Today’s chart is best viewed full-screen. Explore the high resolution version by clicking here.
Sailors have been circumnavigating the high seas for centuries now, but what could be found beneath the sunlit surface of the ocean remained a mystery until far more recently. In fact, it wasn’t until 1875, during the Challenger expedition, that humanity got it’s first concete idea of how deep the ocean actually was.
Today’s graphic, another fantastic piece by xkcd, is a unique and entertaining look at everything from Lake Superior’s ice encrusted shoreline down to blackest, inhospitable trench (which today bears the name of the expedition that first discovered it).
The graphic is packed with detail, so we’ll only highlight a few points of interest.
Deep Thoughts with Lake Baikal
Deep in Siberia, abutting a mountainous stretch of the Mongolian border, is the one of the most remarkable bodies of water on Earth: Lake Baikal. There are a number of qualities that make Lake Baikal stand out.
Depth: Baikal, located in a massive continental rift, is the deepest lake in the world at 1,642m (5,387ft). That extreme depth holds a lot of fresh water. In fact, an estimated 22% of all the world’s fresh water can be found in the lake.
Age: Baikal (which is listed as a UNESCO World Heritage Site) is estimated to be over 25 million years old, making it the most ancient lake on the planet.
Clarity: Interestingly, the water in the lake is exceptionally clear. In winter, visibility can extend over 30m (98ft) below the surface.
Biodiversity: The unique ecosystem of Lake Baikal provides a home for thousands of plant and animal species. In fact, upwards of 80% of those species are endemic, meaning they are unique to that region.
Who is Alvin?
Since 1964, a hard-working research submersible named Alvin has been helping us better understand the deep ocean. Alvin explored the wreckage of RMS Titanic in 1986, and helped confirm the existence of black smokers (one of the weirdest ecosystems in the world). Though most of the components of the vessel have been replaced and upgraded over the years, it’s still in use today.
The ancient Greek word, ábyssos, roughly means “unfathomable, bottomless gulf”. While there is a bottom (the abyssopelagic zone comprises around 75% of the ocean floor), the enormous scale of this ecosystem is certainly unfathomable.
Objectively, the abyssal plain is not the prettiest part of the ocean. It’s nearly featureless, and lacks the panache of, say, a coral reef, but there are still some very compelling reasons we’re eager to explore it. Resource companies are chiefly interested in polymetallic nodules, which are essentially rich manganese formations scattered about on the sea bottom.
Manganese is already essential in steel production, but demand is also getting a substantial lift from the fast-growing electric vehicle market. The first company to find an economical way to harvest nodules from the ocean floor could reap a significant windfall.
Drill Baby, Drill
Demand for resources can force humans into some very inhospitable places, and in the case of Deepwater Horizon, we chased oil to a depth even surpassing the famed Marianas Trench.
Drilling that far below the surface is a complicated endeavor, and when the drill platform was put into service in 2001, it was hailed as an engineering marvel. To this day, Deepwater Horizon holds the record for the deepest offshore hole ever made.
After the rig’s infamous explosion and subsequent spill in 2010, that record may stand the test of time.
Animation: How the European Map Has Changed Over 2,400 Years
The history of Europe is breathtakingly complex, but this animation helps makes sense of 2,400 years of change on the European map.
How the European Map Has Changed Over 2,400 Years
The history of Europe is breathtakingly complex. While there are rare exceptions like Andorra and Portugal, which have had remarkably static borders for hundreds of years, jurisdiction over portions of the continent’s landmass have changed hands innumerable times.
Today’s video comes to us from YouTube channel Cottereau, and it shows the evolution of European map borders starting from 400 BC. Empires rise and fall, invasions sweep across the continent, and modern countries slowly begin to take shape (with the added bonus of an extremely dramatic instrumental).
Below are nine highlights and catalysts that shifted the dividing lines of the European map:
146 BC – A Year of Conquest
146 BC was a year of conquest and expansion for the Roman Republic. The fall of Carthage left the Romans in control of territory in North Africa, and the ransack and destruction of the Greek city-state of Corinth also kickstarted an era of Roman influence in that region. These decisive victories paved the way for the Roman Empire’s eventual domination of the Mediterranean.
117 AD – Peak Roman Empire
The peak of the Roman Empire is one of the more dramatic moments shown on this animated European map. At its height, under Trajan, the Roman Empire was a colossal 1.7 million square miles (quite a feat in an era without motorized vehicles and modern communication tools). This enormous empire remained mostly intact until 395, when it was irreparably split into Eastern and Western regions.
370 AD – The Arrival of the Huns
Spurred on by severe drought conditions in Central Asia, the Huns reached Europe and found a Roman Empire weakened by currency debasement, economic instability, overspending, and increasing incursions from rivals along its borders.
The Huns waged their first attack on the Eastern Roman Empire in 395, but it was not until half a century later—under the leadership of Attila the Hun—that hordes pushed deeper into Europe, sacking and razing cities along the way. The Romans would later get their revenge when they attacked the quarreling Goths and Huns, bouncing the latter out of Central Europe.
1241 – The Mongol Invasion of Europe
In the mid-13th century, the “Golden Horde” led by grandsons of Genghis Khan, roared into Russia and Eastern Europe sacking cities along the way. Facing invasion from formidable Mongol forces, central European princes temporarily placed their regional conflicts aside to defend their territory. Though the Mongols were slowly pushed eastward, they loomed large on the fringes of Europe until almost the 16th century.
1362 – Lithuania
Today, Lithuania is one of Europe’s smallest countries, but at its peak in the middle ages, it was one of the largest states on the continent. A pivotal moment for Lithuania came after a decisive win at the Battle of Blue Waters. This victory stifled the expansion of the Golden Horde, and brought present-day Ukraine into its sphere of influence.
1648 – Kleinstaaterei
The end of the Holy Roman Empire highlights the extreme territorial fragmentation in Germany and neighboring regions, in an era referred to as Kleinstaaterei.
Even as coherent nation states formed around it, the Holy Roman Empire and its remnants wouldn’t coalesce until Germany rose from the wreckage of the Franco-Prussian War in 1871. Unification helped position Germany as a major power, and by 1900 the country had the largest economy in Europe.
1919 – The Ottoman Empire
The Ottoman Empire—a fixture in Eastern Europe for hundreds of years—was in its waning years by the beginning of the 20th century. The empire had ceded territory in two costly wars with Italy and Balkan states, and by the time the dust cleared on WWI, the borders of the newly minted nation of Turkey began at the furthest edge of continental Europe.
1942 – Expanding and Contracting Germany
At the furthest extent of Axis territory in World War II, Germany and Italy controlled a vast portion of continental Europe. The map below shows occupied land and areas of influence at the height of Germany’s territorial expansion.
After the war, Germany again became fragmented into occupation zones—this time, overseen by the United States, France, Great Britain, and the Soviet Union. Germany would not be made whole again until 1990, when a weakening Soviet Union loosened its grip on East Germany.
1991 – Soviet Dissolution
In the decades following WWII, the political boundaries of the European map remained relatively stable—that is, until the dissolution of the Soviet Union in 1991. Almost overnight, the country’s entire western border splintered into independent nations. When the dust settled, there were 15 breakaway republics, six of which were in Europe.
Bonus: If you liked the video above, be sure to watch this year-by-year account of who ruled territories across Europe.
Mapped: Second Primary Languages Around the World
This fascinating map highlights the second most commonly spoken primary language in almost nearly every country.
Mapped: Second Primary Languages Around the World
After the primary language, what second languages are used as native tongues in your country?
The answer reveals a lot about history and location. Whether through immigration, colonization, or local culture, a primary language can either spread around the world or remain rooted in place.
This map from MoveHub shows the second most commonly spoken primary language in most countries, using data from the CIA World Factbook and Wikipedia as of February 2021.
The Difference Between Primary and Secondary Languages
First, it’s important to differentiate between primary languages and secondary languages.
A primary language—also known as a first or native language—is the language we use most frequently to communicate. These are languages we are usually born with, have a lot of exposure to, and use at home.
On the other hand, a secondary language is one we learn or pick up after our primary language. In many countries, English is the most commonly learned, with close to 1 billion speakers.
But a map of common second languages can simply show just how many countries prioritize learning English, the de-facto international language in many organizations. Instead, this map highlights the movement of people by showing the second-most common primary language.
The Second Most Common Primary Languages by Country
Even when filtering by primary language use, however, English and other Indo-European languages dominate the world.
With 55 countries speaking it as the second-most common primary language, English came out on top.
|Top 10 Most Popular Second Primary Languages||Number of Countries|
The use of English as a second primary language was primarily concentrated in Western Europe, Northern Africa, and Southeast Asia and Oceania.
Similarly to second-place French with 14 countries and third-place Russian with 13 countries, English was most common in proximity to English-speaking countries or where there was a history of immigration.
Other second-most common primary languages highlighted different cultures within countries, such as China’s second-most common language Cantonese. Alternatively, they showed the primary indigenous language before colonization, such as the Quechua languages in South America.
What other interesting or surprising language patterns can you spot in the map above?
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