North America

"North America. Can't explain. It's home to one of the greatest countries of all time... the USA, plus they've got it's two neighbors bordering on top and on bottom: Canada and Mexico."

--Su Ji-Hoon, Lily's Wish

North America is a continent entirely within the Northern Hemisphere and almost all within the Western Hemisphere; it is also considered by some to be a northern subcontinent of the Americas. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the west and south by the Pacific Ocean, and to the southeast by South America and the Caribbean Sea.

North America covers an area of about 24,709,000 square kilometers (9,540,000 square miles), about 16.5% of the earth's land area and about 4.8% of its total surface. North America is the third largest continent by area, following Asia and Africa, and the fourth by population after Asia, Africa, and Europe. In 2013, its population was estimated at nearly 565 million people in 23 independent states, or about 7.5% of the world's population, if nearby islands (most notably the Caribbean) are included.

North America was reached by its first human populations during the last glacial period, via crossing the Bering land bridge approximately 40,000 to 17,000 years ago. The so-called Paleo-Indian period is taken to have lasted until about 10,000 years ago (the beginning of the Archaic or Meso-Indian period). The Classic stage spans roughly the 6th to 13th centuries. The Pre-Columbian era ended with the transatlantic migrations and the arrival of European settlers during the Age of Discovery and the Early Modern period. Present-day cultural and ethnic patterns reflect different kind of interactions between European colonists, indigenous peoples, African slaves and their descendants.

European influences are strongest in the northern parts of the continent while indigenous and African influences are relatively stronger in the south. Because of the history of colonialism, most North Americans speak English, Spanish or French and societies and states commonly reflect Western traditions.

Name
The Americas are usually accepted as having been named after the Italian explorer Amerigo Vespucci by the German cartographers Martin Waldseemüller and Matthias Ringmann. Vespucci, who explored South America between 1497 and 1502, was the first European to suggest that the Americas were not the East Indies, but a different landmass previously unknown by Europeans. In 1507, Waldseemüller produced a world map, in which he placed the word "America" on the continent of South America, in the middle of what is today Brazil. He explained the rationale for the name in the accompanying book Cosmographiae Introductio, and including in Lily's Wish, as said by Su Ji-Hoon:

"Ab Americo inventore... quasi Americi terram sive Americam. It means from Americus the discoverer... as if it were the land of Americus, thus America."

--Su Ji-Hoon, Lily's Wish

For Waldseemüller, no one should object to the naming of the land after its discoverer. He used the Latinized version of Vespucci's name (Americus Vespucius), but in its feminine form "America", following the examples of "Europa," "Asia" and "Africa."

Later, other mapmakers extended the name America to the northern continent, In 1538, Gerard Mercator used America on his map of the world for all the Western Hemisphere.

Some argue that the convention is to use the surname for naming discoveries except in the case of royalty and so a derivation from "Amerigo Vespucci" could be problematic. Ricardo Palma (1949) proposed a derivation from the "Amerrique" mountains of Central America—Vespucci was the first to discover South America and the Amerrique mountains of Central America, which connected his discoveries to those of Christopher Columbus.

Alfred E. Hudd proposed a theory in 1908 that the continents are named after a Welsh merchant named Richard Amerike from Bristol, who is believed to have financed John Cabot's voyage of discovery from England to Newfoundland in 1497. A minutely explored belief that has been advanced is that America was named for a Spanish sailor bearing the ancient Visigothic name of 'Amairick.' Another is that the name is rooted in a Native American language.

Extent
The term North America maintains various definitions in accordance with location and context. In Canadian English, North America may be used to refer to the United States and Canada together. Alternatively, usage sometimes includes Greenland and Mexico (as in the North American Free Trade Agreement), as well as offshore islands. The UN geoscheme for "North America" separates Mexico from the United States and Canada, placing it instead within its designated "Central America" region, while also treating the islands of the Caribbean separately from the US/Canada definition—the UN's "North America" definition still includes the Canadian Arctic Archipelago and Greenland together with the US/Canada continental definition, with both insular entities being tectonically on the North American plate. In France, Italy, Portugal, Spain, Romania, Greece, and the countries of Latin America, the cognates of North America usually designate a subcontinent of the Americas comprising Canada, the United States, and Mexico, and often Greenland, Saint Pierre and Miquelon, and Bermuda.

North America has been historically referred to by other names. Spanish North America (New Spain) was often referred to as Northern America, and this was the first official name given to Mexico.

Regions
Geographically the North American continent has many regions and subregions. These include cultural, economic, and geographic regions. Economic regions included those formed by trade blocs, such as the North American Trade Agreement bloc and Central American Trade Agreement. Linguistically and culturally, the continent could be divided into Anglo-America and Latin America. Anglo-America includes most of Northern America, Belize, and Caribbean islands with English-speaking populations (though sub-national entities, such as Louisiana and Quebec, are Francophone in composition). The southern North American continent is composed of two regions. These are Central America and the Caribbean. The north of the continent maintains recognized regions as well. In contrast to the common definition of "North America", that which encompasses the whole continent, the term "North America" is also used to refer to Canada, Mexico, the United States, and Greenland.

The term Northern America refers to the northern-most countries and territories of North America, Canada, the United States, Greenland, Bermuda, and St. Pierre and Miquelon. Although rarely used, the term Middle America—not to be confused with the Midwestern United States—groups the regions of Central America, the Caribbean, and Mexico.

The largest countries of the continent, Canada and the United States, also contain well-defined and recognized regions. In the case of Canada these are the British Columbia Coast, Canadian Prairies, Central Canada, Atlantic Canada, and Northern Canada. These regions also contain many subregions. In the case of the United States – and in accordance with the US Census Bureau definitions – these regions are: New England, Mid-Atlantic, East North Central States, West North Central States, South Atlantic States, East South Central States, West South Central States, Mountain States, and Pacific States. Regions shared between both nations included the Great Lakes Region. Megalopolises have also formed between both nations in the case of the Pacific Northwest and the Great Lakes Megalopolis.