Geography (from Ancient Greekγεωγραφίαgeōgraphía; combining gê 'Earth' and gráphō 'write') is 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."
Origins of many of the concepts in geography can be traced to Greek Eratosthenes of Cyrene, who may have coined the term "geographia" (c. 276 BC – c. 195/194 BC). The first recorded use of the word γεωγραφία was as the title of a book by Greek scholar Claudius Ptolemy (100 – 170 AD). This work created the so-called "Ptolemaic tradition" of geography, which included "Ptolemaic cartographic theory." 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 surveying. (Full article...)
The St. Johns River (Spanish: Río San Juan) is the longest river in the U.S. state of Florida and it is the most significant one for commercial and recreational use. At 310 miles (500 km) long, it flows north and winds through or borders twelve counties. The drop in elevation from headwaters to mouth is less than 30 feet (9 m); like most Florida waterways, the St. Johns has a very slow flow speed of 0.3 mph (0.13 m/s), and is often described as "lazy".
Numerous lakes are formed by the river or flow into it, but as a river its widest point is nearly 3 miles (5 km) across. The narrowest point is in the headwaters, an unnavigable marsh in Indian River County. The St. Johns drainage basin of 8,840 square miles (22,900 km2) includes some of Florida's major wetlands. It is separated into three major basins and two associated watersheds for Lake George and the Ocklawaha River, all managed by the St. Johns River Water Management District. (Full article...)
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Looking south across the reserve, with reed beds in the foreground
The Ham Wall reserve was constructed originally to provide reed bed habitat for the Eurasian bittern, which at the time was at a very low population level in the UK. The site is divided into several sections with independently controllable water levels, and machinery and cattle are used to maintain the quality of the reed beds. There are important breeding populations of wetland birds including the rare little bittern and great white egret, and the area hosts several other uncommon animals and plants. The RSPB works with other organisations as part of the Avalon Marshes Partnership to coordinate conservation issues across the Somerset Levels. (Full article...)
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Extent of Ali Bey and Zahir's territory between 1768 and 1774 and Russian naval movements in the Levant, based on the accounts of Sauveur Lusignan, a contemporary historian Beirut was twice occupied during the Russo-Turkish War of 1768–1774 by squadrons of the Imperial Russian Navy's Mediterranean Fleet, first in June 1772 and second from October 1773 to early 1774, as part of its Levant campaign. Russia's main objective in this campaign was to assist local forces led by Egypt's autonomous ruler, Ali Bey al-Kabir, who was in open rebellion against the Ottoman Empire.
Russia, led by Catherine the Great, was pressing the Ottomans in Europe. Ali took advantage of the Empire's preoccupation with Russia to declare Egypt's independence; in 1771 he sent an army led by Muhammad Bey Abu al-Dhahab to occupy Ottoman territory in the Levant. Abu al-Dhahab unexpectedly returned to challenge Ali for control of Egypt. Ali requested Russian military assistance against both his rival and the Ottomans. When this aid, in the form of a small Russian squadron, arrived in the region, Ali had already fled Egypt and taken refuge in Acre, the power base of his ally, Zahir al-Umar. After helping repel an Ottoman offensive on Sidon, the Russian squadron sailed for Beirut. They bombarded the town in June 1772 and occupied it from June23 to 28. (Full article...)
Evidence of Stone Age, Roman and Anglo-Saxon activity has previously been discovered locally. In the Middle Ages, Sale was a rural township, linked ecclesiastically with neighbouring Ashton upon Mersey, whose fields and meadows were used for crop and cattle farming. By the 17th century, Sale had a cottage industry manufacturing garthweb, the woven material from which horses' saddle girths were made. (Full article...)
The Columbia Slough is a narrow waterway, about 19 miles (31 km) long, in the floodplain of the Columbia River in the U.S. state of Oregon. From its source in the Portland suburb of Fairview, the Columbia Slough meanders west through Gresham and Portland to the Willamette River, about 1 mile (1.6 km) from the Willamette's confluence with the Columbia. It is a remnant of the historic wetlands between the mouths of the Sandy River to the east and the Willamette River to the west. Levees surround much of the main slough as well as many side sloughs, detached sloughs, and nearby lakes. Drainage district employees control water flows with pumps and floodgates. Tidal fluctuations cause reverse flow on the lower slough.
The Columbia floodplain, formed by geologic processes including lava flows, volcanic eruptions, and the Missoula Floods, is part of the Portland Basin, which extends across the Columbia River from Multnomah County, Oregon, into Clark County, Washington. Five percent of Oregon's population, about 158,000 people, live in the slough watershed of about 51 square miles (130 km2). Municipal wells near the upper slough provide supplemental drinking water to Portland and nearby cities. The cities, the drainage districts, the county, and a regional government, Metro, have overlapping jurisdictions in the watershed. A regional agency operates Portland International Airport along the middle slough and marine terminals near the lower slough. The Oregon Department of Environmental Quality (DEQ) and the city's Bureau of Environmental Services (BES) deal with environmental issues. (Full article...)
Averaging about 5,400 feet (1,600 m) in elevation, the park has a dry windy climate with temperatures that vary from summer highs of about 100 °F (38 °C) to winter lows well below freezing. More than 400 species of plants, dominated by grasses such as bunchgrass, blue grama, and sacaton, are found in the park. Fauna include larger animals such as pronghorns, coyotes, and bobcats; many smaller animals, such as deer mice, snakes, lizards, and seven kinds of amphibians; and more than 200 species of birds, some of which are permanent residents and many of which are migratory. About one third of the park is designated wilderness—50,260 acres (79 sq mi; 203 km2). (Full article...)
The town owes its existence mainly to two ore bodies that formed about 1.75billion years ago along a ring fault in the caldera of an undersea volcano. Tectonic plate movements, plate collisions, uplift, deposition, erosion, and other geologic processes eventually exposed the tip of one of the ore bodies and pushed the other close to the surface, both near Jerome. In the late 19th century, the United Verde Mine, developed by William A. Clark, extracted ore bearing copper, gold, silver, and other metals from the larger of the two. The United Verde Extension UVX Mine, owned by James Douglas Jr., depended on the other huge deposit. In total, the copper deposits discovered in Jerome's vicinity were among the richest ever found. (Full article...)
He and four companions attained the pole on 17 January 1912, where they found that a Norwegian team led by Roald Amundsen had preceded them by 34 days. Scott's party of five died on the return journey from the pole; some of their bodies, journals, and photographs were found by a search party eight months later. The expedition, named after its supply ship, was a private venture financed by public contributions and a government grant. It had further backing from the Admiralty, which released experienced seamen to the expedition, and from the Royal Geographical Society. The expedition's team of scientists carried out a comprehensive scientific programme, while other parties explored Victoria Land and the Western Mountains. An attempted landing and exploration of King Edward VII Land was unsuccessful. A journey to Cape Crozier in June and July 1911 was the first extended sledging journey in the depths of the Antarctic winter. (Full article...)
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Sunset on Ganoga Lake
Ganoga Lake is a natural lake in Colley Township in southeastern Sullivan County in Pennsylvania, United States. Known as Robinson's Lake and Long Pond for most of the 19th century, the lake was purchased by the Ricketts family in the early 1850s and became part of R. Bruce Ricketts' extensive holdings in the area after the American Civil War. The lake is one of the highest in Pennsylvania, which led Ricketts to name it Highland Lake by 1874 and rename it Ganoga Lake in 1881; Pennsylvania senator Charles R. Buckalew suggested the name Ganoga from the Seneca language word for "water on the mountain".
The Ricketts built a stone house on the lake shore by 1852 or 1855; this served as a hunting lodge and tavern. In 1873 a large wooden addition was built north of the stone house, which became a hotel known as the North Mountain House. The hotel had one of the first summer schools in the United States in 1876 and 1877. A branch railroad line to the lake served the hotel and also hauled ice cut from the lake for refrigeration. The hotel closed in 1903, though the house remained the Ricketts family summer home. After the death of R. Bruce Ricketts in 1918, his heirs sold much of his 80,000 acres (32,000 ha) to the state for Pennsylvania State Game Lands and Ricketts Glen State Park. The state tried to purchase the lake in 1957, but was outbid by a group of investors who turned the land around it into a private housing development; as such it is "off limits" to the public. (Full article...)
The polar bear (Ursus maritimus) is a large bear native to the Arctic and nearby areas. It is closely related to the brown bear, and the two species can interbreed. The polar bear is the largest extant species of bear and land carnivore, with adult males weighing 300–800 kg (660–1,760 lb). The species is sexually dimorphic, as adult females are much smaller. The polar bear is white- or yellowish-furred with black skin and a thick layer of fat. It is more slender than the brown bear, with a narrower skull, longer neck and lower shoulder hump. Its teeth are sharper and more adapted to cutting meat. The paws are large and allow the bear to walk on ice and paddle in the water.
Polar bears are both terrestrial and pagophilic (ice-living) and are considered marine mammals because of their dependence on marine ecosystems. They prefer the annual sea ice but live on land when the ice melts in the summer. They are mostly carnivorous and specialized for preying on seals, particularly ringed seals. Such prey is typically taken by ambush; the bear may stalk its prey on the ice or in the water, but also will stay at a breathing hole or ice edge to wait for prey to swim by. The bear primarily feeds on the seal's energy-rich blubber. Other prey include walruses, beluga whales and some terrestrial animals. Polar bears are usually solitary but can be found in groups when on land. During the breeding season, male bears guard females and defend them from rivals. Mothers give birth to cubs in maternity dens during the winter. Young stay with their mother for up to two and a half years. (Full article...)
In October 1915, pack ice in the Weddell Sea had sunk the main expedition ship Endurance, leaving Shackleton and his 27 companions adrift on a floe. They drifted northward until April 1916, when the floe on which they were camped broke up; they made their way in the ship's boats to Elephant Island. Shackleton decided to sail one of the boats with a small crew to South Georgia to seek help. It was not the closest human settlement but the only one that did not require them to sail into the prevailing westerlies. (Full article...)
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Columbia River from Rowena Crest with Interstate 84 on the right
The Columbia and its tributaries have been central to the region's culture and economy for thousands of years. They have been used for transportation since ancient times, linking the region's many cultural groups. The river system hosts many species of anadromous fish, which migrate between freshwater habitats and the saline waters of the Pacific Ocean. These fish—especially the salmon species—provided the core subsistence for native peoples. (Full article...)
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Lithograph of Weissenburg in 1902
SMS Weissenburg was one of the first ocean-going battleships of the Imperial German Navy. She was the third pre-dreadnought of the Brandenburg class, which also included her sister ships Brandenburg, Wörth, and Kurfürst Friedrich Wilhelm. Weissenburg was laid down in 1890 in the AG Vulcan dockyard in Stettin, launched in 1891, and completed in 1894. The Brandenburg-class battleships were unique for their era in that they carried six large-caliber guns in three twin turrets, as opposed to four guns in two turrets, as was the standard in other navies. Weissenburg served with I Division during the first decade of her service with the fleet. This period was generally limited to training exercises and goodwill visits to foreign ports. These training maneuvers were nevertheless very important to developing German naval tactical doctrine in the two decades before World War I, especially under the direction of Alfred von Tirpitz. Weissenburg, along with her three sisters, saw only one major overseas deployment during this period, to China in 1900–1901, during the Boxer Uprising. The ship underwent a major modernization in 1904–1905. (Full article...)
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One of Molyneux's celestial globes, which is displayed in Middle Temple Library – from the frontispiece of the Hakluyt Society's 1889 reprint of A Learned Treatise of Globes, both Cœlestiall and Terrestriall, one of the English editions of Robert Hues' Latin work Tractatus de Globis (1594)
Molyneux was known as a mathematician and maker of mathematical instruments such as compasses and hourglasses. He became acquainted with many prominent men of the day, including the writer Richard Hakluyt and the mathematicians Robert Hues and Edward Wright. He also knew the explorers Thomas Cavendish, Francis Drake, Walter Raleigh and John Davis. Davis probably introduced Molyneux to his own patron, the London merchant William Sanderson, who largely financed the construction of the globes. When completed, the globes were presented to Elizabeth I. Larger globes were acquired by royalty, noblemen and academic institutions, while smaller ones were purchased as practical navigation aids for sailors and students. The globes were the first to be made in such a way that they were unaffected by the humidity at sea, and they came into general use on ships. (Full article...)
Daedongyeojido is a large scale map of Korea produced by Chosun Dynasty cartographer and geologist Kim Jeong-ho in 1861. Considered to mark the zenith of pre-modern Korean cartography, the map consists of 22 separate, foldable booklets, each covering approximately 47 kilometres (29 mi) (north-south) by 31.5 kilometres (19.6 mi) (east-west). Combined, they form a map of Korea that is 6.7 metres (22 ft) wide and 3.8 metres (12 ft) long. Daedongyeojido is praised for precise delineations of mountain ridges, waterways, and transportation routes, as well as its markings for settlements, administrative areas, and cultural sites.
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 370–805 km (230–500 mi), 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.
Illustration of the Ptolemaicgeocentric model of the Universe (the theory that the Earth is the center of the universe) by Portuguese cosmographer and cartographer Bartolomeu Velho. Taken from his treatise Cosmographia, made in Paris, 1568. Notice the distances of the bodies to the centre of the Earth (left) and the times of revolution, in years (right).
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 Kavrayskiy VII projection is a map projection invented by Vladimir V. Kavrayskiy in 1939 as a general purpose pseudocylindrical projection. It produces maps with low overall distortion, despite its straight, evenly-spaced parallels and a simple formulation.
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 compass rose, sometimes called a windrose or rose of the winds, is a figure on a compass, map, nautical chart, or monument used to display the orientation of the cardinal directions (north, east, south, and west) and their intermediate points. It is also the term for the graduated markings found on the traditional magnetic compass. Today, a form of compass rose is found on, or featured in, almost all navigation systems, including nautical charts, non-directional beacons, VHF omnidirectional range systems, GPS, and similar equipment.
Cope had little formal scientific training, and he eschewed a teaching position for field work. He made regular trips to the American West, prospecting in the 1870s and 1880s, often as a member of U.S. Geological Survey teams. A personal feud between Cope and paleontologist Othniel Charles Marsh led to a period of intense fossil-finding competition now known as the Bone Wars. Cope's financial fortunes soured after failed mining ventures in the 1880s, forcing him to sell off much of his fossil collection. He experienced a resurgence in his career toward the end of his life before dying on April 12, 1897. (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 uninhabited northwestern Hawaiian Islands are omitted from the 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 elects 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...)
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Generation Z (often shortened to Gen Z), also 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, with the generation most frequently being defined as people born from 1997 to 2012. Most members of Generation Z are the children of younger baby boomers or Generation X. (Full article...)
Dymaxion map of the world with the 30 largest countries and territories by area This is a list of the world's countries and their dependencies by land, water, and total area, ranked by total area. (Full article...)
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Generation X (often shortened to Gen X) is the demographiccohort following the Baby Boomers and preceding Millennials. Researchers and popular media often use the mid-1960s as its starting birth years and the late 1970s as its ending birth years, with the generation being generally defined as people born from 1965 to 1980. By this definition and U.S. Census data, there are 65.2 million Gen Xers in the United States as of 2019. Most of Generation X are the children of the Silent Generation and early Baby Boomers; Xers are also often the parents of Millennials and Generation Z. (Full article...)
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Daedongyeojido is a large scale map of Korea produced by Chosun Dynasty cartographer and geologist Kim Jeong-ho in 1861. Considered to mark the zenith of pre-modern Korean cartography, the map consists of 22 separate, foldable booklets, each covering approximately 47 kilometres (29 mi) (north-south) by 31.5 kilometres (19.6 mi) (east-west). Combined, they form a map of Korea that is 6.7 metres (22 ft) wide and 3.8 metres (12 ft) long. Daedongyeojido is praised for precise delineations of mountain ridges, waterways, and transportation routes, as well as its markings for settlements, administrative areas, and cultural sites.
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 370–805 km (230–500 mi), 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.
A composite relief satellite image of South America, the fourth-largest continent. South America occupies the southern portion of the landmass in the Western Hemisphere. The continent is generally delimited on the northwest by the Darién watershed along the Colombia–Panama border. Almost all of mainland South America sits on the South American Plate, as do nearby outlying islands.
Photo credit: Joaquim Alves GasparIllustration of the Ptolemaic geocentric model of the Universe (the theory that the Earth is the center of the universe) by Portuguese cosmographer and cartographer Bartolomeu Velho. Taken from his treatise Cosmographia, made in Paris, 1568. Notice the distances of the bodies to the centre of the Earth (left) and the times of revolution, in years (right).
Map: Jorge de AguiarA 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.
Map: Strebe, using GeocartThe Kavrayskiy VII projection is a map projection invented by Vladimir V. Kavrayskiy in 1939 as a general purpose pseudocylindrical projection. It produces maps with low overall distortion, despite its straight, evenly-spaced parallels and a simple formulation.
Map credit: Fernão Vaz DouradoA pre-Mercator nautical chart of West Africa from 1571, by Portuguese cartographer Fernão Vaz Dourado. It is done using the so-called "plane chart model", where observed latitudes and magnetic directions were plotted directly into the plane, with a constant scale, as if the Earth were flat.
Map: Strebe, using GeocartThe Winkel tripel projection is a modified azimuthal map projection proposed by Oswald Winkel in 1921. The arithmetic mean of the equirectangular projection and the Aitoff projection, it was intended as a compromise between minimizing three kinds of distortion: area, direction and distance.
Map: Strebe, using GeocartThe Peirce quincuncial projection is a conformal map projection developed by Charles Sanders Peirce in 1879, while he was working at the U.S. Coast and Geodetic Survey. In the normal aspect Peirce's projection presents the Northern Hemisphere in a square; the Southern Hemisphere is split into four 90°–45°–45° triangles surrounding it so that the whole map forms a larger square.
Map: Strebe, using GeocartThe azimuthal equidistant projection is an azimuthal map 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 USGS National Atlas of the United States of America, and for large-scale mapping of Micronesia, among others.
Map: Strebe, using GeocartThe Eckert II projection is an equal-area pseudocylindrical map projection presented by Max Eckert-Greifendorff in 1906. In the equatorial aspect (where the equator is shown as the horizontal axis) the network of longitude and latitude lines consists solely of straight lines, and the outer boundary has the distinctive shape of an elongated hexagon.
Illustration credit: Joaquim Alves Gaspar, after Jorge de AguiarA compass rose, sometimes called a windrose or rose of the winds, is a figure on a compass, map, nautical chart, or monument used to display the orientation of the cardinal directions (north, east, south, and west) and their intermediate points. It is also the term for the graduated markings found on the traditional magnetic compass. Today, a form of compass rose is found on, or featured in, almost all navigation systems, including nautical charts, non-directional beacons, VHF omnidirectional range systems, GPS, and similar equipment.
Map: Strebe, using GeocartA gnomonic projection of a portion of the northern hemisphere, centered on the geographic North Pole. Such projections display all great circles as straight lines, resulting in any line segment on a gnomonic map showing the shortest route between the segment's two endpoints.
Photo credit: NASAThe world's largest compass rose, drawn on the desert floor at Edwards Air Force Base in California, United States. Painted on the dry lake near Dryden Flight Research Center, it is inclined to magnetic north and is used by pilots for calibrating heading indicators.
Map of Vatican CityMap: ThoroeA map of Vatican City (click for full resolution), highlighting notable buildings and the Vatican Gardens. The world's smallest independent state and the episcopal see of the Pope, Vatican City is entirely surrounded by the Italian city of Rome. As such, its geography is primarily urban and its climate similar to Italy's.
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