A spacecraft is a vehicle or machine designed to fly in outer space. Spacecraft are used for a variety of purposes, including communications, earth observation, navigation, space colonization, planetary exploration, transportation of humans and cargo. All spacecraft except single-stage-to-orbit vehicles cannot get into space on their own, require a launch vehicle. On a sub-orbital spaceflight, a space vehicle enters space and returns to the surface, without having gained sufficient energy or velocity to make a full orbit of the Earth. For orbital spaceflights, spacecraft enter closed orbits around the Earth or around other celestial bodies. Spacecraft used for human spaceflight carry people on board as crew or passengers from start or on orbit only, whereas those used for robotic space missions operate either autonomously or telerobotically. Robotic spacecraft used to support scientific research are space probes. Robotic spacecraft that remain in orbit around a planetary body are artificial satellites.
To date, only a handful of interstellar probes, such as Pioneer 10 and 11, Voyager 1 and 2, New Horizons, are on trajectories that leave the Solar System. Orbital spacecraft may be recoverable or not. Most are not. Recoverable spacecraft may be subdivided by method of reentry to Earth into non-winged space capsules and winged spaceplanes. Humanity has achieved space flight but only a few nations have the technology for orbital launches: Russia, the United States, the member states of the European Space Agency, China, Taiwan (National Chung-Shan Institute of Science and Technology, Taiwan National Space Organization, Israel and North Korea. A German V-2 became the first spacecraft when it reached an altitude of 189 km in June 1944 in Peenemünde, Germany. Sputnik 1 was the first artificial satellite, it was launched into an elliptical low Earth orbit by the Soviet Union on 4 October 1957. The launch ushered in new political, military and scientific developments. Apart from its value as a technological first, Sputnik 1 helped to identify the upper atmospheric layer's density, through measuring the satellite's orbital changes.
It provided data on radio-signal distribution in the ionosphere. Pressurized nitrogen in the satellite's false body provided the first opportunity for meteoroid detection. Sputnik 1 was launched during the International Geophysical Year from Site No.1/5, at the 5th Tyuratam range, in Kazakh SSR. The satellite travelled at 29,000 kilometers per hour, taking 96.2 minutes to complete an orbit, emitted radio signals at 20.005 and 40.002 MHz While Sputnik 1 was the first spacecraft to orbit the Earth, other man-made objects had reached an altitude of 100 km, the height required by the international organization Fédération Aéronautique Internationale to count as a spaceflight. This altitude is called the Kármán line. In particular, in the 1940s there were several test launches of the V-2 rocket, some of which reached altitudes well over 100 km; as of 2016, only three nations have flown crewed spacecraft: USSR/Russia, USA, China. The first crewed spacecraft was Vostok 1, which carried Soviet cosmonaut Yuri Gagarin into space in 1961, completed a full Earth orbit.
There were five other crewed missions. The second crewed spacecraft was named Freedom 7, it performed a sub-orbital spaceflight in 1961 carrying American astronaut Alan Shepard to an altitude of just over 187 kilometers. There were five other crewed missions using Mercury spacecraft. Other Soviet crewed spacecraft include the Voskhod, flown uncrewed as Zond/L1, L3, TKS, the Salyut and Mir crewed space stations. Other American crewed spacecraft include the Gemini spacecraft, Apollo spacecraft, the Skylab space station, the Space Shuttle with undetached European Spacelab and private US Spacehab space stations-modules. China developed, but did not fly Shuguang, is using Shenzhou. Except for the Space Shuttle, all of the recoverable crewed orbital spacecraft were space capsules. Crewed space capsules The International Space Station, crewed since November 2000, is a joint venture between Russia, the United States and several other countries; some reusable vehicles have been designed only for crewed spaceflight, these are called spaceplanes.
The first example of such was the North American X-15 spaceplane, which conducted two crewed flights which reached an altitude of over 100 km in the 1960s. The first reusable spacecraft, the X-15, was air-launched on a suborbital trajectory on July 19, 1963; the first reusable orbital spacecraft, a winged non-capsule, the Space Shuttle, was launched by the USA on the 20th anniversary of Yuri Gagarin's flight, on April 12, 1981. During the Shuttle era, six orbiters were built, all of which have flown in the atmosphere and five of which have flown in space. Enterprise was used only for approach and landing tests, launching from the back of a Boeing 747 SCA and gliding to deadstick landings at Edwards AFB, California; the first Space Shuttle to fly into space was Columbia, followed by Challenger, Discovery and Endeavour. Endeavour was built to replace Challenger when it was lost in January 1986. Columbia broke up during reentry in February 2003; the first automatic reusable spacecraft was the Buran-class shuttle, launched by the USSR on November 15, 1988, although it made only one flight and this was uncrewed.
This spaceplane was designed for a crew and resembled the U
Colonial Brazil comprises the period from 1500, with the arrival of the Portuguese, until 1815, when Brazil was elevated to a kingdom in union with Portugal as the United Kingdom of Portugal and the Algarves. During the early 300 years of Brazilian colonial history, the economic exploitation of the territory was based first on brazilwood extraction, which gave the territory its name. Slaves those brought from Africa, provided most of the work force of the Brazilian export economy after a brief period of Indian slavery to cut brazilwood. In contrast to the neighboring Spanish possessions, which had several viceroyalties with jurisdiction over New Spain and Peru, in the eighteenth century expanded to viceroyalties of Rio de la Plata and New Granada, the Portuguese colony of Brazil was settled in the coastal area by the Portuguese and a large black slave population working sugar plantations and mines; the boom and bust economic cycles were linked to export products. Brazil's sugar age, with the development of plantation slavery, merchants serving as middle men between production sites, Brazilian ports, Europe was undermined by the growth of the sugar industry in the Caribbean on islands that European powers seized from Spain.
Gold and diamonds were mined in southern Brazil through the end of the colonial era. Brazilian cities were port cities and the colonial administrative capital was moved several times in response to the rise and fall of export products' importance. Unlike Spanish America, which fragmented into many republics upon independence, Brazil remained a single administrative unit under a monarch, giving rise to the largest country in Latin America. Just as European Spanish and Roman Catholicism were a core source of cohesion among Spain's vast and multi-ethnic territories, Brazilian society was united by the Portuguese language and Roman Catholic faith; as the only Lusophone polity in the Western Hemisphere, the Portuguese language was important to Brazilian identity. Portugal and Spain pioneered the European charting of sea routes that were the first and only channels of interaction between all of the world's continents, thus beginning the process of globalization. In addition to the imperial and economic undertaking of discovery and colonization of lands distant from Europe, these years were filled with pronounced advancements in cartography and navigational instruments, of which the Portuguese and Spanish explorers took advantage.
In 1494, the two kingdoms of the Iberian Peninsula divided the New World between them, in 1500 navigator Pedro Álvares Cabral landed in what is now Brazil and laid claim to it in the name of King Manuel I of Portugal. The Portuguese identified brazilwood as a valuable red dye and an exploitable product, attempted to force indigenous groups in Brazil to cut the trees. Portuguese seafarers in the early fifteenth century began to expand from a small area of the Iberian Peninsula, to seizing the Muslim fortress of Ceuta in North Africa, its maritime exploration proceeded down the coast of West Africa and across the Indian Ocean to the south Asian subcontinent, as well as the Atlantic islands off the coast of Africa on the way. They sought sources of gold and African slaves, high value goods in the African trade; the Portuguese set up fortified trading "factories", whereby permanent small commercial settlements anchored trade in a region. The initial costs of setting up these commercial posts was borne by private investors, who in turn received hereditary titles and commercial advantages.
From the Portuguese Crown's point of view, its realm was expanded with little cost to itself. On the Atlantic islands of the Azores, Sāo Tomé, the Portuguese began plantation production of sugarcane using forced labor, a precedent for Brazil's sugar production in the sixteenth and seventeenth centuries; the Portuguese "discovery" of Brazil was preceded by a series of treaties between the kings of Portugal and Castile, following Portuguese sailings down the coast of Africa to India and the voyages to the Caribbean of the Genoese mariner sailing for Castile, Christopher Columbus. The most decisive of these treaties was the Treaty of Tordesillas, signed in 1494, which created the Tordesillas Meridian, dividing the world between the two kingdoms. All land discovered or to be discovered east of that meridian was to be the property of Portugal, everything to the west of it went to Spain; the Tordesillas Meridian divided South America into two parts, leaving a large chunk of land to be exploited by the Spaniards.
The Treaty of Tordesillas was arguably the most decisive event in all Brazilian history, since it determined that part of South America would be settled by Portugal instead of Spain. The present extent of Brazil's coastline is exactly that defined by the Treaty of Madrid, approved in 1750. On April 22, 1500, during the reign of King Manuel I, a fleet led by navigator Pedro Álvares Cabral landed in Brazil and took possession of the land in the name of the king. Although it is debated whether previous Portuguese explorers had been in Brazil, this date is and politically accepted as the day of the discovery of Brazil by Europeans. Álvares Cabral was leading a large fleet of 13 ships and more than 1000 men following Vasco da Gama's way to India, around Africa. The place where Álvares Cabral arrived is now known in Northeastern Brazil. After the voyage of Álvares Cabral, the Portuguese concentrated their efforts on the lucrative possessions in Africa and India
Military dictatorship in Brazil
The Brazilian military government was the authoritarian military dictatorship that ruled Brazil from April 1, 1964 to March 15, 1985. It began with the 1964 coup d'état led by the Armed Forces against the administration of President João Goulart—who, having been vice-president, had assumed the office of president upon the resignation of the democratically elected president Jânio Quadros—and ended when José Sarney took office on March 15, 1985 as President; the military revolt was fomented by Magalhães Pinto, Adhemar de Barros, Carlos Lacerda, governors of Minas Gerais, São Paulo, Guanabara. The coup was supported by the State Department of the United States through its embassy; the military dictatorship lasted for twenty-one years. The regime adopted nationalism, economic development, anti-communism as its guidelines; the dictatorship reached the height of its popularity in the 1970s with the so-called "Brazilian Miracle" as the regime censored all media, tortured and exiled dissidents. João Figueiredo became President in March 1979.
While combating the "hardline" members of the regime and supporting a re-democratization policy, he couldn't control the crumbling economy, chronic inflation and concurrent fall of other military dictatorships in South America. Amid massive popular demonstrations in the streets of the main cities of the country, the first free elections in 20 years were held for the national legislature in 1982. In 1985, another election was held, this time to elect a new president, being contested between civilian candidates for the first time since the 1960s, won by the opposition. In 1988, a new Constitution was passed and Brazil returned to democracy. Since the military has remained under the control of civilian politicians, with no official role in domestic politics. Brazil's military regime provided a model for other military regimes and dictatorships around Latin America, systematizing the “Doctrine of National Security”, which "justified" the military's actions as operating in the interest of national security in a time of crisis, creating an intellectual basis upon which other military regimes relied.
In 2014, nearly 30 years after the regime collapsed, the Brazilian military recognized for the first time the excesses committed by its agents during the years of the dictatorship, including the torture and murder of political dissidents. In May 2018, the United States government released a memorandum, written by Henry Kissinger, dating back to April 1974, confirming that the leadership of the Brazilian military regime was aware of the killing of dissidents, it is estimated that 434 people were either confirmed killed or went missing during the military dictatorship in Brazil. While some human rights activists and others assert that the true figure could be much higher, the armed forces have always disputed this. Brazil's political crisis stemmed from the way in which the political tensions had been controlled in the 1930s and 1940s during the Vargas Era. Vargas' dictatorship and the presidencies of his democratic successors marked different stages of Brazilian populism, an era of economic nationalism, state-guided modernization, import substitution trade policies.
Vargas' policies were intended to foster an autonomous capitalist development in Brazil, by linking industrialization to nationalism, a formula based on a strategy of reconciling the conflicting interests of the middle class, foreign capital, the working class, the landed oligarchy. This was the epic of the rise and fall of Brazilian populism from 1930 to 1964: Brazil witnessed over the course of this time period the change from export-orientation of the First Brazilian Republic to the import substitution of the populist era and to a moderate structuralism of 1964–80; each of these structural changes forced a realignment in society and caused a period of political crisis. Period of right-wing military dictatorship marked the transition between populist era and the current period of democratization; the Brazilian Armed Forces acquired great political clout after the Paraguayan War. The politicization of the Armed Forces was evidenced by the Proclamation of the Republic, which overthrew the Empire, or within Tenentismo and the Revolution of 1930.
Tensions escalated again in the 1950s, as important military circles joined the elite, medium classes and right-wing activists in attempts to stop Presidents Juscelino Kubitschek and João Goulart from taking office, due to their supposed support for Communist ideology. While Kubitschek proved to be friendly to capitalist institutions, Goulart promised far-reaching reforms, expropriated business interests and promoted economical-political neutrality with the USA. After Goulart assumed power in 1961, society became polarized, with the elites fearing that Brazil would become another Cuba and join Communist Bloc, while many thought that the reforms would boost the growth of Brazil and end its economical subservience with the US, or that Goulart could be used to increase the popularity of the Communist agenda. Influential politicians, such as Carlos Lacerda and Kubitschek, media moguls, the Church, l
Coffee is a brewed drink prepared from roasted coffee beans, the seeds of berries from certain Coffea species. The genus Coffea is native to tropical Africa and Madagascar, the Comoros, Réunion in the Indian Ocean. Coffee plants are now cultivated in over 70 countries in the equatorial regions of the Americas, Southeast Asia, Indian subcontinent, Africa; the two most grown are C. arabica and C. robusta. Once ripe, coffee berries are picked and dried. Dried coffee seeds are roasted to varying degrees, depending on the desired flavor. Roasted beans are ground and brewed with near-boiling water to produce the beverage known as coffee. Coffee is darkly colored, bitter acidic and has a stimulating effect in humans due to its caffeine content, it is one of the most popular drinks in the world, it can be prepared and presented in a variety of ways. It is served hot, although iced coffee is a popular alternative. Clinical studies indicate that moderate coffee consumption is benign or mildly beneficial in healthy adults, with continuing research on whether long-term consumption lowers the risk of some diseases, although those long-term studies are of poor quality.
The earliest credible evidence of coffee-drinking appears in modern-day Yemen in southern Arabia in the middle of the 15th century in Sufi shrines. It was here in Arabia that coffee seeds were first roasted and brewed in a similar way to how it is now prepared, but the coffee seeds had to be first exported from East Africa to Yemen, as the Coffea arabica plant is thought to have been indigenous to the former. The Yemenis began to cultivate the seed. By the 16th century, the drink had reached Persia and North Africa. From there, it spread to the rest of the world; as of 2016, Brazil was the leading grower of producing one-third of the world total. Coffee is a major export commodity, it is one of the most valuable commodities exported by developing countries. Green, unroasted coffee is one of the most traded agricultural commodities in the world; some controversy has been associated with coffee cultivation and the way developed countries trade with developing nations, as well as the impact on the environment with regards to the clearing of land for coffee-growing and water use.
The markets for fair trade and organic coffee are expanding, notably in the USA. The word coffee appears to have derived from the name of the region where coffee beans were first used by a herder in the 6th or 9th century: kaffa derived from Kaffa Province, the name of the region in ancient Abyssinia; the word "coffee" entered the English language in 1582 via the Dutch koffie, borrowed from the Ottoman Turkish kahve, borrowed in turn from the Arabic qahwah. The Arabic word qahwah was traditionally held to refer to a type of wine whose etymology is given by Arab lexicographers as deriving from the verb qahiya, "to lack hunger", in reference to the drink's reputation as an appetite suppressant, it has been proposed that the source may be the Proto-Central Semitic root q-h-h meaning "dark". The term "coffee pot" dates from 1705; the expression "coffee break" was first attested in 1952. According to legend, ancestors of today's Oromo people in a region of Kaffa in Ethiopia were believed to have been the first to recognize the energizing effect of the coffee plant.
However, there is no direct evidence, found earlier than the 15th century indicating where in Africa coffee first grew or who among the native populations might have used it as a stimulant. The story of Kaldi, the 9th-century Ethiopian goatherd who discovered coffee when he noticed how excited his goats became after eating the beans from a coffee plant, did not appear in writing until 1671 and is apocryphal. Other accounts attribute the discovery of coffee to Sheikh Omar. According to an ancient chronicle, known for his ability to cure the sick through prayer, was once exiled from Mocha in Yemen to a desert cave near Ousab. Starving, Omar found them to be bitter, he tried roasting the seeds to improve the flavor. He tried boiling them to soften the seed, which resulted in a fragrant brown liquid. Upon drinking the liquid Omar was sustained for days; as stories of this "miracle drug" reached Mocha, Omar was made a saint. The earliest credible evidence of coffee-drinking or knowledge of the coffee tree appears in the middle of the 15th century in the accounts of Ahmed al-Ghaffar in Yemen.
It was here in Arabia that coffee seeds were first roasted and brewed, in a similar way to how it is prepared now. Coffee was used by Sufi circles to stay awake for their religious rituals. Accounts differ on the origin of the coffee plant prior to its appearance in Yemen. From Ethiopia, coffee could have been introduced to Yemen via trade across the Red Sea. One account credits Muhammad Ibn Sa'd for bringing the beverage to Aden from the African coast. Other early accounts say Ali ben Omar of the Shadhili Sufi order was the first to introduce coffee to Arabia. According to al Shardi, Ali ben Omar may have encountered coffee during his stay with the Adal king Sadadin's companions in 1401. Famous 16th-century Islamic scholar Ibn Hajar al-Haytami notes in his
Brazil the Federative Republic of Brazil, is the largest country in both South America and Latin America. At 8.5 million square kilometers and with over 208 million people, Brazil is the world's fifth-largest country by area and the fifth most populous. Its capital is Brasília, its most populated city is São Paulo; the federation is composed of the union of the 26 states, the Federal District, the 5,570 municipalities. It is the largest country to have Portuguese as an official language and the only one in the Americas. Bounded by the Atlantic Ocean on the east, Brazil has a coastline of 7,491 kilometers, it borders all other South American countries except Ecuador and Chile and covers 47.3% of the continent's land area. Its Amazon River basin includes a vast tropical forest, home to diverse wildlife, a variety of ecological systems, extensive natural resources spanning numerous protected habitats; this unique environmental heritage makes Brazil one of 17 megadiverse countries, is the subject of significant global interest and debate regarding deforestation and environmental protection.
Brazil was inhabited by numerous tribal nations prior to the landing in 1500 of explorer Pedro Álvares Cabral, who claimed the area for the Portuguese Empire. Brazil remained a Portuguese colony until 1808, when the capital of the empire was transferred from Lisbon to Rio de Janeiro. In 1815, the colony was elevated to the rank of kingdom upon the formation of the United Kingdom of Portugal and the Algarves. Independence was achieved in 1822 with the creation of the Empire of Brazil, a unitary state governed under a constitutional monarchy and a parliamentary system; the ratification of the first constitution in 1824 led to the formation of a bicameral legislature, now called the National Congress. The country became a presidential republic in 1889 following a military coup d'état. An authoritarian military junta came to power in 1964 and ruled until 1985, after which civilian governance resumed. Brazil's current constitution, formulated in 1988, defines it as a democratic federal republic. Due to its rich culture and history, the country ranks thirteenth in the world by number of UNESCO World Heritage Sites.
Brazil is considered an advanced emerging economy. It has the ninth largest GDP in the world by nominal, eight and PPP measures, it is one of the world's major breadbaskets, being the largest producer of coffee for the last 150 years. It is classified as an upper-middle income economy by the World Bank and a newly industrialized country, with the largest share of global wealth in Latin America. Brazil is a regional power and sometimes considered a great or a middle power in international affairs. On account of its international recognition and influence, the country is subsequently classified as an emerging power and a potential superpower by several analysts. Brazil is a founding member of the United Nations, the G20, BRICS, Union of South American Nations, Organization of American States, Organization of Ibero-American States and the Community of Portuguese Language Countries, it is that the word "Brazil" comes from the Portuguese word for brazilwood, a tree that once grew plentifully along the Brazilian coast.
In Portuguese, brazilwood is called pau-brasil, with the word brasil given the etymology "red like an ember", formed from brasa and the suffix -il. As brazilwood produces a deep red dye, it was valued by the European textile industry and was the earliest commercially exploited product from Brazil. Throughout the 16th century, massive amounts of brazilwood were harvested by indigenous peoples along the Brazilian coast, who sold the timber to European traders in return for assorted European consumer goods; the official Portuguese name of the land, in original Portuguese records, was the "Land of the Holy Cross", but European sailors and merchants called it the "Land of Brazil" because of the brazilwood trade. The popular appellation eclipsed and supplanted the official Portuguese name; some early sailors called it the "Land of Parrots". In the Guarani language, an official language of Paraguay, Brazil is called "Pindorama"; this was the name the indigenous population gave to the region, meaning "land of the palm trees".
Some of the earliest human remains found in the Americas, Luzia Woman, were found in the area of Pedro Leopoldo, Minas Gerais and provide evidence of human habitation going back at least 11,000 years. The earliest pottery found in the Western Hemisphere was excavated in the Amazon basin of Brazil and radiocarbon dated to 8,000 years ago; the pottery was found near Santarém and provides evidence that the tropical forest region supported a complex prehistoric culture. The Marajoara culture flourished on Marajó in the Amazon delta from 800 CE to 1400 CE, developing sophisticated pottery, social stratification, large populations, mound building, complex social formations such as chiefdoms. Around the time of the Portuguese arrival, the territory of current day Brazil had an estimated indigenous population of 7 million people semi-nomadic who subsisted on hunting, fishing and migrant agriculture; the indigenous population of Brazil comprised several large indigenous ethnic groups. The Tupí people were subdivided into the Tupiniquins and Tupinambás, there were many subdivisions of the other gro
Geography of Brazil
The country of Brazil occupies half of South America, bordering the Atlantic Ocean. Brazil covers a total area of 8,514,215 km2 which includes 8,456,510 km2 of land and 55,455 km2 of water; the highest point in Brazil is Pico da Neblina at 2,994 m. Brazil is bordered by the countries of Argentina, Colombia, Paraguay, Suriname, Uruguay and France. Much of the climate is tropical, with the south being temperate; the largest river in Brazil, the second longest in the world, is the Amazon. Brazil occupies most of the eastern part of the South American continent and its geographic heartland, as well as various islands in the Atlantic Ocean; the only countries in the world that are larger are Russia, Canada and the United States. The national territory extends 4,395 kilometers from north to south, 4,319 kilometers from east to west, it spans three time zones, the westernmost of, one hour ahead of Eastern Standard Time in the United States. The time zone of the capital and of the most populated part of Brazil along the east coast is two hours ahead of Eastern Standard Time, except when it is on its own daylight saving time, from October to February.
The Atlantic islands are in the easternmost time zone. Brazil possesses the archipelago of Fernando de Noronha, located 350 kilometers northeast of its "horn", several small islands and atolls in the Atlantic - Abrolhos, Atol das Rocas, Penedos de São Pedro e São Paulo and Martim Vaz. In the early 1970s, Brazil claimed a territorial sea extending 362 kilometers from the country's shores, including those of the islands. On Brazil's east coast, the Atlantic coastline extends 7,367 kilometers. In the west, in clockwise order from the south, Brazil has 15,719 kilometers of borders with Uruguay, Paraguay, Peru, Venezuela, Guyana and French Guiana; the only South American countries with which Brazil does not share borders are Ecuador. A few short sections are in question, but there are no true major boundary controversies with any of the neighboring countries. Brazil has six major ecosystems: a tropical rainforest system. In contrast to the Andes, which rose to elevations of nearly 7,000 meters in a recent epoch and inverted the Amazon's direction of flow from westward to eastward, Brazil's geological formation is old.
Precambrian crystalline shields cover 36% of the territory its central area. The dramatic granite sugarloaf mountains in the city of Rio de Janeiro are an example of the terrain of the Brazilian shield regions, where continental basement rock has been sculpted into towering domes and columns by tens of millions of years of erosion, untouched by mountain-building events; the principal mountain ranges average elevations just under 2,000 meters. The Serra do Mar Range hugs the Atlantic coast, the Serra do Espinhaço Range, the largest in area, extends through the south-central part of the country; the highest mountains are in the Tumucumaque and Imeri ranges, among others, which traverse the northern border with the Guianas and Venezuela. In addition to mountain ranges, Brazil's Central Highlands include a vast central plateau; the plateau's uneven terrain has an average elevation of 1,000 meters. The rest of the territory is made up of sedimentary basins, the largest of, drained by the Amazon and its tributaries.
Of the total territory, 41% averages less than 200 meters in elevation. The coastal zone is noted for thousands of kilometers of tropical beaches interspersed with mangroves and dunes, as well as numerous coral reefs; the Parcel de Manuel Luís Marine State Park off the coast of Maranhão protects the largest coral reef in South America. Brazil has one of the world's most extensive river systems, with eight major drainage basins, all of which drain into the Atlantic Ocean. Two of these basins — the Amazon and Tocantins-Araguaia account for more than half the total drainage area; the largest river system in Brazil is the Amazon, which originates in the Andes and receives tributaries from a basin that covers 45.7% of the country, principally the north and west. The main Amazon river system is the Amazonas-Solimões-Ucayali axis. Through the Amazon Basin flows one-fifth of the world's fresh water. A total of 3,615 kilometers of the Amazon are in Brazilian territory. Over this distance, the waters decline only about 100 meters.
The major tributaries on the southern side are, from west to east, the Javari, Juruá, Madeira, Tapajós, Tocantins. On the northern side, the largest tributaries are the Branco, Japurá, Rio Negro; the above-mentioned tributaries carry more water than the Mississippi. The Amazon and some of its tributaries, call
History of Brazil
The history of Brazil starts with indigenous people in Brazil. Europeans arrived in Brazil at the opening of the 16th century; the first European to colonize what is now the Federative Republic of Brazil on the continent of South America was Pedro Álvares Cabral on April 22, 1500 under the sponsorship of the Kingdom of Portugal. From the 16th to the early 19th century, Brazil was a part of the Portuguese Empire; the country expanded south along the coast and west along the Amazon and other inland rivers from the original 15 donatary captaincy colonies established on the northeast Atlantic coast east of the Tordesillas Line of 1494 that divided the Portuguese domain to the east from the Spanish domain to the west. The country's borders were only finalized in the early 20th century. On September 7, 1822, the country declared its independence from Portugal and it became the Empire of Brazil. A military coup in 1889 established the First Brazilian Republic; the country has seen two dictatorship periods: the first during Vargas Era and the second during the military rule under Brazilian military government.
When Portuguese explorers arrived in Brazil, the region was inhabited by hundreds of different types of Jiquabu tribes, "the earliest going back at least 10,000 years in the highlands of Minas Gerais". The dating of the origins of the first inhabitants, who were called "Indians" by the Portuguese, is still a matter of dispute among archaeologists; the earliest pottery found in the Western Hemisphere, radiocarbon-dated 8,000 years old, has been excavated in the Amazon basin of Brazil, near Santarém, providing evidence to overturn the assumption that the tropical forest region was too poor in resources to have supported a complex prehistoric culture". The current most accepted view of anthropologists and geneticists is that the early tribes were part of the first wave of migrant hunters who came into the Americas from Asia, either by land, across the Bering Strait, or by coastal sea routes along the Pacific, or both; the Andes and the mountain ranges of northern South America created a rather sharp cultural boundary between the settled agrarian civilizations of the west coast and the semi-nomadic tribes of the east, who never developed written records or permanent monumental architecture.
For this reason little is known about the history of Brazil before 1500. Archaeological remains indicate a complex pattern of regional cultural developments, internal migrations, occasional large state-like federations. At the time of European discovery, the territory of current day Brazil had as many as 2,000 tribes; the indigenous peoples were traditionally semi-nomadic tribes who subsisted on hunting, fishing and migrant agriculture. When the Portuguese arrived in 1500, the Natives were living on the coast and along the banks of major rivers. Tribal warfare and the pursuit of brazilwood for its treasured red dye convinced the Portuguese that they should Christianize the natives, but the Portuguese, like the Spanish in their South American possessions, had brought diseases with them, against which many Natives were helpless due to lack of immunity. Measles, tuberculosis and influenza killed tens of thousands of indigenous people; the diseases spread along the indigenous trade routes, whole tribes were annihilated without coming in direct contact with Europeans.
Marajoara culture flourished on Marajó island at the mouth of the Amazon River. Archeologists have found sophisticated pottery in their excavations on the island; these pieces are large, elaborately painted and incised with representations of plants and animals. These provided the first evidence that a complex society had existed on Marajó. Evidence of mound building further suggests that well-populated and sophisticated settlements developed on this island, as only such settlements were believed capable of such extended projects as major earthworks; the extent, level of complexity, resource interactions of the Marajoara culture have been disputed. Working in the 1950s in some of her earliest research, American Betty Meggers suggested that the society migrated from the Andes and settled on the island. Many researchers believed that the Andes were populated by Paleoindian migrants from North America who moved south after being hunters on the plains. In the 1980s, another American archeologist, Anna Curtenius Roosevelt, led excavations and geophysical surveys of the mound Teso dos Bichos.
She concluded. The pre-Columbian culture of Marajó may have developed social stratification and supported a population as large as 100,000 people; the Native Americans of the Amazon rainforest may have used their method of developing and working in Terra preta to make the land suitable for the large-scale agriculture needed to support large populations and complex social formations such as chiefdoms. There are many theories regarding, the first European to set foot on the land now called Brazil. Besides the accepted view of Cabral's discovery, some say that it was Duarte Pacheco Pereira between November and December 1498 and some others say that it was first encountered by Vicente Yáñez Pinzón, a Spanish navigator who had accompanied Colombus in his first voyage of discovery to the Americas, having arrived in today's Pernambuco region on 26 January 1500 but was unable to claim the land because of the Treaty of Tordesillas. In April 1500, Brazil was claimed for Portugal on the arrival of the Portuguese fleet commanded by Pedro Álvares Cabral.
The Portuguese encountered stone-using natives d