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geography

The Wallace line divides the entire Malay Archipelago.

A fascinating biological phenomenon occurs between two islands in Indonesia. An invisible line divides the entire Malay Archipelago, and on the western side, the animal life is characteristic of Asia, featuring rhinos, elephants, tigers and woodpeckers.

Contrasting this, the eastern side of the islands presents a completely different ecological cast, boasting marsupials, Komodo dragons, cockatoos and honeyeaters, often associated with Australia.

The stark differences in biodiversity on the islands captured the keen eye of British naturalist Alfred Russel Wallace during his 19th-century travels through the East Indies. Even before the discovery of plate tectonics, Wallace postulated that the western islands must have once been interconnected and linked to the Asian mainland.


So, in 1859, he first sketched a line of demarcation between the zones which came to be known as the Wallace line.

The Invisible Barrier Keeping Two Worlds Apart

According to a video by PBS Eons, Wallace was onto something all those years ago. Researchers would later come to believe that the land masses on other sides of the line were once separate continents brought together by tectonic shifts.

“Today, we know them as the paleo continents of Sunda in the west and Sahul in the east, both of which existed during the ice ages when more water was locked up in ice and sea levels were lower. Wallace didn't know it, but while they’re pretty close now, the two partly-sunken continents used to be much, much further apart,” the video says. “So even though the species of each side are neighbors now, they’d been evolving separately for eons, their two worlds only colliding fairly recently in evolutionary terms.”

Is Atlanta really west of Detroit?

As the old saying goes, “the map is not the territory,” and sometimes maps can be misleading. David Blattman, head of production at Barstool Sports, shared four unbelievable facts about U.S. geography on Twitter, all of which appear to be wildly incorrect, but aren't.

“These geography facts have left me speechless,” Blattman wrote on Twitter.

  • Alaska is the northernmost, westernmost & easternmost state.
  • You can travel north, south, east, or west in Stamford, CT & the next state you hit is NY.
  • Reno is further west than LA.

  • Detroit is further east than Atlanta.

Each one of these bullet points deserves a fact check, but Snopes stepped in to make sense of the last one, which feels false. Is Detroit, a midwestern city, really east of Atlanta, a city that’s a 4-hour drive from the east coast?

Yes, Detroit is east of Atlanta.


“Atlanta is actually west of Detroit. Its coordinates are (emphasis added): 33.7488° N, 84.3877° W while Detroit's are 42.3314° N, 83.0458° W,” Bethania Palma at Snopes confirmed. The fact-checking site reached out to geographer Maria Lane for further comment.

She explained that our eyes are fooled by their locations because the east coast extends further east as it moves north. Conversely, in the south, the coast moves towards the west. This makes Atlanta appear to be much further east.

We are also fooled by how we’ve determined what’s “east coast” and what's "midwest.”

"So it shouldn't be any surprise that places on the southern 'east coast' are further west than places on the northern 'east coast,'" Lane wrote. "And northern places that we consider 'inland' or 'midwest' when compared to those far-north areas of the east coast, can still be relatively farther east than coast-adjacent places in the South."

This Tumblr post from @realtivegeography explains it perfectly.

https://www.tumblr.com/relativegeography/111177770466/atlanta-is-farther-west-than-detroit

So what about the other three hard-to-believe geographical facts?

Alaska is the northernmost, westernmost and easternmost state.

It makes sense that Alaska is the northernmost and westernmost state. It also has the title of easternmost because the Aleutian Islands arc right up to the edge of the Western Hemisphere and cross over into the Eastern Hemisphere. Alaska’s Semisopochnoi Island (179° East) is so far west it actually lies in the Eastern Hemisphere. Alaska’s Little Diomede island lies only 4 km from Big Diomede, a Russian territory. In the dead of winter, when the water around the island freezes, one can walk from the U.S. to Russia in under an hour.

https://mapsontheweb.zoom-maps.com/post/173359016889/due-to-the-aleutian-islands-alaska-is-the

You can travel north, south, east or west in Stamford, Connecticut, and the next state you hit is NY.

Blattman explained this perfectly in a tweet with a map showing how it works.

Reno is further west than Los Angeles.

How can Reno, Nevada, be west of Los Angeles, California? Los Angeles has beaches, and Reno is 128 miles from the coastline. Much like how the east coast recedes west as it heads south, the west coast does the same, pushing Los Angeles to the east of Reno.

reno nevada, los angeles california, west coast

Reno, Nevada in relation to Los Angeles, California.

via Google Maps

There's a big change at the 98th meridian.

Have you ever wondered why the eastern half of the United States is densely populated while everything west of Omaha, save for a few metro areas, is no man’s land?

Most people would assume that it’s because people first settled in the east and moved west. Or, they may believe it’s because of the vast desert that takes up most of the southwest. Those are some decent reasons, but it’s a much more complicated issue than you'd imagine.

A 20-minute video by RealLifeLore explains how topography and rainfall have created what appears to be a straight line down the middle of the country on the 98th meridian that dictates population density. Eighty percent of Americans live on the east side of the line and just twenty percent to the west.


RealLifeLore is a YouTube channel that focuses on geography and topography created by Joseph Pisenti.

In the video, we see that several large cities border the American frontier—San Antonio, Austin, Fort Worth, Oklahoma City, Wichita, Omaha, Lincoln, Sioux Falls and Fargo, as well as Winnipeg up in Canada. To the west of those cities? Not much until you reach western California and the Pacific Northwest.

Why? Watch:

The major reason why the population drastically changes is rainfall. It rains much more on the east side of the line versus the west. The reason for the drastic change in rainfall is that the Rocky Mountains create a colossal wall known as a rain shadow that prevents moisture from passing from the Pacific Ocean. This has created a large swath of dry land that’s not conducive to larger populations.

WikiImages/Canva

Here's why everything we think we know about continents is wrong.

Naming the seven continents is one of the first things young kids learn in school. Despite the fact that we forget most of what we learn, I'd wager that most American adults can still rattle off North America, South America, Africa, Asia, Europe, Australia (or Oceania, depending on how old you are) and Antarctica like it's nothing. Easy peasy.

Since knowing the continents appears to be a vital foundational part of our education, one might assume that there is a clear definition of what a continent actually is. Spoiler alert: There's not.

In fact, there isn't a single definition of "continent" that actually makes sense with what we teach as the continents, which is both fascinating and a little disturbing.


This fact is explored in a video by CGP Grey, an American-Irish YouTuber who brought us such informative delights as "Hexagons Are the Bestagons" and "The Better Boarding Method Airlines Won't Use."

In "What Are Continents?" Grey explains how the common definition of a continent for those of us in the English-speaking West—a large land mass separated from other land masses by a body of water—doesn't hold up due to Europe and Asia being considered different continents. But even if you were to combine Europe and Asia into Eurasia, which some places in the world do, you run into the problem of North and South America technically being one land mass (at least prior to the Panama Canal going in). But if you were to combine both Americas into one big American continent, you'd technically have to add Africa to Eurasia because the human-made Suez Canal is the only thing separating those land masses.

As you can see, it quickly starts to get complicated when we try to apply any amount of consistency to how we define a continent. Grey explains how one could make a compelling case for there being just three continents or dozens of them, depending on what parameters are being used to define them.

Watch everything you think you know about continents get dismantled like Pangaea in less than four minutes: