Geography (from Greek: γεωγραφία, geographia. Combination of Greek words 'Geo' (The Earth) and 'Graphien' (to describe), literally "earth description") is a field of science devoted to the study of the lands, features, inhabitants, and phenomena of Earth. Geography is an all-encompassing discipline that seeks an understanding of Earth and its human and natural complexities—not merely where objects are, but also how they have changed and come to be. While geography is specific to Earth, many concepts can be applied more broadly to other celestial bodies in the field of planetary science. Geography has been called "a bridge between natural science and social science disciplines."
The first recorded use of the word γεωγραφία was as a title of a book by Greek scholar Eratosthenes (276–194 BC). However, the concepts of geography (such as cartography) date back to the earliest attempts to understand the world spatially, with the earliest example of an attempted world map dating to the 9th century BCE in ancient Babylon. The history of geography as a discipline spans cultures and millennia, being independently developed by multiple groups, and cross-pollinated by trade between these groups. The core concepts of geography consistent between all approaches are a focus on space, place, time, and scale.
Today, geography is an extremely broad discipline with multiple approaches and modalities. There have been multiple attempts to organize the discipline, including the four traditions of geography, and into branches. Techniques employed can generally be broken down into quantitative and qualitative approaches, with many studies taking mixed-methods approaches. Common techniques include cartography, remote sensing, interviews, and surveys. (Full article...)
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A satellite image of the lower Florida peninsula showing darkened portions south of Lake Okeechobee as the Everglades and Big Cypress Swamp. The reddish area bordering the large inland lake is the Everglades Agricultural Area. Before drainage, the Everglades, a region of tropicalwetlands in southern Florida, were an interwoven mesh of marshes and prairies covering 4,000 square miles (10,000km2). The Everglades is both a vast watershed that has historically extended from Lake Okeechobee 100 miles (160km) south to Florida Bay (around one-third of the southern Florida peninsula), and many interconnected ecosystems within a geographic boundary. It is such a unique meeting of water, land, and climate that the use of either singular or plural to refer to the Everglades is appropriate. When Marjory Stoneman Douglas wrote her definitive description of the region in 1947, she used the metaphor "River of Grass" to explain the blending of water and plant life.
Although sawgrass and sloughs are the enduring geographical icons of the Everglades, other ecosystems are just as vital, and the borders marking them are subtle or nonexistent. Pinelands and tropical hardwood hammocks are located throughout the sloughs; the trees, rooted in soil inches above the peat, marl, or water, support a variety of wildlife. The oldest and tallest trees are cypresses, whose roots are specially adapted to grow underwater for months at a time. The Big Cypress Swamp is well known for its 500-year-old cypresses, though cypress domes can appear throughout the Everglades. As the freshwater from Lake Okeechobee makes its way to Florida Bay, it meets saltwater from the Gulf of Mexico; mangrove forests grow in this transitional zone, providing nursery and nesting conditions for many species of birds, fish, and invertebrates. The marine environment of Florida Bay is also considered part of the Everglades because its seagrasses and aquatic life are attracted to the constant discharge of freshwater. (Full article...)
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Portrait of Friedrich Wilhelm von Seydlitz, by Adolph Menzel, 1854
Seydlitz became legendary throughout the Prussian Army both for his leadership and for his reckless courage. During the Seven Years' War, he came into his own as a cavalry general, known for his coup d'œil, his ability to assess at a glance the entire battlefield situation and to understand intuitively what needed to be done: he excelled at converting the King's directives into flexible tactics. At the Battle of Rossbach, his cavalry was instrumental in routing the French and Imperial armies. His cavalry subsequently played an important role in crushing the Habsburg and Imperial left flank at the Battle of Leuthen. Seydlitz was wounded in battle several times. After the Battle of Kunersdorf in August 1759, he semi-retired to recover from his wounds, charged with the protection of the city of Berlin. He was not healthy enough to campaign again until 1761. (Full article...)
Ubinas is an active stratovolcano in the Moquegua Region of southern Peru, approximately 60 kilometres (37mi) east of the city of Arequipa. Part of the Central Volcanic Zone of the Andes, it rises 5,672 metres (18,609ft) above sea level. The volcano's summit is cut by a 1.4-kilometre-wide (0.87mi) and 150-metre-deep (490ft) caldera, which itself contains a smaller crater. Below the summit, Ubinas has the shape of an upwards-steepening cone with a prominent notch on the southern side. The gently sloping lower part of the volcano is also known as Ubinas I and the steeper upper part as Ubinas II; they represent different stages in the volcano's geological history.
The most active volcano in Peru, Ubinas has a history of small to moderate explosive eruptions as well as a few larger eruptions, such as in 1667, along with persistent degassing and ash emissions. Activity at the volcano began in the Pleistocene epoch, and led to the growth of the current mountain in two phases. Among the recent eruptions was the 2006–2007 event, which produced eruption columns and led to ash fall in the region, resulting in health issues and evacuations. During the most recent activity, from 2013 to 2017, a lava flow formed inside the crater, and further ash falls led to renewed evacuations of surrounding towns. Ubinas is monitored by the Peruvian geological service INGEMMET, which has published a volcano hazard map for Ubinas and regular volcanic activity reports. (Full article...)
Tehlirian came from Erzindjan in the Ottoman Empire but moved to Serbia before the war. He served in the Armenian volunteer units of the Russian army and lost most of his family in the genocide. Deciding to take revenge, he assassinated Harutiun Mgrditichian, who helped the Ottoman secret police, in Constantinople. Tehlirian joined Operation Nemesis, a clandestine program carried out by the Dashnaktsutyun (the Armenian Revolutionary Federation); he was chosen for the mission to assassinate Talaat due to his previous success. Talaat had already been convicted and sentenced to death by an Ottoman court-martial, but was living in Berlin with the permission of the Government of Germany. Many prominent Germans attended Talaat's funeral; the German Foreign Office sent a wreath saying, "To a great statesman and a faithful friend." (Full article...)
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17th- or 18th-century Hajj certificate showing the Kaaba within the Masjid al-Haram
Hajj: Journey to the Heart of Islam was an exhibition held at the British Museum in London from 26 January to 15 April 2012. It was the world's first major exhibition telling the story, visually and textually, of the hajj–the pilgrimage to Mecca which is one of the five pillars of Islam. Textiles, manuscripts, historical documents, photographs, and art works from many different countries and eras were displayed to illustrate the themes of travel to Mecca, hajj rituals, and the Kaaba. More than two hundred objects were included, drawn from forty public and private collections in a total of fourteen countries. The largest contributor was David Khalili's family trust, which lent many objects that would later be part of the Khalili Collection of Hajj and the Arts of Pilgrimage.
Ricketts Glen's land was once home to Native Americans. From 1822 to 1827, a turnpike was built along the course of PA 487 in what is now the park, where two squatters harvested cherry trees to make bed frames from about 1830 to 1860. The park's waterfalls were one of the main attractions for a hotel from 1873 to 1903; the park is named for the hotel's proprietor, R. Bruce Ricketts, who built the trail along the waterfalls. By the 1890s Ricketts owned or controlled over 80,000 acres (320km2; 120sqmi) and made his fortune clearcutting almost all of that land, including much of what is now the park; however he preserved about 2,000 acres (810ha) of virgin forest in the creek's three glens. The sawmill was at the village of Ricketts, which was mostly north of the park. After his death in 1918, Ricketts' heirs began selling land to the state for Pennsylvania State Game Lands. (Full article...)
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Screenshot of gameplay (1977 version)
Colossal Cave Adventure (also known as Adventure or ADVENT) is a text-based adventure game, released in 1976 by developer Will Crowther for the PDP-10mainframe computer. It was expanded upon in 1977 by Don Woods. In the game, the player explores a cave system rumored to be filled with treasure and gold. The game is composed of dozens of locations, and the player moves between these locations and interacts with objects in them by typing one- or two-word commands which are interpreted by the game's natural language input system. The program acts as a narrator, describing the player's location and the results of the player's attempted actions. It is the first well-known example of interactive fiction, as well as the first well-known adventure game, for which it was also the namesake.
The original game, written in 1975 and 1976, was based on Crowther's maps and experiences caving in Mammoth Cave in Kentucky, the longest cave system in the world; further, it was intended, in part, to be accessible to non-technical players, such as his two daughters. Woods's version expanded the game in size and increased the number of fantasy elements present in it, such as a dragon and magic spells. Both versions, typically played over teleprinters connected to mainframe computers, were spread around the nascent ARPANET, the precursor to the Internet, which Crowther was involved in developing. (Full article...)
Within the boundaries of the historic county of Cheshire, Altrincham was established as a market town in 1290, a time when the economy of most communities was based on agriculture rather than trade, and there is still a market in the town. Further socioeconomic development came with the extension of the Bridgewater Canal to Altrincham in 1765 and the arrival of the railway in 1849, stimulating industrial activity in the town. Outlying villages were absorbed by Altrincham's subsequent growth, along with the grounds of Dunham Massey Hall, formerly the home of the Earl of Stamford, and now a tourist attraction with three Grade I Listed Buildings and a deer park. (Full article...)
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The volcano-caldera complex in the north of Lombok
In 1257, a catastrophic eruption occurred at the Samalas volcano on the Indonesian island of Lombok. The event had a probable Volcanic Explosivity Index of 7, making it one of the largest volcanic eruptions during the Holocene epoch. It left behind a large caldera that contains Lake Segara Anak. Later volcanic activity created more volcanic centres in the caldera, including the Barujari cone, which remains active.
The event created eruption columns reaching tens of kilometres into the atmosphere and pyroclastic flows that buried much of Lombok and crossed the sea to reach the neighbouring island of Sumbawa. The flows destroyed human habitations, including the city of Pamatan, which was the capital of a kingdom on Lombok. Ash from the eruption fell as far as 340 kilometres (210mi) away in Java; the volcano deposited more than 10 cubic kilometres (2.4cumi) of rocks and ash. (Full article...)
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A stamp of Zhang Heng issued by China Post in 1955
Zhang Heng began his career as a minor civil servant in Nanyang. Eventually, he became Chief Astronomer, Prefect of the Majors for Official Carriages, and then Palace Attendant at the imperial court. His uncompromising stance on historical and calendrical issues led to his becoming a controversial figure, preventing him from rising to the status of Grand Historian. His political rivalry with the palace eunuchs during the reign of Emperor Shun (r.125–144) led to his decision to retire from the central court to serve as an administrator of Hejian Kingdom in present-day Hebei. Zhang returned home to Nanyang for a short time, before being recalled to serve in the capital once more in 138. He died there a year later, in 139. (Full article...)
Alien vs. Predator was theatrically released on 12 August 2004. It received generally negative reviews and grossed $177.4 million worldwide against a production budget of $60–70 million. A direct sequel, Aliens vs. Predator: Requiem, was released in 2007. (Full article...)
Expedition leader Douglas Mawson had planned to use the Vickers R.E.P. Type Monoplane as a reconnaissance and search and rescue tool, and to assist in publicity, but the aircraft crashed heavily during a test flight in Adelaide, only two months before Mawson's scheduled departure date. The plane was nevertheless sent south with the expedition, after having been stripped of its wings and metal sheathing from the fuselage. (Full article...)
Controversy exists over the Falklands' discovery and subsequent colonisation by Europeans. At various times, the islands have had French, British, Spanish, and Argentine settlements. Britain reasserted its rule in 1833, but Argentina maintains its claim to the islands. In April 1982, Argentine military forces invaded the islands. British administration was restored two months later at the end of the Falklands War. In a 2013 sovereignty referendum, almost all Falklanders voted in favour of remaining a UK overseas territory. The territory's sovereignty status is part of an ongoing dispute between Argentina and the UK. (Full article...)
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Chetco River near Boulder Creek
The Chetco River is a 56-mile-long (90km) stream located in the southwestern portion of the U.S. state of Oregon. It drains approximately 352 square miles (912km2) of Curry County. Flowing through a rugged and isolated coastal region, it descends rapidly from about 3,200 feet (975m) to sea level at the Pacific Ocean. Except for the lowermost 5 miles (8km), the river is located entirely within the Rogue River – Siskiyou National Forest. The river rises in the Kalmiopsis Wilderness, northwest of Chetco Peak at the junction of the Oregon Coast Range and the Klamath Mountains. It flows generally north, west, and then southwest, before emptying into the ocean between Brookings and Harbor, approximately 6 miles (10km) north of the California state line. The Chetco River's watershed remains largely undeveloped, protected by the Rogue River – Siskiyou National Forest and the Kalmiopsis Wilderness. The upper 45 miles (72km) of the river have been designated Wild and Scenic since 1988.
Native Americans have lived in the Chetco River's watershed for the last one to three thousand years. Several explorers, including Sir Francis Drake, George Vancouver, and Jedediah Smith, visited the region between the 16th and 19thcenturies, and found the Chetco people inhabiting the area. Non-indigenous settlers arrived soon after gold and other precious metals were discovered in the 1840s and 1850s. The town of Brookings was founded in the early 20th century, and incorporated in 1951. Fourteen thousand residents of Brookings and Harbor rely on the Chetco for drinking water. (Full article...)
A c. 1650 map showing the Island of California, a long-held European misconception, dating from the 16th century, that California was not part of mainland North America but rather a large island separated from the continent by a strait now known instead as the Gulf of California. The belief persisted until the expeditions of Juan Bautista de Anza in 1774–76.
The Robinson projection is a projection of a world map showing the entire Earth at once. It was specifically created in an attempt to find a good compromise to the problem of showing the whole globe as a single flat image. The projection was devised by Arthur H. Robinson in 1963; distortion is severe close to the poles, but quickly declines to moderate levels as latitudes decrease. This Robinson-projection map, with standard parallels of 38°N and 38°S, was produced by the United States Central Intelligence Agency and shows the world as of February2016.
A composite satellite image of the geography of Africa, the Earth's second-largest continent, and its adjacent islands. Separated from Europe by the Mediterranean Sea and from much of Asia by the Red Sea, Africa is joined to Asia at its northeast extremity by the Isthmus of Suez. For geopolitical purposes, the Sinai Peninsula– east of the Suez Canal– is often considered part of Africa, although geographically it belongs in Asia. Africa can be divided into a number of geographic zones: The Atlas Mountains in the north, the Sahara, the coastal plains, and the inner plateaus.
The azimuthal equidistant projection is an azimuthalmap projection in which all points on the map are both proportionately correct distances from the center point and at the correct azimuth (direction) from the center point. Distances and directions to all places, however, are true only from the center point of projection. This projection has been used for the flag of the United Nations, for the USGSNational Atlas of the United States of America, and for large-scale mapping of Micronesia, among others.
A portolan chart from 1492, the oldest known signed and dated chart of Portuguese origin. Cartography technologies greatly advanced during the Age of Discovery. Iberian mapmakers in particular focused on practical charts to use as navigational aids. Unlike Spanish maps which were regarded as state secrets, Portuguese ones were used by other countries, and Portuguese cartographers drew upon the skill and knowledge of other cultures as well.
The Catalan Atlas is a medieval map in the Catalan language, created in 1375. Described as "the zenith of medieval map-work", it is the earliest known chart to use a compass rose. It was produced by the Majorcan cartographic school and is attributed to Abraham Cresques, a Jewish book illuminator described by a contemporary as a master of mappae mundi. It has been in the royal library of France (now the Bibliothèque nationale de France) since the time of King CharlesV. The atlas originally consisted of six vellum leaves, each about 64.5 by 50cm (25.4 by 19.7in), folded vertically and painted in various colours including gold and silver. This picture is a montage of eight pages (four leaves) of the atlas, depicting Europe, northern Africa and Asia.
A satellite image of the Scandinavian Peninsula in winter. The peninsula, approximately 1,850 kilometers (1,150 miles) long with a width varying between approximately 370–805km (230–500mi), making it the largest in Europe, is located in the northern part of the continent and consists of Norway, Sweden and part of Finland. Much of the population is concentrated in the southern part of the peninsula; Stockholm and Gothenburg, both in Sweden, and Oslo in Norway are the largest cities.
Antarctica, the continent surrounding the Earth's South Pole, is the coldest place on earth and is almost entirely covered by ice. Antarctica was discovered in late January 1820. Too cold and dry to support virtually any vascular plants, Antartica's flora presently consists of around 250 lichens, 100 mosses, 25-30 liverworts, and around 700 terrestrial and aquatic algal species.
The sinusoidal projection is a pseudocylindrical equal-areamap projection. Used as early as the 16th century, this projection shows distances accurately along the central meridian and the equator; areas furthest from these lines are the most distorted.
Photograph: Maull & Fox; restoration: Adam Cuerden
Fanny Bullock Workman (1859–1925) was an American geographer, cartographer, explorer, travel writer, and mountaineer. Together with her husband, William Hunter Workman, she traveled by bicycle through Switzerland, France, Italy, Spain, Algeria and India; after taking up climbing in the Himalayas, she set a women's altitude record on Pinnacle Peak, reaching 23,000 feet (7,000m). She published eight travel books, with particular focus on the lives of women in the countries she visited, and championed women's rights and women's suffrage.
Wallace did extensive fieldwork, starting in the Amazon River basin. He then did fieldwork in the Malay Archipelago, where he identified the faunal divide now termed the Wallace Line, which separates the Indonesian archipelago into two distinct parts: a western portion in which the animals are largely of Asian origin, and an eastern portion where the fauna reflect Australasia. He was considered the 19th century's leading expert on the geographical distribution of animal species, and is sometimes called the "father of biogeography", or more specifically of zoogeography. (Full article...)
A map of the United States showing its 50 states, federal district and five inhabited territories. Alaska, Hawaii, and the territories are shown at different scales, and the Aleutian Islands and the uninhabitednorthwestern Hawaiian Islands are omitted from this map. The United States of America is a federal republic consisting of 50 states, a federal district (Washington, D.C., the capital city of the United States), five major territories, and various minor islands. Both the states and the United States as a whole are each sovereign jurisdictions. The Tenth Amendment to the United States Constitution allows states to exercise all powers of government not delegated to the federal government. Each state has its own constitution and government, and all states and their residents are represented in the federal Congress, a bicameral legislature consisting of the Senate and the House of Representatives. Each state is represented by two senators, while representatives are distributed among the states in proportion to the most recent constitutionally mandated decennial census. Additionally, each state is entitled to select a number of electors to vote in the Electoral College, the body that elects the president of the United States, equal to the total of representatives and senators in Congress from that state. The federal district does not have representatives in the Senate, but has a non-voting delegate in the House, and it is also entitled to electors in the Electoral College. Congress can admit more states, but it cannot create a new state from territory of an existing state or merge two or more states into one without the consent of all states involved, and each new state is admitted on an equal footing with the existing states. (Full article...)
Generation Z (often shortened to Gen Z), colloquially known as zoomers, is the demographiccohort succeeding Millennials and preceding Generation Alpha. Researchers and popular media use the mid-to-late 1990s as starting birth years and the early 2010s as ending birth years. Most members of Generation Z are children of Generation X or younger Baby Boomers. The older members may be the parents of the younger members of Generation Alpha. (Full article...)
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Cartogram of the world's population in 2018; each square represents 500,000 people.
Millennials, also known as Generation Y or Gen Y, are the demographic cohort following Generation X and preceding Generation Z. Researchers and popular media use the early 1980s as starting birth years and the mid-1990s to early 2000s as ending birth years, with the generation typically being defined as people born from 1981 to 1996. Most millennials are the children of baby boomers and older Generation X. In turn millennials are often the parents of Generation Alpha. (Full article...)