so. Hunting wildlife or feral animals is most commonly done by humans for food, recreation, to predators that are dangerous to humans or domestic animals. Lawful hunting is distinguished from poaching, which is the killing, trapping or capture of the hunted species. The species that are hunted are referred to as game or prey and are usually mammals, Hunting can also be a means of pest control. However, hunting has also contributed to the endangerment, extirpation and extinction of many animals. The pursuit, capture and release, or capture for food of fish is called fishing, the practice of foraging or gathering materials from plants and mushrooms is also considered separate from hunting. The word hunt serves as both a noun and a verb, the noun has been dated to the early 12th century, act of chasing game, from the verb hunt. The meaning of a body of persons associated for the purpose of hunting with a pack of hounds is first recorded in the 1570s, meaning the act of searching for someone or something is from about 1600. The verb, Old English huntian to chase game, perhaps developed from hunta hunter, is related to hentan to seize, from Proto-Germanic huntojan, the general sense of search diligently is first recorded c. Hunting has a history and may well pre-date the rise of the species Homo sapiens. Evidence from western Kenya suggests that hunting has been occurring for more two million years. Furthermore, evidence exists that hunting may have one of the multiple environmental factors leading to the Holocene extinction of megafauna. North American megafauna extinction was coincidental with the Younger Dryas impact event, however, in other locations such as Australia, humans are thought to have played a very significant role in the extinction of the Australian megafauna that was widespread prior to human occupation. The closest surviving relatives of the species are the two species of Pan, the common chimpanzee and bonobos. Common chimpanzees have a diet that includes troop hunting behaviour based on beta males being led by an alpha male. Bonobos have also observed to occasionally engage in group hunting. With the establishment of language, culture, and religion, hunting became a theme of stories and myths, as well as such as dance. Hunting was a component of hunter-gatherer societies before the domestication of livestock
12.
Realism (arts)
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Realism in the arts is the attempt to represent subject matter truthfully, without artificiality and avoiding artistic conventions, implausible, exotic and supernatural elements. Realism has been prevalent in the arts at many periods, and is in part a matter of technique and training. In the visual arts, illusionistic realism is the depiction of lifeforms, perspective. Realist works of art may emphasize the mundane, ugly or sordid, such as works of realism, regionalism. There have been various movements in the arts, such as the opera style of verismo, literary realism, theatrical realism. The realism art movement in painting began in France in the 1850s, the realist painters rejected Romanticism, which had come to dominate French literature and art, with roots in the late 18th century. Realism is the precise, detailed and accurate representation in art of the appearance of scenes. Realism in this sense is also called naturalism, mimesis or illusionism, realistic art was created in many periods, and it is in large part a matter of technique and training, and the avoidance of stylization. It becomes especially marked in European painting in the Early Netherlandish painting of Jan van Eyck, however such realism is often used to depict, for example, angels with wings, which were not things the artists had ever seen in real life. It is the choice and treatment of matter that defines Realism as a movement in painting. The development of increasingly accurate representation of the appearances of things has a long history in art. It includes elements such as the depiction of the anatomy of humans and animals, of perspective and effects of distance. Ancient Greek art is recognised as having made great progress in the representation of anatomy. Pliny the Elders famous story of birds pecking at grapes painted by Zeuxis in the 5th century BC may well be a legend, roman portraiture, when not under too much Greek influence, shows a greater commitment to a truthful depiction of its subjects. The art of Late Antiquity famously rejected illusionism for expressive force, scientific methods of representing perspective were developed in Italy and gradually spread across Europe, and accuracy in anatomy rediscovered under the influence of classical art. As in classical times, idealism remained the norm, intriguingly, having led the development of illusionic painting, still life was to be equally significant in its abandonment in Cubism. The depiction of ordinary, everyday subjects in art also has a history, though it was often squeezed into the edges of compositions. However these objects are at least largely there because they carry layers of complex significance, pieter Bruegel the Elder pioneered large panoramic scenes of peasant life
