Its geologic structure is built around a stable platform of Precambrian rock called the Canadian (Laurentian) Shield. North America contains some of the oldest rocks on Earth. Some definitions of Middle America also include the West Indies. Some geographers characterize the area roughly from the southern border of the United States to the northern border of Colombia as Middle America, which differs from Central America because it includes Mexico. Greenland also is culturally divided from, but physically close to, North America. This cultural division is a very real one, yet Mexico and Central America (including the Caribbean) are bound to the rest of North America by strong ties of physical geography. To overcome this anomaly, the whole of Mexico, together with Central and South American countries, also may be grouped under the name Latin America, with the United States and Canada being referred to as Anglo-America. Under such a definition, part of Mexico must be included in Central America, although that country lies mainly in North America proper. According to some authorities, North America begins not at the Isthmus of Panama but at the narrows of Tehuantepec, with the intervening region called Central America. Those portions that widened out north of the Isthmus of Panama became known as North America, and those that broadened to the south became known as South America. Although at first the term America was applied only to the southern half of the continent, the designation soon was applied to the entire landmass. The name America is derived from that of the Italian merchant and navigator Amerigo Vespucci, one of the earliest European explorers to visit the New World. SpaceNext50 Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space!.Learn about the major environmental problems facing our planet and what can be done about them! Saving Earth Britannica Presents Earth’s To-Do List for the 21st Century.Britannica Beyond We’ve created a new place where questions are at the center of learning.100 Women Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians.
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COVID-19 Portal While this global health crisis continues to evolve, it can be useful to look to past pandemics to better understand how to respond today.Student Portal Britannica is the ultimate student resource for key school subjects like history, government, literature, and more.From tech to household and wellness products. Britannica Explains In these videos, Britannica explains a variety of topics and answers frequently asked questions.This Time in History In these videos, find out what happened this month (or any month!) in history.#WTFact Videos In #WTFact Britannica shares some of the most bizarre facts we can find.Demystified Videos In Demystified, Britannica has all the answers to your burning questions.Britannica Classics Check out these retro videos from Encyclopedia Britannica’s archives.
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