Continents may be constantly shifting and changing, but to most people, their shapes are as recognizable as faces.
E. Dygas/Riser/Getty ImagesContinents are not the unchanging, universally recognized land masses of our elementary school studies. They were discovered by ocean-going explorers, sometimes with multiple people claiming the initial discovery. They were demarcated and named by men for political, often self-serving reasons. And they have shifted and changed shape over time. Our planet looks dramatically different than it did millions of years ago. But the continents as we know them now are an integral part of our geographical understanding of our world.
As important as geographical boundaries are for national and cultural identity, so do names count in our conception of who we are and where we come from. Imagine the confusion when the country you live in is actually positioned on two different continents, as is the case in more than one instance. This is one of the times when the term "Eurasia" comes in handy.
Even the number of continents is a subject of dispute. Different places in the world recognize different continents; the seven continents as taught in most of the West are only one way of looking at the continental geography of Earth. In this article, we'll learn about how the continents we know now -- Africa, Antarctica, Asia, Australia, Europe, North America and South America -- came about as distinct entities, find out different theories concerning where their names come from, see how our view of them has changed over the years, and learn why some of the continents don't even really fit the definition of "continent."
To begin, let's take a look at the world before there were any distinct continents at all. Scientists now believe that 200 million years ago, all of the land on Earth was connected in a single, unbroken mass surrounded by water -- a supercontinent. They call that ancient supercontinent Pangaea. The name is a logical choice. Find out why in the next section.
Before There Were Continents
The German geologist Alfred Wegener was the first to use the term Pangaea.
Imagno/Getty ImagesUntil the end of the Jurassic period, we could have walked from North America to Europe. Of course, there were no humans on Earth during the Jurassic period, and neither "North America" nor "Europe" existed yet. There was no ocean separating different land masses. The theory currently accepted by the scientific community is that a single land mass called Pangaea slowly separated by way of continental drift. This "supercontinent" was a true continent -- a single land mass surrounded by water.
Most of us now understand that there are plates shifting under the land we stand on. We see this shifting on the surface in the form of volcanoes and earthquakes. The study of these tectonic plates, though, is a relatively recent development. It began in earnest in 1915, when a German geologist named Alfred Wegener first published his theory that Earth's land masses are essentially floating on a molten layer of magma (see How Earthquakes Work).
Wegener was the first to use the term Pangaea. His work set forth the idea that 200 million years ago, there was a single land mass on Earth. "Pangaea" is Greek for "all lands" or "all-Earth." Pangaea was surrounded by a single ocean that covered the rest of the Earth. Over time, as the magma heated up the Earth's crust and caused fissures, the crust and the land above it drifted apart. It didn't immediately break up into the pieces that show up on today's maps. What we see now is the result of millions of years of drifting. Wegener believed that the first break resulted in just two continents, and successive breaks over time ultimately left us with the current geography of Earth.
If the theory of continental drift is true, then our current continents are temporary formations. The makeup of the Earth will continue to change as magma continues to affect the crust on which our continents sit.
The continents we see on our globes will be around for a while, though, and many of us still chant "North America, South America, Europe and Asia, Africa Australia, Antarctica" when we need to recall their names. So, how did those well-ingrained names come about? Who decided to honor explorer Amerigo Vespucci with a continent, and is America even named after him? Find out in the next section.
Continental NumbersAustralia/Oceania
Asia (largest)
North America
South America
Continents by Discovery
The origins of "America" are bit obscure. A dancer performs next to a globe during the UN Climate Change Conference in 2007.
Jewel Samad/AFP/Getty ImagesWhen it comes to the etymology of continent names, it seems logical that they would be named after the people who discovered them. In fact, the precise origins of the names are difficult to prove. In most cases, experts have only conjecture to go by, often drawn from early writings and maps. One notable exception is Antarctica.
It's surprising to have a modern newspaper article reporting the naming of a new continent; but in the case of Antarctica, we do. A New York Times article dated March 13, 1904, describes the naming of the frigid land at the South Pole [source: New York Times]. First described as a continent by Sir John Murray in the late 1800s, explorers confirmed the designation in 1904 and set about naming the latest addition to the map. Geographers took their cue from Murray, who had suggested "Antarctica," a combination of "ant" (opposite) and "arctic" (of the North Pole).
The origins of "America" are hazier. Most of us learned that the Americas were named after European explorer Amerigo Vespucci, who was the first to recognize the area as a previously unknown land mass. Christopher Columbus, until his death, believed he had come ashore at the East Indies. Vespucci, who came afterward, rightly believed Columbus had stumbled upon a different land altogether.
North and South America may indeed have been named for Vespucci; that's the most widely accepted theory. It makes sense: Amerigo Vespucci was the first to recognize that the land Columbus discovered was an entirely different continent. Also, the creator of the first known map to label the continent "America," German cartographer Martin Waldseemuller, actually explained that he was using the name in honor of Vespucci. This map is dated 1507.
Still, there are other theories. One states that the term comes from the Ameriqque mountains in Nicaragua. Experts believe that both Columbus and Vespucci visited these mountains after American natives clued them in that there was gold there. And gold is a significant driving force behind the discovery of new lands. A less convincing but more amusing theory ties the name to a British royal representative named Richard Amerike. Legend has it that the explorer John Cabot (who in 1497 was the first to sail to the New World under the English flag) received a very large reward upon his return to England, and it was Amerike who put it in his hands. The story goes that Cabot was so happy with the size of the reward that he named the continent for the man who gave it to him.
The name "Australia," for more concrete reasons, has likewise evolved into a bit of a mystery. Until recently, experts believed fairly definitively that the continent was named "Australia" by Matthew Flinders in 1802. Flinders was the first to circumnavigate the land mass, and he later created a map that named the continent Australia. The Latin "Australis" mean "southern." But now, experts aren't so sure it was Flinders who named the southern land mass. In the late 20th century, the National Library of Australia came upon a different document labeling the continent "Australia." This one was created by the German astronomer Cyriaco Jacob zum Barth in 1545.
Etymology is an inexact science, and the rest of the continent names have even hazier histories. The theories are very logical, though. Who can argue that Africa isn't "sunny" -- or, in Latin, "aprica"?
Vespucci's Bad RepSince the first use of the name "America," Amerigo Vespucci has been viewed as a bit of a scoundrel. Some think he stole discovery credit from Christopher Columbus; some even claim he changed his name to "Amerigo" only after the continent was referred to as "America."
Others think America got its name by mistake, and Vespucci had nothing to do with it. The first person to create a map with the name "America" on the newly discovered land may have misunderstood Vespucci's role in the discovery, possibly after misinterpreting a letter written by Vespucci years earlier.