c0nc0rdance Profile picture
Apr 15 10 tweets 4 min read Twitter logo Read on Twitter
You've no doubt heard that the Great Library of Alexandria was destroyed in a fire & with it, centuries of knowledge, learning & prose.

But that's not the actual story. The TRUE story of the destruction of the Great #Library of Alexandria has more to teach us than the #myth. Image
First, the Library itself: commissioned ~280 BCE by Cleopatra's ancestor, Ptolemy I Soter, general to Alexander the Great.

The Library was part of a complex of buildings, the Mouseion, dedicated to the Muses, in the city center/royal quarter. Image
Ships docking in Alexandria were searched for books, if found, the owner was compensated & a copy made by scribes.

Royal silver purchased entire libraries from the cities of Athens & Nineveh. At its height, it held between 40,000 and 400,000 separate works. Image
It attracted the best scholars of the Hellenistic world: Zenodotus (Homeric scholar),
Aristophanes (invented poetic structure),
Eratosthenes of Cyrene (determined the Earth's circumference, had giant head). Image
The decline began around 145 BC, when Ptolemy VIII, a vicious & self-serving despot, began exiling scholars who were critical of his harsh rule.

The head librarian (Aristarchus) exiled to Cyprus, triggering a diaspora of other scholars to safer cities around the Mediterranean. Image
Surviving records show a fire started by Julius Caesar's men burning boats in harbor spread to nearby buildings, including warehouse containing books, but no evidence it burned the Mouseion.

Greek geographer Strabo writes of visiting it 30 years later to consult the volumes. Image
No, the Great Library didn't burn down.

It was defunded.

With the death of Cleopatra VI, there simply wasn't enthusiasm for funding a center of learning in the heart of Egypt. No new tomes were added. Works were transferred to wealthy holdings in Rome, sold or discarded. Image
There's evidence the Great Library still existed in 260 AD, a crumbling building with bare shelves.

The building itself was likely destroyed by a siege in the Roman response to the Palmyrene invasion, with the collection housed in other buildings in the complex. Image
In the very final stages, the Neoplatonists (Hypatia) who controlled the remaining works were killed or exiled by Christion zealots who wanted to destroy pagan influences in Egypt.

The last of the collection was lost to time. Image
So, not burned. Diaspora, defunded, privatized, and finally destroyed by religious zealots.

That's how learning and knowledge was lost in the Classical World.

salon.com/2023/04/13/def…

• • •

Missing some Tweet in this thread? You can try to force a refresh
 

Keep Current with c0nc0rdance

c0nc0rdance Profile picture

Stay in touch and get notified when new unrolls are available from this author!

Read all threads

This Thread may be Removed Anytime!

PDF

Twitter may remove this content at anytime! Save it as PDF for later use!

Try unrolling a thread yourself!

how to unroll video
  1. Follow @ThreadReaderApp to mention us!

  2. From a Twitter thread mention us with a keyword "unroll"
@threadreaderapp unroll

Practice here first or read more on our help page!

More from @c0nc0rdance

Apr 15
What do cabbage, kale, broccoli, brussel sprouts, cauliflower, collard greens & kohlrabi have in common?

If you said "they're the same species of plant, selected for different qualities", you're correct!

Let's talk about the chameleon of the vegetable world, the #Brassica! Image
They're all Brassica oleracea, derived from the wild cabbage, which is itself part of the wild mustard FAMILY.

Brussel sprouts are cultivars selected for unopened lateral lead buds, broccoli & cauliflower for the unopened flowers, kale for leaves, kohlrabi for enlarged stem. Image
That's the basics, but there's an even larger family of Brassica whose genetic intercompatibility have produced endless combinations of cultivated crops!

Let's talk about the "triangle of U", named for 1935 paper by 'U Nagaharu' where he presented a theory of Brassica genetics. Image
Read 8 tweets
Apr 15
Almost all women of Ancient Rome dyed their hair, some to henna red, to blonde with guano or ash & vinegar, but the most bizarre was a fermented paste of leeches & vinegar for a black hair dye.

All prostitutes were REQUIRED to be blonde (at all times) under Roman law. Image
Men were a little less likely to dye their hair, considering it a sign of vanity, but a fashion in the Imperial age was to dust one's hair with gold dust.
The fashion in Roman Egypt was jet black hair, which symbolized beauty:
"In order to darken the hair, a mixture of lead oxide, slaked lime (calcium hydroxide) and water was used. A paste was thus obtained, which was then rubbed into the head."
Image is a mummy covering. Image
Read 4 tweets
Apr 12
Touching this bird will result in numbness & tingling in extremities.

Prolonged contact or ingestion can result in paralysis or death.

Let's talk about the #birds that can kill you with a touch.
This is the hooded pitohui, 'Pitohui dichrous' & it contains in its tissues & feathers the neurotoxin homobatrachotoxin.

The same toxin is found in species of poison dart frogs & they likely acquire the toxin from the same source: Choresine beetles.
This is a Melyrid beetle. It contains very low levels of batrachotoxin. By eating a diet high in these beetles, the toxin is concentrated in tissues.

How the bird remains unaffected is unclear, but likely involves evolutionary change to the target receptor.
Read 8 tweets
Apr 11
I hate engaging in this kind of Internet drama, but there's a principle that's important to medical & science communication:

In the late 1980's, there was a switch in HIV/AIDS education replacing:
"gay men" with
"men who have sex with men" (MSM).

Why? Aren't they the same?
One focused on identity & the other on behavior.

Not every man who had sex with men considered themselves gay. The medical advice for "gay men" created an imprecision & potentially an identity barrier that feeds confusion.

So medical comms focused on the BEHAVIOR alone.
MSM includes gay men and also the other diverse groups that were actually at risk. It's not taking the place of more specific labels, just being more inclusive.

I'll fight for precise language like "birthing person" in medical contexts because it avoids confusion, is inclusive.
Read 4 tweets
Apr 11
What does an old CRT monitor have in common with a WWII battleship?

To get to the answer we have to talk about the importance of electromagnetism in WWII naval strategy.
During WWI, the combined German, British & American navies placed more than 200,000 mines to strategically block shipping, narrow sea lanes to concentrate naval force, and blockade seaports.

Most were cheap "contact mines" & minesweeping was slow & dangerous.
At the end of WWI, the British began developing "influence" mines that could detect the magnetic field that comes from a metal ship moving through Earth's magnetic field.

A 'dip-needle fuze' responded to the passage of large magnetized steel hulls without the need for contact.
Read 11 tweets
Apr 11
Thomas Jefferson kept a flock of 40 sheep on the front lawn of the White House, among them a polycerate (4 horned) Shetland ram that attacked pedestrians who tried to cross the square.

After it killed a little boy, they moved it back to Monticello.

yup: KILLER POTUS RAM
Image of the White House circa 1796 below, to show "President's Square" was surrounded by a low fence.

You can read the full account here, but there's not a lot of detail beyond personal correspondence. The little boy who was killed is not identified.
https://t.co/oLjVU4mGV8monticello.org/research-educa…
In case you want to skip the primary source, you'll want to read this:
"One William Keough wrote Jefferson that 'in Passing through the President's Square I was attacked and severely wounded and bruised by your excellency's ram—of which I lay ill for five or six weeks.'"
Read 4 tweets

Did Thread Reader help you today?

Support us! We are indie developers!


This site is made by just two indie developers on a laptop doing marketing, support and development! Read more about the story.

Become a Premium Member ($3/month or $30/year) and get exclusive features!

Become Premium

Don't want to be a Premium member but still want to support us?

Make a small donation by buying us coffee ($5) or help with server cost ($10)

Donate via Paypal

Or Donate anonymously using crypto!

Ethereum

0xfe58350B80634f60Fa6Dc149a72b4DFbc17D341E copy

Bitcoin

3ATGMxNzCUFzxpMCHL5sWSt4DVtS8UqXpi copy

Thank you for your support!

Follow Us on Twitter!

:(