Mike Sowden Profile picture
Jun 28, 2022 15 tweets 6 min read Read on X
When my Zanclean Megaflood thread went nuts in February, some folk said "look into a thing called Atlantropa! It's just as mindblowing!"

They weren't wrong. And now I can't get *this* story out my head either.

So, once more, here we go.

1/
It's 1928.

This is German architect Herman Sörgel. Horrified by the First World War, keen to see everyone put down their weapons & actually, properly work together for a change, he's just had a idea that would solve *everything*.

He's going to drain the Mediterranean.

2/
No, really. It's simple!

All it would take is a series of dams:

- Across the Gibraltar Strait
- Across the Dardanelles to hold back the Black Sea
- Between Sicily and Tunisia, road-linking Europe & Africa
- At the Suez Canal.

Easy-peasy.

3/
By cutting off the Atlantic that replenishes it, Sörgel would engineer a new Messinian Salinity Crisis, the ancient event that dessicated the Mediterranean.

After a mere century or two, the western Med would have evaporate itself about 100m deeper than the Atlantic side...

4/
...and a hydroelectric dam across the 9 miles / 14 km wide Atlantic Strait would generate enough electricity for *everyone*.

Of course, it'd be the biggest dam in history, requiring more concrete than existed on Earth. And only be the first of five!

But Sörgel had a DREAM.

5/
If everyone ploughed their money into *this*, surely they wouldn't have enough left over to build armies, navies, air forces?

And their reward for cooperation was a bottomless renewable energy money-pit.

Awesome! Except...

6/
...the fifth dam would be on the Congo, flooding the vast basin of land around Lake Chad - pop. today: 20-30 million.

And "Atlantropa" --> Atlantic + Europe. It was by Europeans, FOR Europeans (the wealthier ones).

A final, terrible part of the 'Scramble for Africa'.

7/
But beyond the colossal amount of Yikes there - was Sörgel onto something here?

After all, check out this map of the land gained from a 100-metre drop of the Med. 660,000 km²! (By comparison, Spain is 500,000 km².)

Is this a vision of the future we could all embrace?

8/
LOL. No, mate. It's pretty much loopy from start to finish.

eg. Hey, where would all that evaporating water go? (Answer: into other seas, with dire consequences elsewhere.)

What about wildlife?

And everyone working smoothly together for a common goal? How, um...ambitious.

9/
Nevertheless, maybe (smaller, saner) megaprojects can stir lots of people into action.

If we're best motivated when we "long for the immensity of the sea" as @calflyn quotes here...

prospectmagazine.co.uk/magazine/clima…

...maybe we'd *also* get excited about the shape of our boat?

10/
This is a story from my newsletter, which is about things that make you go WOW:

everythingisamazing.substack.com

I just wrapped this season, which was all about oceans, megafloods and (in this case) architects with *literally* no sense of proportion...

11/
...and this is what the next season is about.

everythingisamazing.substack.com/p/colourful-qu…

OK, enough shameless self-promoting. If you want to know more about Atlantropa...

12/
...@EverywhereTrip has a great overview on his podcast:

everything-everywhere.com/atlantropa-the…

(I can't argue with the title either.)

13/
And here's the mighty @atlasobscura on it:

atlasobscura.com/articles/the-b…

(Again with the Yep-That's-The-Right-Title thing.)

14/
And finally, if you didn't yet know about the Zanclean Megaflood? Oh boy, this one will blow your mind - because it actually happened*:



Whew. Ok. I'm done.

Thank you for reading!

*Proposed, but backed up with highly compelling evidence.

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More from @Mikeachim

Nov 8, 2022
On the 21st July 1976, NASA released the very first colour image taken by the Viking 1 lander from the surface of Mars.

And....wait, what?

The Martian sky is BLUE?

1/ Image
This is obviously not what anyone was expecting. Mars is...

Well, you can see it for yourself on a clear night, with your naked eye. It's noticeably red - about as red as Betelgeuse, tenth-brightest star in our night sky.

No blue. So - what? WHAT?

2/ ImageImage
The Martian atmosphere just isn't thick enough to be blue - just 600 pascals, vs the Earth's 101,000.

That scene in "The Martian" where the rocket's in danger of being blown over? No, sir. Not enough punch to it: space.com/30663-the-mart…

3/ Image
Read 22 tweets
Oct 28, 2022
You know the BEST thing about ancient history? All that pristine grey-white stone! SO CLASSY AND REGAL.

Look at this gorgeously monochrome scene from 'Gladiator'. Just look at how *right* it looks.

Yeah. Except - no. Get ready for a shock.

1/
In the middle of the Parthenon in Athens, the ancient Greek sculptor Phidias (480 – 430 BC) built a gigantic statue of Athena Parthenosos, about 11 metres high.

Alas, nothing remains of it today. But there are enough accounts of its construction to make a replica...

2/ Image
...so someone did that: sculptor Alan Le Quire, in (of all places) Nashville.

Not quite what you were expecting, mayhaps?

Well, it was built around a core of cypress wood, and then panelled with gold and ivory plates. That's the description. That's what they did.

Blimey.

3/ Image
Read 11 tweets
Jun 3, 2022
There's a vast patch of seagrass off the coast of Australia (3 x the size of Manhattan) - and now genetic testing has discovered it's a *single plant* around 4,500 years old:

bbc.co.uk/news/world-aus…

But incredibly, this isn't our planet's biggest living organism...

1/
Oooh. Actually, I might be dead wrong on this. Last I heard, there are single examples of honey fungus in Oregon & Russia that hold that title:

scientificamerican.com/article/strang…

(The Oregon fungus could be up to 8,650 years old, which makes us look a bit like mayflies in comparison.)
But the Australian seagrass covers nearly *200 sq km*, which far outstrips the extent of any recorded single fungus, I think?

Certainly, many places are reporting the seagrass story as The World's Biggest Organism:

science.org/content/articl…

So - okay then.
Read 4 tweets
Apr 24, 2022
If today's a slow one, how about a stroll along the world's longest mountain chain?

No, not Himalaya (2,500km). And not the Andes (7,000km) either.

This one's....65,000km long.

But it's ok. We'll just do a bit of it.

1/
We start in Iceland. (Credit: flickr.com/photos/sackerm…)

OK, I lied. It's only really here can you walk along it: the Þingvellir National Park, where, geologically speaking, North America & Europe are slowly drifting apart.

Enjoy the sunshine! There's none where we're going.

2/
If we went southeast into the water, it gets deep really quickly - maybe 2,000 metres, same as the Black Sea. About the depth of a Russian battleship.

*cough*

But we're following the Mid-Atlantic Ridge - so southwest it is.

3/
Read 29 tweets
Apr 24, 2022
Off of the news that Twitter is banning advertisements that contradict the scientific consensus on climate change (washingtonpost.com/technology/202…) and the inevitable kerfuffle, a distinction worth noting:

Denialism is not the same as healthy, questioning criticism. Not at all.

1/
This gets incredibly complicated and tangled, but - whenever something is contradicting the consensus with *absolute certainty*, it's probably bullshit. Utter certainty is the smoking gun there.

No curiosity, no interested questions, no willingness to be proven wrong.

2/
I guess it's the effect of "one man against the world" narratives, but - the thing about the consensus is it's where basically the weight of all the evidence is.

To overturn one, you need to try to overturn the other. If you're not, while claiming utter certainty?

Yikes.

3/
Read 5 tweets
Mar 25, 2022
I thought I knew the story of the "lost world" off the east coast of Britain, inhabited by Mesolithic people until rising sea waters engulfed it around 8,000 years ago...

But I didn't know about the *tsunami*.

Holy hell.

1/

(Image: bigissue.com/opinion/discov…)
What follows is my imperfect grasp of things. Imperfect because I'm just an enthusiast who likes science - and also imperfect because, excitingly, *the work is happening right now*, in one of the greatest prehistoric archaeological investigations in history.

2/
One September night in 1931, the British vessel Colinda hauled up its nets 25 miles off the Norfolk coast - and found something beautiful & deadly.

Embedded in a lump of peat was this 8.5 inch prehistoric harpoon, carved from bone or antler...

3/
Read 20 tweets

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