Map: All of the World’s Borders by Age
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All of the World’s Borders by Age
To view the full resolution version of this massive map, click here.
Defined borders are a relatively new concept in many parts of the world. In fact, until the latter half of the 20th century, most of the world was still wide open territory with loosely or completely undefined borders.
On the European continent, however, jurisdiction over territory has been a fact of life for thousands of years. In some cases, they’ve left a paper trail. In other cases, there are more concrete remnants. For example, over 3,000 miles (5,000 km) of simple frontier fortifications – known as limes – marked the edges of the Roman Empire at its greatest extent in the 2nd century.
Over time, as territorial jurisdiction changed hands through war, marriage, and other arrangements, the map has been redrawn countless times. The video below demonstrates just how dramatically many of Europe’s dividing lines have shifted (even as recently as the 1990s).
Even today, borders are far from set in stone. Belgium and the Netherlands recently swapped land in order to simplify an overly complex piece of their border along a river. Also, India and Bangladesh worked together to solve a notoriously complicated situation involving enclaves within enclaves.
The Difficulty in Date Stamping Dividing Lines
Creating a map that shows the age of all the world’s borders seems like an impossible feat, but Reddit user, PisseGuri82, was up to the challenge. PisseGuri82, acknowledging the extreme complexity of the undertaking, outlined some caveats to consider:
– The map looks at the date a border was officially set to its current form (excluding minute changes).
– The dates are derived from publicly available border treaties and documents.
– Exact dates are difficult to pin down as ratification, surveying, and physical marking can take place over a number of years.
These issues aside, the final product is a fascinating look at how we’ve divided the world up into nations. Here are some highlights from the map:
In contrast to the patchwork of territories left in the wake of the Holy Roman Empire, the southwest part of Europe has remained remarkably static. The border dividing Spain and Andorra, weaving its way through the rocky Pyrenees mountain range, has remained unchanged since 1278, when a feudal charter solidified Andorra’s geography. The Portugal–Spain border has been in place since 1297.
War and Pieces
Many of the oldest borders in the world were established by treaties following a war. One particularly noteworthy example is the border between Iraq and Turkey, which was established by the Treaty of Zuhab (1639) following the sack of Baghdad by the Ottoman Empire.
The Legacy of the “Scramble for Africa”
It’s remarkable to note that a full third of the world’s borders are less than 100 years old. This is especially apparent in Africa, where many existing borders still resemble those haphazardly set by colonial powers around the turn of the 20th century. The average border on the continent is only 111 years old.
We have been giving away mountains and rivers and lakes to each other, only hindered by the small impediment that we never knew exactly where the mountains and rivers and lakes were.
-Lord Salisbury, British PM in 1890
In 1964, independent African states chose to maintain colonial borders, primarily to prevent widespread conflict over territory. Though colonial divisions were maintained in theory, only about one third of Africa’s 51,000 miles (83,000 km) of land borders are demarcated – an issue that continues to cause headaches today. For example, South Sudan has numerous border conflicts with neighbors; a situation that is complicated by the presence of natural resources.
A recent study pointed out that the likelihood of conflict in Africa is approximately 40% higher in areas where “partitioned ethnicities reside, as compared to homelands of ethnicities that have not been separated by national borders”.
There are seven sovereign states with pie-slice-shaped territorial claims in Antarctica. It’s worth noting that the claims have been recognized only between the countries making claims. There is currently a treaty in place that preserves freedom of scientific investigation and bans military activity on the continent.
Saudi Arabia’s Lines in the Sand
Saudi Arabia’s oldest border section – shared with Kuwait – is a remnant of the Uqair Convention circa 1922, but most of its international borders were established in the latter part of the 20th century. The Yemen–Saudi border was only officially demarcated in the year 2000, and a 1,100 miles (1,800 km) border fence soon followed.
Where will lines Shift next?
Where there is a war and upheaval, border changes often follow. Syria’s descent into chaos and the annexation of Crimea are two situations which could result in new international borders. Breakaway states – an independent Catalan state, for example – are always a possibility as well.
For now, the most likely changes to borders will continue be minor adjustments to fix lawless gaps between nations. These corrections are rarely easy to negotiate, but irregularities, like the one that led to founding of Liberland, can cause even bigger headaches for governments and local officials.
Mapped: What Did the World Look Like in the Last Ice Age?
A map of the Earth 20,000 years ago, at the peak of the last ice age, when colder temperatures transformed the planet we know so well.
What Did the World Look Like in the Last Ice Age?
What did the world look like during the last ice age? Was it all endless glaciers and frozen ice? The answer is a partial yes—with some interesting caveats.
The Last Glacial Maximum (LGM), colloquially called the last ice age, was a period in Earth’s history that occurred roughly 26,000 to 19,000 years ago.
This map by cartographer Perrin Remonté offers a snapshot of the Earth from that time, using data of past sea levels and glaciers from research published in 2009, 2014, and 2021, alongside modern-day topographical data.
Let’s dive into the differences between the two Earths below.
The Last Ice Age: Low Seas, Exposed Landmasses
During an ice age, sea levels fall as ocean water that evaporates is stored on land on a large scale (ice sheets, ice caps, glaciers) instead of returning to the ocean.
|Earth's Ice Cover||20,000 Years Ago||Today|
At the time of the LGM, the climate was cold and dry with temperatures that were 6 °C (11 °F) lower on average. Water levels in the ocean were more than 400 feet below what they are now, exposing large areas of the continental shelf.
In the map above, these areas are represented as the gray, dry land most noticeable in a few big patches in Southeast Asia and between Russia and Alaska. Here are a few examples of regions of dry land from 20,000 years ago that are now under water:
- A “lost continent” called Sundaland, a southeastern extension of Asia which forms the island regions of Indonesia today. Some scholars see a connection with this location and the mythical site of Atlantis, though there are many other theories.
- The Bering land bridge, now a strait, connecting Asia and North America. It is central to the theory explaining how ancient humans crossed between the two continents.
- Another land bridge connected the island of Great Britain with the rest of continental Europe. The island of Ireland is in turn connected to Great Britain by a giant ice sheet.
- In Japan, the low water level made the Sea of Japan a lake, and a land bridge connected the region to the Asian mainland. The Yellow Sea—famous as a modern-day fishing location—was completely dry.
The cold temperatures also caused the polar parts of continents to be covered by massive ice sheets, with glaciers forming in mountainous areas.
Flora and Fauna in the Last Ice Age
The dry climate during the last ice age brought about the expansion of deserts and the disappearance of rivers, but some areas saw increased precipitation from falling temperatures.
Most of Canada and Northern Europe was covered with large ice sheets. The U.S. was a mix of ice sheets, alpine deserts, snow forests, semi-arid scrubland and temperate grasslands. Areas that are deserts today—like the Mojave—were filled with lakes. The Great Salt Lake in Utah is a remnant from this time.
Africa had a mix of grasslands in its southern half and deserts in the north—the Sahara Desert existed then as well—and Asia was a mix of tropical deserts in the west, alpine deserts in China, and grasslands in the Indian subcontinent.
Several large animals like the woolly mammoth, the mastodon, the giant beaver, and the saber-toothed tiger roamed the world in extremely harsh conditions, but sadly all are extinct today.
However, not all megafauna from the LGM disappeared forever; many species are still alive, including the Bactrian camel, the tapir, the musk ox, and the white rhinoceros—though the latter is now an endangered species.
Will There Be Another Ice Age?
In a technical sense, we’re still in an “ice age” called the Quaternary Glaciation, which began about 2.6 million years ago. That’s because a permanent ice sheet has existed for the entire time, the Antarctic, which makes geologists call this entire period an ice age.
We are currently in a relatively warmer part of that ice age, described as an interglacial period, which began 11,700 years ago. This geological epoch is known as the Holocene.
Over billions of years, the Earth has experienced numerous glacial and interglacial periods and has had five major ice ages:
|Major Ice Ages||Name||Time Period (Years Ago)|
|1||Huronian Glaciation||2.4 billion - 2.1 billion|
|2||Cryogenian Glaciation||720 million - 635 million|
|3||Andean-Saharan Glaciation||450 million - 420 million|
|4||Late Paleozoic ice age||335 million - 260 million|
|5||Quaternary Glaciation||2.6 million - present|
It is predicted that temperatures will fall again in a few thousand years, leading to expansion of ice sheets. However there are a dizzying array of factors that are still not understood well enough to say comprehensively what causes (or ends) ice ages.
A popular explanation says the degree of the Earth’s axial tilt, its wobble, and its orbital shape, are the main factors heralding the start and end of this phenomenon.
The variations in all three lead to a change in how much prolonged sunlight parts of the world receive, which in turn can cause the creation or melting of ice sheets. But these take thousands of years to coincide and cause a significant change in climate.
Furthermore, current industrial activities have warmed the climate considerably and may in fact delay the next ice age by 50,000-100,000 years.
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