Texas is the second largest state in the United States by both area and population. Geographically located in the South Central region of the country, Texas shares borders with the U. S. states of Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the west, the Mexican states of Chihuahua, Nuevo León, Tamaulipas to the southwest, while the Gulf of Mexico is to the southeast. Houston is the most populous city in Texas and the fourth largest in the U. S. while San Antonio is the second-most populous in the state and seventh largest in the U. S. Dallas–Fort Worth and Greater Houston are the fourth and fifth largest metropolitan statistical areas in the country, respectively. Other major cities include Austin, the second-most populous state capital in the U. S. and El Paso. Texas is nicknamed "The Lone Star State" to signify its former status as an independent republic, as a reminder of the state's struggle for independence from Mexico; the "Lone Star" can be found on the Texan state seal.
The origin of Texas's name is from the word taysha. Due to its size and geologic features such as the Balcones Fault, Texas contains diverse landscapes common to both the U. S. Southern and Southwestern regions. Although Texas is popularly associated with the U. S. southwestern deserts, less than 10% of Texas's land area is desert. Most of the population centers are in areas of former prairies, grasslands and the coastline. Traveling from east to west, one can observe terrain that ranges from coastal swamps and piney woods, to rolling plains and rugged hills, the desert and mountains of the Big Bend; the term "six flags over Texas" refers to several nations. Spain was the first European country to claim the area of Texas. France held a short-lived colony. Mexico controlled the territory until 1836 when Texas won its independence, becoming an independent Republic. In 1845, Texas joined the union as the 28th state; the state's annexation set off a chain of events that led to the Mexican–American War in 1846.
A slave state before the American Civil War, Texas declared its secession from the U. S. in early 1861, joined the Confederate States of America on March 2nd of the same year. After the Civil War and the restoration of its representation in the federal government, Texas entered a long period of economic stagnation. Four major industries shaped the Texas economy prior to World War II: cattle and bison, cotton and oil. Before and after the U. S. Civil War the cattle industry, which Texas came to dominate, was a major economic driver for the state, thus creating the traditional image of the Texas cowboy. In the 19th century cotton and lumber grew to be major industries as the cattle industry became less lucrative, it was though, the discovery of major petroleum deposits that initiated an economic boom which became the driving force behind the economy for much of the 20th century. With strong investments in universities, Texas developed a diversified economy and high tech industry in the mid-20th century.
As of 2015, it is second on the list of the most Fortune 500 companies with 54. With a growing base of industry, the state leads in many industries, including agriculture, energy and electronics, biomedical sciences. Texas has led the U. S. in state export revenue since 2002, has the second-highest gross state product. If Texas were a sovereign state, it would be the 10th largest economy in the world; the name Texas, based on the Caddo word táyshaʼ "friend", was applied, in the spelling Tejas or Texas, by the Spanish to the Caddo themselves the Hasinai Confederacy, the final -s representing the Spanish plural. The Mission San Francisco de los Tejas was completed near the Hasinai village of Nabedaches in May 1690, in what is now Houston County, East Texas. During Spanish colonial rule, in the 18th century, the area was known as Nuevo Reino de Filipinas "New Kingdom of the Philippines", or as provincia de los Tejas "province of the Tejas" also provincia de Texas, "province of Texas", it was incorporated as provincia de Texas into the Mexican Empire in 1821, declared a republic in 1836.
The Royal Spanish Academy recognizes both spellings and Texas, as Spanish-language forms of the name of the U. S. State of Texas; the English pronunciation with /ks/ is unetymological, based in the value of the letter x in historical Spanish orthography. Alternative etymologies of the name advanced in the late 19th century connected the Spanish teja "rooftile", the plural tejas being used to designate indigenous Pueblo settlements. A 1760s map by Jacques-Nicolas Bellin shows a village named Teijas on Trinity River, close to the site of modern Crockett. Texas is the second-largest U. S. state, with an area of 268,820 square miles. Though 10% larger than France and twice as large as Germany or Japan, it ranks only 27th worldwide amongst country subdivisions by size. If it were an independent country, Texas would be the 40th largest behind Zambia. Texas is in the south central part of the United States of America. Three of its borders are defined by rivers; the Rio Grande forms a natural border with the Mexican states of Chihuahua, Nuevo León, Tamaulipas to the south.
The Red River forms a natural border with Arkansas to the north. The Sabine River forms a natural border with Louisiana to the east; the Texas Panhandle has an eastern border with Oklahoma at 100° W, a northern border with Oklahoma at 36°30' N and a western
Republic of Texas
The Republic of Texas was a sovereign state in North America that existed from March 2, 1836, to February 19, 1846. It was bordered by Mexico to the west and southwest, the Gulf of Mexico to the southeast, the two U. S. states of Louisiana and Arkansas to the east and northeast, United States territories encompassing parts of the current U. S. states of Oklahoma, Colorado and New Mexico to the north and west. The citizens of the republic were known as Texians; the region of the Mexican state of Coahuila y Tejas referred to as Mexican Texas declared its independence from Mexico during the Texas Revolution in 1836. The Texas war of independence ended on April 21, 1836, but Mexico refused to recognize the independence of the Republic of Texas, intermittent conflicts between the two states continued into the 1840s; the United States recognized the Republic of Texas in March 1837 but declined to annex the territory. The Republic-claimed borders were based upon the Treaties of Velasco between the newly created Texas Republic and Antonio López de Santa Anna of Mexico.
The eastern boundary had been defined by the Adams–Onís Treaty of 1819 between the United States and Spain, which recognised the Sabine River as the eastern boundary of Spanish Texas and western boundary of the Missouri Territory. Under the Adams–Onís Treaty of 1819 the United States had renounced its claim to Spanish land to the east of the Rocky Mountains and to the north of the Rio Grande, which it claimed to have acquired as part of the Louisiana Purchase of 1803; the republic's southern and western boundary with Mexico was disputed throughout the republic's existence. Texas claimed the Rio Grande as its southern boundary, while Mexico insisted that the Nueces River was the boundary. Texas was annexed by the United States on December 29, 1845 and was admitted to the Union as the 28th state on that day, with the transfer of power from the Republic to the new state of Texas formally taking place on February 19, 1846. However, the United States again inherited the southern and western border dispute with Mexico, which became a trigger for the Mexican–American War.
Texas had been one of the Provincias Internas of New Spain, a region known historiographically as Spanish Texas. Though claimed by Spain, it was not formally colonized by them until competing French interests at Fort St. Louis encouraged Spain to establish permanent settlements in the area. Sporadic missionary incursions occurred into the area during the period from the 1690s–1710s, before the establishment of San Antonio as a permanent civilian settlement. Owing to the area's high Native American populations and its remoteness from the population centers of New Spain, Texas remained unsettled by Europeans, although Spain maintained a small military presence to protect Christian missionaries working among Native American tribes, to act as a buffer against the French in Louisiana and British North America. In 1762, France ceded to Spain most of its claims to the interior of North America, including its claim to Texas, as well as the vast interior that became Spanish Louisiana. During the years 1799 to 1803, the height of the Napoleonic Empire, Spain returned Louisiana back to France, which promptly sold the territory to the United States.
The status of Texas during these transfers was unclear and was not resolved until 1819, when the Adams–Onís Treaty ceded Spanish Florida to the United States, established a clear boundary between Texas and Louisiana. Starting in 1810, the territories of New Spain north of the Isthmus of Panama sought independence in the Mexican War of Independence. Many Americans fought on the side of Mexico against Spain in filibustering expeditions. One of these, the Gutiérrez–Magee Expedition consisted of a group of about 130 Americans under the leadership of Bernardo Gutiérrez de Lara. Gutierrez de Lara initiated Mexico's secession from Spain with efforts contributed by Augustus Magee. Bolstered by new recruits, led by Samuel Kemper, the expedition gained a series of victories against soldiers led by the Spanish governor, Manuel María de Salcedo, their victory at the Battle of Rosillo Creek convinced Salcedo to surrender on April 1, 1813. On April 6, 1813, the victorious Republican Army of the North drafted a constitution and declared the independent Republic of Texas, with Gutiérrez as its president.
Soon disillusioned with the Mexican leadership, the Americans under Kemper returned to the United States. The ephemeral Republic of Texas came to an end following the August 18, 1813 Battle of Medina, where the Spanish Army crushed the Republican Army of the North; the harsh reprisals against the Texas rebels created a deep distrust of the Royal Spanish authorities, veterans of the Battle of Medina became leaders of the Texas Revolution and signatories of the Texas Declaration of Independence from Mexico 20 years later. Along with the rest of Mexico, Texas gained its independence from Spain in 1821 following the Treaty of Córdoba, the new Mexican state was organized under the Plan of Iguala, which created Mexico as a constitutional monarchy under its first Emperor Agustín de Iturbide. During the transition from a Spanish territory to part of the independent country of Mexico, Stephen F. Austin led a group of American settlers known as the Old Three Hundred, who negotiated the right to settle in Texas with the Spanish Royal governor of the territory.
Since Mexican independence had been ratified by Spain shortly thereafter, Austin traveled to Mexico City to secure the support of the new country for his right to settle. The establishment of Mexican Texas coincided with the Austin-led settleme
Antarctica is Earth's southernmost continent. It contains the geographic South Pole and is situated in the Antarctic region of the Southern Hemisphere entirely south of the Antarctic Circle, is surrounded by the Southern Ocean. At 14,200,000 square kilometres, it is the fifth-largest continent. For comparison, Antarctica is nearly twice the size of Australia. About 98% of Antarctica is covered by ice that averages 1.9 km in thickness, which extends to all but the northernmost reaches of the Antarctic Peninsula. Antarctica, on average, is the coldest and windiest continent, has the highest average elevation of all the continents. Most of Antarctica is a polar desert, with annual precipitation of only 200 mm along the coast and far less inland; the temperature in Antarctica has reached −89.2 °C, though the average for the third quarter is −63 °C. Anywhere from 1,000 to 5,000 people reside throughout the year at research stations scattered across the continent. Organisms native to Antarctica include many types of algae, fungi, plants and certain animals, such as mites, penguins and tardigrades.
Vegetation, where it occurs, is tundra. Antarctica is noted as the last region on Earth in recorded history to be discovered, unseen until 1820 when the Russian expedition of Fabian Gottlieb von Bellingshausen and Mikhail Lazarev on Vostok and Mirny sighted the Fimbul ice shelf; the continent, remained neglected for the rest of the 19th century because of its hostile environment, lack of accessible resources, isolation. In 1895, the first confirmed. Antarctica is a de facto condominium, governed by parties to the Antarctic Treaty System that have consulting status. Twelve countries signed the Antarctic Treaty in 1959, thirty-eight have signed it since then; the treaty prohibits military activities and mineral mining, prohibits nuclear explosions and nuclear waste disposal, supports scientific research, protects the continent's ecozone. Ongoing experiments are conducted by more than 4,000 scientists from many nations; the name Antarctica is the romanised version of the Greek compound word ἀνταρκτική, feminine of ἀνταρκτικός, meaning "opposite to the Arctic", "opposite to the north".
Aristotle wrote in his book Meteorology about an Antarctic region in c. 350 BC Marinus of Tyre used the name in his unpreserved world map from the 2nd century CE. The Roman authors Hyginus and Apuleius used for the South Pole the romanised Greek name polus antarcticus, from which derived the Old French pole antartike attested in 1270, from there the Middle English pol antartik in a 1391 technical treatise by Geoffrey Chaucer. Before acquiring its present geographical connotations, the term was used for other locations that could be defined as "opposite to the north". For example, the short-lived French colony established in Brazil in the 16th century was called "France Antarctique"; the first formal use of the name "Antarctica" as a continental name in the 1890s is attributed to the Scottish cartographer John George Bartholomew. The long-imagined south polar continent was called Terra Australis, sometimes shortened to'Australia' as seen in a woodcut illustration titled Sphere of the winds, contained in an astrological textbook published in Frankfurt in 1545.
Although the longer Latin phrase was better known, the shortened name Australia was used in Europe's scholarly circles. In the nineteenth century, the colonial authorities in Sydney removed the Dutch name from New Holland. Instead of inventing a new name to replace it, they took the name Australia from the south polar continent, leaving it nameless for some eighty years. During that period, geographers had to make do with clumsy phrases such as "the Antarctic Continent", they searched for a more poetic replacement, suggesting various names such as Antipodea. Antarctica was adopted in the 1890s. Antarctica has no indigenous population, there is no evidence that it was seen by humans until the 19th century. However, in February 1775, during his second voyage, Captain Cook called the existence of such a polar continent "probable" and in another copy of his journal he wrote:" believe it and it's more than probable that we have seen a part of it". However, belief in the existence of a Terra Australis—a vast continent in the far south of the globe to "balance" the northern lands of Europe and North Africa—had prevailed since the times of Ptolemy in the 1st century AD.
In the late 17th century, after explorers had found that South America and Australia were not part of the fabled "Antarctica", geographers believed that the continent was much larger than its actual size. Integral to the story of the origin of Antarctica's name is that it was not named Terra Australis—this name was given to Australia instead, because of the misconception that no significant landmass could exist further south. Explorer Matthew Flinders, in particular, has been credited with popularising the transfer of the name Terra Australis to Australia, he justified the titling of his book A Voyage to Terra Australis by writing in the introduction: There is no probability, that any other detached body of land, of nearly equal extent, will be found in a more southern latitude.
Stephen F. Austin
Stephen Fuller Austin was an American empresario. Known as the "Father of Texas", the founder of Texas, he led the second, the successful colonization of the region by bringing 300 families from the United States to the region in 1825. Born in Virginia and raised in southeastern Missouri, Austin served in the Missouri territorial legislature before moving to Arkansas Territory and Louisiana, his father, Moses Austin, received an empresario grant from Spain to settle Texas. After Moses Austin's death in 1821, Stephen Austin won recognition of the empresario grant from the newly independent state of Mexico. Austin convinced numerous American settlers to move to Texas, by 1825 Austin had brought the first 300 American families into the territory. Throughout the 1820s, Austin sought to maintain good relations with the Mexican government, he helped suppress the Fredonian Rebellion, he helped ensure the introduction of slavery into Texas despite the attempts of the Mexican government to ban the institution.
He led the initial actions against the Karankawa people in this area. As Texas settlers became dissatisfied with the Mexican government, Austin advocated conciliation, but the dissent against Mexico escalated into the Texas Revolution. Austin led Texas forces at the successful Siege of Béxar before serving as a commissioner to the United States. Austin was defeated by Sam Houston. Houston appointed Austin as secretary of state for the new republic, Austin held that position until his death in December 1836. Numerous places and institutions are named in his honor, including the capital of Texas, Austin in Travis County, Austin County, Austin Bayou, Stephen F. Austin State University in Nacogdoches, Austin College in Sherman, a number of K-12 schools. Stephen F. Austin was born in the mining region of southwestern Virginia in what is known as Austinville today, some 256 miles southwest of Richmond, Virginia, he was the second child of Mary Brown Moses Austin. On June 8, 1798, when Stephen was four years old, his family moved west to the lead-mining region of present-day Potosi, Missouri, 40 miles west of the Mississippi River.
His father Moses Austin received a sitio from the Spanish government for the mining site of Mine à Breton, established by French colonists. His great-great-grandfather, Anthony Austin, was the son of Richard Austin, he and his wife Esther were original settlers of Suffield, which became Connecticut in 1749; when Austin was eleven years old, his family sent him back east to be educated, first at the preparatory school of Bacon Academy in Colchester, Connecticut. He studied at Transylvania University in Lexington, from which he graduated in 1810. After graduation, Austin began reading the law with an established firm. At age 21, he was served in the legislature of the Missouri Territory; as a member of the territorial legislature, he was "influential in obtaining a charter for the struggling Bank of St. Louis."Left penniless after the Panic of 1819, Austin decided to move south to the new Arkansas Territory. He acquired property on the south bank of the Arkansas River, in the area that would become Little Rock.
After purchasing the property, he learned the area was being considered as the location for the new territorial capital, which could make his land worth a great deal more. He made his home in Arkansas. Two weeks before the first Arkansas territorial elections in 1820, Austin declared his candidacy for Congress, his late entrance meant his name did not appear on the ballot in two of the five counties, but he still placed second in the field of six candidates. He was appointed as a judge for the First Circuit Court. Over the next few months, Little Rock did become the territorial capital, but Austin's claim to land in the area was contested, the courts ruled against him. The Territorial Assembly abolished Austin's judgeship. Austin left the territory, he reached New Orleans in November 1820, where he met and stayed with Joseph H. Hawkins, a New Orleans lawyer and former Kentucky congressman, he made arrangements to study law with him. During Austin's time in Arkansas, his father traveled to Spanish Texas and received an empresarial grant that would allow him to bring 300 American families to Texas, they would be called "The Old 300."
Moses Austin caught pneumonia soon after returning to Missouri. He directed. Although Austin was reluctant to carry on his father's Texas venture, he was persuaded to pursue the colonization of Texas by a letter from his mother, Mary Brown Austin, written two days before Moses Austin would die. Austin boarded the steamer and departed to New Orleans to meet Spanish officials led by Erasmo Seguín, he was on June 31, 1821, when he learned of his father's death. "This news has effected me much, he was one of the most feeling and affectionate Fathers that lived. His faults I now say, always have, were not of the heart."Austin led his party to travel 300 miles in four weeks to San Antonio with the intent of reauthorizing his father's grant, arriving on August 12. While in transit, they learned Mexico had declared its independence from Spain, Texas had become a Mexican province, rather than a Spanish territory. José Antonio Navarro, a San Antonio native with ambitious visions of the future of Texas, befriended Stephen F. Austin, the two developed a lasting association.
Navarro, proficient in Spanis
United States Geological Survey
The United States Geological Survey is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, the natural hazards that threaten it; the organization has four major science disciplines, concerning biology, geography and hydrology. The USGS is a fact-finding research organization with no regulatory responsibility; the USGS is a bureau of the United States Department of the Interior. The USGS employs 8,670 people and is headquartered in Reston, Virginia; the USGS has major offices near Lakewood, Colorado, at the Denver Federal Center, Menlo Park, California. The current motto of the USGS, in use since August 1997, is "science for a changing world." The agency's previous slogan, adopted on the occasion of its hundredth anniversary, was "Earth Science in the Public Service." Since 2012, the USGS science focus is directed at six topical "Mission Areas", namely Climate and Land Use Change, Core Science Systems, Ecosystems and Minerals and Environmental Health, Natural Hazards, Water.
In December 2012, the USGS split the Energy and Minerals and Environmental Health Mission Area resulting in seven topical Mission Areas, with the two new areas being: Energy and Minerals and Environmental Health. Administratively, it is divided into six Regional Units. Other specific programs include: Earthquake Hazards Program monitors earthquake activity worldwide; the National Earthquake Information Center in Golden, Colorado on the campus of the Colorado School of Mines detects the location and magnitude of global earthquakes. The USGS runs or supports several regional monitoring networks in the United States under the umbrella of the Advanced National Seismic System; the USGS informs authorities, emergency responders, the media, the public, both domestic and worldwide, about significant earthquakes. It maintains long-term archives of earthquake data for scientific and engineering research, it conducts and supports research on long-term seismic hazards. USGS has released the UCERF California earthquake forecast.
As of 2005, the agency is working to create a National Volcano Early Warning System by improving the instrumentation monitoring the 169 volcanoes in U. S. territory and by establishing methods for measuring the relative threats posed at each site. The USGS National Geomagnetism Program monitors the magnetic field at magnetic observatories and distributes magnetometer data in real time; the USGS collaborates with Canadian and Mexican government scientists, along with the Commission for Environmental Cooperation, to produce the North American Environmental Atlas, used to depict and track environmental issues for a continental perspective. The USGS operates the streamgaging network for the United States, with over 7400 streamgages. Real-time streamflow data are available online. National Climate Change and Wildlife Science Center implements partner-driven science to improve understanding of past and present land use change, develops relevant climate and land use forecasts, identifies lands and communities that are most vulnerable to adverse impacts of change from the local to global scale.
Since 1962, the Astrogeology Research Program has been involved in global and planetary exploration and mapping. In collaboration with Stanford University, the USGS operates the USGS-Stanford Ion Microprobe Laboratory, a world-class analytical facility for U--Pb geochronology and trace element analyses of minerals and other earth materials. USGS operates a number of water related programs, notably the National Streamflow Information Program and National Water-Quality Assessment Program. USGS Water data is publicly available from their National Water Information System database; the USGS operates the National Wildlife Health Center, whose mission is "to serve the nation and its natural resources by providing sound science and technical support, to disseminate information to promote science-based decisions affecting wildlife and ecosystem health. The NWHC provides information, technical assistance, research and leadership on national and international wildlife health issues." It is the agency responsible for surveillance of H5N1 avian influenza outbreaks in the United States.
The USGS runs 17 biological research centers in the United States, including the Patuxent Wildlife Research Center. The USGS is investigating collaboration with the social networking site Twitter to allow for more rapid construction of ShakeMaps; the USGS produces several national series of topographic maps which vary in scale and extent, with some wide gaps in coverage, notably the complete absence of 1:50,000 scale topographic maps or their equivalent. The largest and best-known topographic series is the 7.5-minute, 1:24,000 scale, quadrangle, a non-metric scale unique to the United States. Each of these maps covers an area bounded by two lines of latitude and two lines of longitude spaced 7.5 minutes apart. Nearly 57,000 individual maps in this series cover the 48 contiguous states, Hawaii, U. S. territories, areas of Alaska near Anchorage and Prudhoe Bay. The area covered by each map varies with the latitude of its represented location due to convergence of the meridians. At lower latitudes, near 30° north, a 7.5-minute quadrangle contains an area of about 64 square miles.
At 49° north latitude, 49 square miles are contained within a quadrangle of that size. As a unique non-metric map scale, the 1:24,000 scale requires a separate and specialized romer scale for pl