North America

North America is a continent in the Northern and Western hemispheres. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Caribbean Sea, and to the south and west by the Pacific Ocean. North America covers an area of around 24,709,000 square kilometers (9,540,000 square miles), representing approximately 16 % of Earth's land area and 4 % of its total surface area. It is the third-largest continent by size after Asia and Africa, and the fourth-largest continent by population after Asia, Africa, and Europe. As of 2021, North America's population is estimated at over 592 million people in 23 independent states and territories, or about 7 % of the world's population. The continent includes the subregions of Northern America (comprising Canada, Greenland, and the continental United States as well as the insular territories of Bermuda and Saint Pierre and Miquelon) and Middle America (comprising Mexico, Central America and the Caribbean). In human geography, the terms "North America" and "North American" often refer to just Northern America. It is unknown exactly how and when the first human populations reached North America. People are known to have lived in the Americas at least 20,000 years ago, but various evidence points to possibly earlier dates. The Paleo-Indian period in North America followed the Last Glacial Period, and lasted until about 10,000 years ago when the Archaic period began. The classic stage followed the Archaic period, and lasted from approximately the 6th to 13th centuries. Norse exploration and colonization began in the late 10th century; the Norse built several settlements in Greenland and at least one settlement in Newfoundland. Beginning in 1492, the voyages of Christopher Columbus led to a transatlantic exchange, including migrations of European settlers during the Age of Discovery and the early modern period. Present-day cultural and ethnic patterns reflect interactions between early European colonists, indigenous peoples, enslaved Africans, later immigrants from Europe and Asia, and descendants of these respective groups. European colonization has led to most North Americans speaking European languages (such as English, Spanish, and French) and the cultures of the region commonly reflect Western traditions. However, there remain significant indigenous populations that continue to adhere to their respective pre-colonial cultural and linguistic traditions.