Indigenous peoples of the Americas in the context of Tulare Lake

Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos. It uses mathematics, physics, and chemistry to explain their origin and their overall evolution. Objects of interest include planets, moons, stars, nebulae, galaxies, meteoroids, asteroids, and comets. Relevant phenomena include supernova explosions, gamma ray bursts, quasars, blazars, pulsars, and cosmic microwave background radiation. More generally, astronomy studies everything that originates beyond Earth's atmosphere. Cosmology is the branch of astronomy that studies the universe as a whole.

Astronomy is one of the oldest natural sciences. The early civilizations in recorded history made methodical observations of the night sky. These include the Egyptians, Babylonians, Greeks, Indians, Chinese, Maya, and many ancient indigenous peoples of the Americas. In the past, astronomy included disciplines as diverse as astrometry, celestial navigation, observational astronomy, and the making of calendars.

Puerto Rico (abbreviated PR), officially the Commonwealth of Puerto Rico, is a self-governing Caribbean archipelago and island organized as an unincorporated territory of the United States under the designation of commonwealth. Located about 1,000 miles (1,600 km) southeast of Miami, Florida, between the Dominican Republic in the Greater Antilles and the U.S. Virgin Islands in the Lesser Antilles, it consists of the eponymous main island and numerous smaller islands, including Vieques, Culebra, and Mona. With approximately 3.2 million residents, it is divided into 78 municipalities, of which the most populous is the capital municipality of San Juan, followed by those within the San Juan metropolitan area. Spanish and English are the official languages of the government, though Spanish predominates.

Puerto Rico was settled by a succession of Amerindian peoples beginning 2,000 to 4,000 years ago; these included the Ortoiroid, Saladoid, and Taíno. It was claimed by Spain following the arrival of Christopher Columbus in 1493 and subsequently colonized by Juan Ponce de León in 1508. Puerto Rico was contested by other European powers into the 18th century but remained a Spanish possession for the next 400 years. The decline of the Indigenous population, followed by an influx of Spanish settlers, primarily from the Canary Islands and Andalusia, and African slaves vastly changed the cultural and demographic landscape of the archipelago. Within the Spanish Empire, Puerto Rico played a secondary but strategically significant role compared to larger and wealthier colonies like Peru and New Spain. By the late 19th century, a distinct Puerto Rican identity began to emerge, centered on a fusion of European, African, and Indigenous elements. In 1898, following the Spanish–American War, Puerto Rico was acquired by the United States.

In the history of the Americas, the pre-Columbian era, also known as the pre-contact era, or as the pre-Cabraline era specifically in Brazil, spans from the initial peopling of the Americas in the Upper Paleolithic to the onset of European colonization, which began with Christopher Columbus's voyage in 1492. This era encompasses the history of Indigenous cultures prior to significant European influence, which in some cases did not occur until decades or even centuries after Columbus's arrival.

During the pre-Columbian era, many civilizations developed permanent settlements, cities, agricultural practices, civic and monumental architecture, major earthworks, and complex societal hierarchies. Some of these civilizations had declined by the time of the establishment of the first permanent European colonies, around the late 16th to early 17th centuries, and are known primarily through archaeological research of the Americas and oral histories. Other civilizations, contemporaneous with the colonial period, were documented in European accounts of the time. For instance, the Maya civilization maintained written records, which were often destroyed by Christian Europeans such as Diego de Landa, who viewed them as pagan but sought to preserve native histories. Despite the destruction, a few original documents have survived, and others were transcribed or translated into Spanish, providing modern historians with valuable insights into ancient cultures and knowledge.

Mesoamerica is a historical region and cultural area comprising the present day lands of central and southern Mexico, all of Belize, Guatemala, El Salvador, western Honduras, and the Greater Nicoya region of Nicaragua and Costa Rica. As a cultural area, Mesoamerica is defined by a mosaic of cultural traits developed and shared by its indigenous cultures.

In the pre-Columbian era, many indigenous societies flourished in Mesoamerica for more than 3,000 years before the Spanish colonization of the Americas began on Hispaniola in 1493. In world history, Mesoamerica was the site of two historical transformations: (i) primary urban generation, and (ii) the formation of New World cultures from the mixtures of the indigenous Mesoamerican peoples with the European, African, and Asian peoples who were introduced by the Spanish colonization of the Americas. Mesoamerica is one of the six areas in the world where ancient civilization arose independently (see cradle of civilization), and the second in the Americas, alongside the Caral–Supe in present-day Peru. Mesoamerica is also one of only five regions of the world where writing is known to have independently developed (the others being ancient Egypt, India, Sumer, and China).

Barbados is an island country in the Caribbean located in the Atlantic Ocean. It is part of the Lesser Antilles of the West Indies and the easternmost island of the Caribbean region. It lies on the boundary of the South American and Caribbean plates. Its capital and largest city is Bridgetown.

Inhabited by Kalinago people since the 13th century, and prior to that by other Indigenous peoples, Barbados was claimed for the Crown of Castile by Spanish navigators in the late 15th century. It first appeared on a Spanish map in 1511. The Portuguese Empire claimed the island between 1532 and 1536, but abandoned it in 1620 with their only remnants being the introduction of wild boars intended as a supply of meat whenever the island was visited. An English ship, the Olive Blossom, arrived in Barbados on 14 May 1625; its men took possession of the island in the name of King James I. In 1627, the first permanent settlers arrived from England, and Barbados became an English and later British colony. During this period, the colony operated on a plantation economy, relying initially on the labour of Irish indentured servants and subsequently African slaves who worked on the island's plantations. Slavery continued until it was phased out through most of the British Empire by the Slavery Abolition Act 1833.

During the Age of Discovery, a large scale colonization of the Americas, involving European countries, took place primarily between the late 15th century and early 19th century. The Norse settled areas of the North Atlantic, colonizing Greenland and creating a short-term settlement near the northern tip of Newfoundland circa 1000 AD. However, due to its long duration and importance, the later colonization by Europeans, after Christopher Columbus’s voyages, is more well-known. During this time, the European colonial empires of Spain, Portugal, Great Britain, France, Russia, the Netherlands, Denmark, and Sweden began to explore and claim the Americas, its natural resources, and human capital, leading to the displacement, disestablishment, enslavement, and genocide of the Indigenous peoples in the Americas, and the establishment of several settler colonial states.

The rapid rate at which some European nations grew in wealth and power was unforeseeable in the early 15th century because it had been preoccupied with internal wars and it was slowly recovering from the loss of population caused by the Black Death. The Ottoman Empire's domination of trade routes to Asia prompted Western European monarchs to search for alternatives, resulting in the voyages of Christopher Columbus and his accidental arrival at the New World. With the signing of the Treaty of Tordesillas in 1494, Portugal and Spain agreed to divide the Earth in two, with Portugal having dominion over non-Christian lands in the world's eastern half, and Spain over those in the western half. Spanish claims essentially included all of the Americas; however, the Treaty of Tordesillas granted the eastern tip of South America to Portugal, where it established Brazil in the early 1500s, and the East Indies to Spain, where It established the Philippines. The city of Santo Domingo, in the current-day Dominican Republic, founded in 1496 by Columbus, is credited as the oldest continuously inhabited European-established settlement in the Americas.

A cereal is a grass cultivated for its edible grain. Cereals are the world's largest crops, and are therefore staple foods. They include rice, wheat, rye, oats, barley, millet, and maize (corn). Edible grains from other plant families, such as amaranth, buckwheat and quinoa, are pseudocereals. Most cereals are annuals, producing one crop from each planting, though rice is sometimes grown as a perennial. Winter varieties are hardy enough to be planted in the autumn, becoming dormant in the winter, and harvested in spring or early summer; spring varieties are planted in spring and harvested in late summer. The term cereal is derived from the name of the Roman goddess of grain crops and fertility, Ceres.

Cereals were domesticated in the Neolithic around 8,000 years ago. Wheat and barley were domesticated in the Fertile Crescent. Rice and some millets were domesticated in East Asia, while sorghum and other millets were domesticated in West Africa. Maize was domesticated by Indigenous peoples of the Americas in southern Mexico about 9,000 years ago. In the 20th century, cereal productivity was greatly increased by the Green Revolution. This increase in production has accompanied a growing international trade, with some countries producing large portions of the cereal supply for other countries.

Colombia, officially the Republic of Colombia, is a country primarily located in South America with insular regions in North America. The Colombian mainland is bordered by the Caribbean Sea to the north, Venezuela to the east and northeast, Brazil to the southeast, Peru and Ecuador to the south and southwest, the Pacific Ocean to the west, and Panama to the northwest. Colombia is divided into 32 departments. The Capital District of Bogotá is also the country's largest city hosting the main financial and cultural hub. Other major urban areas include Medellín, Cali, Barranquilla, Cartagena, Santa Marta, Cúcuta, Ibagué, Villavicencio and Bucaramanga. It covers an area of 1,141,748 square kilometers (440,831 sq mi) and has a population of around 52 million. Its rich cultural heritage—including language, religion, cuisine, and art—reflects its history as a colony, fusing cultural elements brought by immigration from Europe and the Middle East, with those brought by the African diaspora, as well as with those of the various Indigenous civilizations that predate colonization. Spanish is the official language, although Creole, English and 64 other languages are recognized regionally.

Colombia has been home to many indigenous peoples and cultures since at least 12,000 BCE. The Spanish first landed in La Guajira in 1499, and by the mid-16th century, they had colonized much of present-day Colombia, and established the New Kingdom of Granada, with Santa Fe de Bogotá as its capital. Independence from the Spanish Empire is considered to have been declared in 1810, with what is now Colombia emerging as the United Provinces of New Granada. After a brief Spanish reconquest, Colombian independence was secured and the period of Gran Colombia began in 1819. The new polity experimented with federalism as the Granadine Confederation (1858) and then the United States of Colombia (1863), before becoming a centralised republic—the current Republic of Colombia—in 1886. With the backing of the United States and France, Panama seceded from Colombia in 1903, resulting in Colombia's present borders. Beginning in the 1960s, the country has suffered from an asymmetric low-intensity armed conflict and political violence, both of which escalated in the 1990s. Since 2005, there has been significant improvement in security, stability, and rule of law, as well as unprecedented economic growth and development. Colombia is recognized for its healthcare system, being the best healthcare in Latin America according to the World Health Organization and 22nd in the world. Its diversified economy is the third-largest in South America, with macroeconomic stability and favorable long-term growth prospects.

Bolivia, officially the Plurinational State of Bolivia, is a landlocked country located in central South America. The country features diverse geography, including vast Amazonian plains, tropical lowlands, mountains, the Gran Chaco, warm valleys, high-altitude Andean plateaus, and snow-capped peaks, encompassing a wide range of climates and biomes across its regions and cities. It includes part of the Pantanal, the largest tropical wetland in the world, along its eastern border. It is bordered by Brazil to the north and east, Paraguay to the southeast, Argentina to the south, Chile to the southwest, and Peru to the west. The seat of government is La Paz, which contains the executive, legislative, and electoral branches of government, while the constitutional capital is Sucre, the seat of the judiciary. The largest city and principal industrial center is Santa Cruz de la Sierra, located on the Llanos Orientales (eastern tropical lowlands), a mostly flat region in the east of the country with a diverse non-Andean culture.

The sovereign state of Bolivia is a constitutionally unitary state divided into nine departments. Its geography varies as the elevation fluctuates, from the western snow-capped peaks of the Andes to the eastern lowlands, situated within the Amazon basin. One-third of the country is within the Andean mountain range. With an area of 1,098,581 km (424,164 sq mi), Bolivia is the fifth-largest country in South America after Brazil, Argentina, Peru and Colombia, and, alongside Paraguay, is one of two landlocked countries in the Americas. It is the largest landlocked country in the Southern Hemisphere. Bolivia had a population of 11.4 million as of the latest census in 2024. It is multiethnic, including Amerindians, Mestizos, and the descendants of Europeans and Africans. Spanish is the official and predominant language, although 36 indigenous languages also have official status, of which the most commonly spoken are Guaraní, Aymara, and Quechua.

The Spanish colonization of the Americas began in 1493 on the Caribbean island of Hispaniola (now Haiti and the Dominican Republic) after the initial 1492 voyage of Genoese mariner Christopher Columbus under license from Queen Isabella I of Castile. These overseas territories of the Spanish Empire were under the jurisdiction of Crown of Castile until the last territory was lost in 1898. Spaniards saw the dense populations of Indigenous peoples as an important economic resource and the territory claimed as potentially producing great wealth for individual Spaniards and the crown. Religion played an important role in the Spanish conquest and incorporation of indigenous peoples, bringing them into the Catholic Church peacefully or by force. The crown created civil and religious structures to administer the vast territory. Spanish men and women settled in greatest numbers where there were dense indigenous populations and the existence of valuable resources for extraction.

The Spanish Empire claimed jurisdiction over the New World in the Caribbean and North and South America, with the exception of Brazil, ceded to Portugal by the Treaty of Tordesillas. Other European powers, including England, France, and the Dutch Republic, took possession of territories initially claimed by Spain. Although the overseas territories under the jurisdiction of the Spanish crown are now commonly called "colonies" the term was not used until the second half of 18th century. The process of Spanish settlement, now called "colonization" and the "colonial era" are terms contested by scholars of Latin America and more generally.

The Spanish conquest of the Aztec Empire was a pivotal event in the history of the Americas, marked by the collision of the Aztec Triple Alliance and the Spanish Empire, with the latter being supported by its Indigenous allies. Taking place between 1519 and 1521, this event saw the Spanish conquistador Hernán Cortés, and his small army of European soldiers and numerous Indigenous allies, overthrowing one of the most powerful empires in Mesoamerica.

Led by the Aztec ruler Moctezuma II, the Aztec Empire had established dominance over central Mexico through military conquest and intricate alliances. Because the Aztec Empire ruled via hegemonic control by maintaining local leadership and relying on the psychological perception of Aztec power—backed by military force—the Aztecs normally kept subordinate rulers compliant. This was an inherently unstable system of governance, as this situation could change with any alteration in the status quo. A combination of factors including superior weaponry, strategic alliances with oppressed or otherwise dissatisfied or opportunistic Indigenous populations, and the impact of European diseases contributed to the downfall of the short rule of the Aztec civilization. In 1520, the first wave of smallpox killed 5–8 million people.

The Saladoid culture is a pre-Columbian Indigenous culture of territory in present-day Venezuela and the Caribbean that flourished from 500 BCE to 545 CE. Concentrated along the lowlands of the Orinoco River, the people migrated by sea to the Lesser Antilles, and then to Puerto Rico.

Population figures for the Indigenous peoples of the Americas before European colonization have been difficult to establish. Estimates have varied widely from as low as 8 million to as many as 100 million, though by the end of the 20th Century, many scholars gravitated toward an estimate of around 50 million people.

The monarchs of the nascent Spanish Empire decided to fund Christopher Columbus' voyage in 1492, leading to the establishment of colonies and marking the beginning of the migration of millions of Europeans and Africans to the Americas. While the population of European settlers, primarily from Spain, Portugal, France, England, and the Netherlands, along with African slaves, grew steadily, the Indigenous population plummeted. There are numerous reasons for the population decline, including exposure to Eurasian diseases such as influenza, pneumonic plagues, and smallpox; direct violence by settlers and their allies through war and forced removal; and the general disruption of societies. Scholarly disputes remain over the degree to which each factor contributed or should be emphasized; some modern scholars have categorized it as a genocide, claiming that deliberate, systematic actions by Europeans were the primary cause. Traditional interpretation of the decline by scholars have disputed this characterization, maintaining that incidental disease exposure was the primary cause. This is supported by evidence where 50-80 percent of the population died from waves of diseases caused by Europeans in places such as Mexico in the 16th century.

Illinois (/ˌɪlɪˈnɔɪ/ IL-ih-NOY) is a state in the Midwestern region of the United States. It borders Lake Michigan to its northeast, the Mississippi River to its west, and the Wabash and Ohio rivers to its south. Of the fifty U.S. states, Illinois has the fifth-largest gross domestic product (GDP), the sixth-largest population, and the 25th-most land area. Its capital city is Springfield in the center of the state, and the state's largest city is Chicago in the northeast.

Present-day Illinois was inhabited by Indigenous cultures for thousands of years. The French were the first Europeans to arrive, settling near the Mississippi and Illinois rivers in the 17th century Illinois Country, as part of their sprawling colony of New France. A century later, the revolutionary war Illinois campaign prefigured American involvement in the region. Following U.S. independence in 1783, which made the Mississippi River the national boundary, American settlers began arriving from Kentucky via the Ohio River. Illinois was soon part of the United States' oldest territory, the Northwest Territory, and in 1818 it achieved statehood. The Erie Canal brought increased commercial activity in the Great Lakes, and the invention of the self-scouring steel plow by Illinoisan John Deere turned the state's rich prairie into some of the world's most productive and valuable farmland, attracting immigrant farmers from Germany, Sweden and elsewhere. In the mid-19th century, the Illinois and Michigan Canal and a sprawling railroad network facilitated trade, commerce, and settlement, making the state a transportation hub for the nation, especially in the city of Chicago, which became the world's fastest growing city by the late 19th century. By 1900, the growth of industrial jobs in the northern cities and coal mining in the central and southern areas attracted immigrants from Eastern and Southern Europe. Illinois became one of America's most industrialized states and remains a major manufacturing center. The Great Migration from the South established a large Black community, particularly in Chicago, which became a leading cultural, economic, and population center; its metropolitan area, informally referred to as Chicagoland, holds about 65% of the state's 12.8 million residents.

The archaeology of the Western Hemisphere, including North America (Mesoamerica), Central America, South America and the Caribbean, includes the study of pre-historic/pre-Columbian and historic indigenous American peoples, as well as historical archaeology of more recent eras, including the trans-Atlantic slave trade and European colonization.

A planned community, planned city, planned town, or planned settlement is any community that was carefully planned from its inception and is typically constructed on previously undeveloped land. This contrasts with settlements that evolve organically.

The term new town refers to planned communities of the new towns movement in particular, mainly in the United Kingdom. It was also common in the European colonization of the Americas to build according to a plan either on fresh ground or on the ruins of earlier Native American villages.

The Columbian exchange, also known as the Columbian interchange, was the widespread transfer of plants, animals, and diseases between the New World (the Americas) in the Western Hemisphere, and the Old World (Afro-Eurasia) in the Eastern Hemisphere, from the late 15th century on. It is named after the explorer Christopher Columbus and is related to the European colonization and global trade following his 1492 voyage. Some of the exchanges were deliberate while others were unintended. Communicable diseases of Old World origin resulted in an 80 to 95 percent reduction in the Indigenous population of the Americas from the 15th century onwards, and their near extinction in the Caribbean.

The cultures of both hemispheres were significantly impacted by the migration of people, both free and enslaved, from the Old World to the New. European colonists and African slaves replaced Indigenous populations across the Americas, to varying degrees. The number of Africans taken to the New World was far greater than the number of Europeans moving there in the first three centuries after Columbus.

The human history of the Americas is thought to begin with people migrating to these areas from Asia during the height of an ice age. These groups are generally believed to have been isolated from the people of the "Old World" until the coming of Europeans in 1492 with the voyages of Christopher Columbus.

The ancestors of today's American Indigenous peoples were the Paleo-Indians; they were hunter-gatherers who migrated into North America. The most popular theory asserts that migrants came to the Americas via Beringia, the land mass now covered by the ocean waters of the Bering Strait. Small lithic stage peoples followed megafauna like bison, mammoth (now extinct), and caribou, thus gaining the modern nickname "big-game hunters." Groups of people may also have traveled into North America on shelf or sheet ice along the northern Pacific coast.