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Speaker 1: Welcome to Thrilling Threads. We have an absolutely incredible story

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for you today, based on an object that frankly should

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not exist.

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Speaker 2: Yeah.

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Speaker 1: Our mission is to explore the anti theram mechanism.

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Speaker 2: It's often called the world's first analog computer.

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Speaker 1: Exactly, and we're going to try and solve the massive

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historical paradox that it represents. We're looking for the why

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behind what seems to be a complete vanishing act of

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an entire branch of advanced technology.

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Speaker 2: It's a story that really needs a dramatic opening because

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the discovery itself was so dramatic. So picture this. It's

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the year nineteen hundred. Great, you have sponge divers working

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in these treacherous waters off the coast of a small

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Greek island and a kytherra. They stumble upon an ancient

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Roman shipwreck.

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Speaker 1: And they start hauling up just incredible treasures, right, bronze statues, marble,

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silver coins, a huge fine for classical antiquies.

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Speaker 2: A monumental hall. But then one of the divers, a

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man named Elia Stadiadis, he surfaces with this, well, this

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strange encrusted lump.

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Speaker 1: Yeah, it wasn't beautiful like that. The other statues the

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descriptions just call it a lump of corrodied bronze and wood. Yeah,

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I mean, compared to everything else they were finding, it

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must have seemed.

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Speaker 2: Like junk, completely unremarkable, so much so that when it

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finally got to the National Museum of Archaeology and Athens,

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it just sat there for how long? For two full years,

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mostly unnoticed.

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Speaker 1: And that lump, that piece of junk, turned out to

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be the clockwork heart of an ancient Greek computer.

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Speaker 2: An analog computer built somewhere in the late second or

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early first century BC. I think Derek Desill Price, who

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was one of the pioneers in researching the mechanism, he

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put it best.

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Speaker 1: What did you say?

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Speaker 2: He said, finding it was like opening a pyramid and

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finding an atomic bomb.

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Speaker 1: Wow. That analogy just perfectly captures the paradox, doesn't it.

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It's not just an old object, it's a piece of

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technology that feels radically out of its time.

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Speaker 2: You have this incredibly complex, geared machine in say one

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hundred BC, showing a level of precision that is just startling.

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Speaker 1: Then that level of sophistication just disappears from the Western world.

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Speaker 2: That's the core question, isn't it? The historical hiatus. The

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anti Keithram mechanism, and we'll probably just call the mechanism

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or the device was more sophisticated than any known machine

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for over a millennium.

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Speaker 1: And a half, So we don't see anything like it

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again until when until.

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Speaker 2: The great astronomical clocks built in European cathedrals during the

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fourteenth century the thirteen hundreds.

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Speaker 1: So this is fundamentally about a fifteen hundred year gap.

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If the Greeks had the knowledge, the technical ability, why

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didn't it continue. Why did this entire tradition of precision

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engineering just vanish in the West.

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Speaker 2: To really understand what was lost, I think we first

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have to appreciate the sheer genius of the thing itself.

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Speaker 1: Absolutely, Yeah, let's start with the physical reality of the mechanism.

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How did researchers even begin to figure out what this

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corroded lump was?

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Speaker 2: Well, it came from that Roman shipwreck, which sank around

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sixty BC. That suggests the mechanism itself is probably older,

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maybe a century old when it went down, and two.

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Speaker 1: Thousand years at the bottom of the sea. Can't have

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been good for it.

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Speaker 2: Oh, it was devastating. The bronze reacted with the saltwater,

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creating this deep layer of corrosion, a substance called attachomite.

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It basically fused everything together.

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Speaker 1: Which made the initial analysis almost impossible. Imagine it was

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just a collection of fragile, broken fragments exactly.

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Speaker 2: The corrosion caused huge deformational changes. If you try to

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pry it apart manually, you just destroy it.

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Speaker 1: So what changed? How do we finally see inside?

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Speaker 2: Modern technology, specifically high resolution X ray tomography and surface

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imaging teams like the Anti Kithera Mechanism Research Project were

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able to create these three dimensional digital maps of.

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Speaker 1: The inside, like a t K scan for an artifact.

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Speaker 2: Precisely, and that allowed them to see all the internal components,

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the gears, and crucially the tiny detailed Greek inscriptions on

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its surfaces, which were like the device's instruction manual.

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Speaker 1: And what those images showed was just astounding complexity, all

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pack into a tiny space.

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Speaker 2: It was in a wooden box, probably about the size

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of a shoe box, and inside we have confirmed at

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least thirty separate bronze gears, though everyone believes the original

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had many.

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Speaker 1: More, many more, and these aren't just simple cogs right,

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not at all?

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Speaker 2: These are highly complex triangular toothed gears. The level of

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miniaturization and precision engineering is and researchers repeat this constantly,

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only comparable to astronomical clocks made fifteen centuries later. It's

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a kinematic masterpiece.

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Speaker 1: To get to that level of complexity, they must have

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had some revolutionary components I know. Our sources highlight three

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key innovations. Let's start with the first one, epicyclic.

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Speaker 2: Gearing planetary gears.

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Speaker 1: Why was that specific arrangement so essential for a machine.

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Speaker 2: Like this because the sky is irregular from our perspective

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here on Earth, the planets, the Sun, and especially the Moon,

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they don't move at a constant, uniform speed.

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Speaker 1: Right. If you just use simple gears, the machine would

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predict a perfect circular orbit, which isn't reality.

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Speaker 2: The key problem they had to solve was something called

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the lunar anomaly.

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Speaker 1: And that anomaly is just the variable speed of the

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Moon because its orbit is an ellipse, not a perfect circle.

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Sometimes it's closer to us and appears to move faster,

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Sometimes it's farther and appears to slow down.

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Speaker 2: That's it, and an epicyclic gear train solves this mechanically,

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instead of all the gears being fixed on one axis,

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you have intermediate gears. The planet's rotating around a central

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sun gear, so.

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Speaker 1: You have gears turning on other gears.

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Speaker 2: Right. This complex nested movement with gears spinning on their

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own axes while also orbiting a central axis, allows the

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machine to model that non uniform motion. The gears themselves

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physically create the acceleration and deceleration needed to show the

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Moon's correct position.

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Speaker 1: That's incredible. It's a physical solution to an abstract mathematical

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problem that astronomers like Hipparcass were working on.

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Speaker 2: They were translating advanced astronomical theory directly into kinetic hardware.

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It's a stunning intellectual leap for the second scent BC.

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Speaker 1: But it didn't stop there. The mechanism also had something

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even more advanced, differential gearing.

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Speaker 2: The differential is perhaps the single most impressive component. We

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usually think of differentials in modern machines, like the axle

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of a car right.

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Speaker 1: Letting the wheels turn at different speeds when you go

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around a.

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Speaker 2: Corner, exactly. But in the mechanism they needed it for

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a different reason. They needed it to mechanically add and

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subtract rotational speeds at the same time.

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Speaker 1: Why would you need to subtract rotation.

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Speaker 2: To calculate the sonotic month. That's the time it takes

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for the moon to go through a full cycle of

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its phases, from one new moon to the next. It's

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a critical calculation for any calendar.

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Speaker 1: Okay, So how does subtraction get you there?

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Speaker 2: To get the sonotic month? You need to calculate the

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difference between the angular velocity of the Moon and the

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angular velocity of the Sun. Ah.

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Speaker 1: I see. So the differential gear takes the input rotation

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for the moon's position, takes the input for the Sun's position,

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and its output is literally the difference between the.

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Speaker 2: Two precisely, and that output was then used to drive

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the display for the moon's phase. There was a little

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sphere half silvered and half black that would rotate to

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show you the waxing and waning crescent, the full moon, everything.

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The differential made that possible.

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Speaker 1: And this is the first known use of a differential gear.

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Speaker 2: In history, the very first, and it wouldn't be seen

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again for centuries.

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Speaker 1: So we have epicyclic gears for the lunar anomaly, a

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differential for the moon phase. What about the third major component,

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the pin and slot mechanism. This one sounds a bit

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more abstract.

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Speaker 2: It's an incredibly clever cam follower system. Its job was

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to add another layer of correction to the Moon's motion,

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making it even more accurate than the epiicyclic gears alone could.

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Speaker 1: How did it work?

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Speaker 2: Imagine a slotted bar being driven by a gear, but

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instead of the gear being at the center, a small

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pin attached to another gear slides back and forth inside

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that slot.

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Speaker 1: Okay, I think I can picture that the pin isn't fixed.

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Speaker 2: It's sliding right, And as that pin slides through the slot,

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it doesn't move at a constant rate relative to the

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rotation of the driving gear. The shape of the slot

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forces it to speed up and slow.

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Speaker 1: Down, so it imparts a non uniform motion to whatever

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it's connected to.

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Speaker 2: Exactly, it imparts that motion to the pointer showing the

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Moon's position on the front dial. This system allowed for

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a smooth, continuous, and highly accurate modeling of the moon's

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observed irregularity. It shows the builders were implementing the absolute

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state of the art hellenistic astronomical theory of their time.

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Speaker 1: So with all that revolutionary hardware. Inside, what did the

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user actually see? Let's talk about the front and back displace.

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Speaker 2: The front face was your immediate map of the heavens.

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It had two main circular scales. The inner one showed

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the Greek signs of the zodiac marked out in precise degrees, and.

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Speaker 1: An outer ring was a calendar. For a long time,

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everyone just assumed it was the standard three hundred and

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sixty five day Egyptian solar calendar.

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Speaker 2: That was the accepted theory for decades. But modern analysis

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has well pretty much overturned that.

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Speaker 1: What did they find?

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Speaker 2: High tech imaging statistical analysis, especially by researchers like Tony

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Freeth and John Steele, showed that the number of intervals

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or days on that ring is highly unlikely to be

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three hundred and sixty five.

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Speaker 1: What are the evidence points to?

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Speaker 2: The statistical probability based on the surviving fragments strongly favors

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account between three hundred and fifty two and three hundred

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and fifty five intervals.

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Speaker 1: Ah So a lunar calendar.

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Speaker 2: Almost certainly a three hundred and fifty four day lunar calendar,

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which corresponds to the sonotic lunar year used in many

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local Greek calendars. The probability that it was a three

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hundred and sixty five day solar calendar is statistically tiny.

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Speaker 1: So even the main front dial was deeply tied to

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the Moon's cycles, not just the suns deeply.

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Speaker 2: And on that dial you would have had pointers showing

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the Moon's position already corrected by all that clever gearing,

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and the position of the mean Sun, which acted as

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the date pointer.

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Speaker 1: It seems like they put so much effort into correcting

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the Moon's position. Was there any correction for the Sun's

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apparent motion.

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Speaker 2: That's a great question. We haven't found the hardware for,

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but many researchers believe there must have been a separate

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true sun pointer to account for the solar anomaly the

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Earth's elliptical orbit around the Sun.

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Speaker 1: It seems logical. I mean, if you're going to fix

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the lunar anomaly, why would you ignore the solar one.

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Speaker 2: It seems unthinkable, But finding the proof in the fragments

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is the challenge. Now, if we turn the machine over,

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we get to the really powerful long term prediction engines

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on the back.

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Speaker 1: This is where it gets really complex.

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Speaker 2: The backface of these two large spiral dials. The main

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upper dial displayed the metonic.

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Speaker 1: Cycle, the metacycle. That's a nineteen year period right exactly.

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Speaker 2: It's a cycle of two hundred and thirty five sonotic months,

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which is almost exactly equal to nineteen solar years. It's

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the key to synchronizing lunar and solar calendars over the

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long term.

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Speaker 1: And the mechanism displayed this on a huge five turned

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spiral track.

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Speaker 2: Yes, a pointer would trace that spiral path over the

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full nineteen years, and the inscriptions on that dial are

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fascinating because they help us pinpoint where the machine came from.

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Speaker 1: Month names.

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Speaker 2: The month names are Corinthian words like foynacios and my

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favorite macheneous mechaneous. It means mechanic or engineer, likely a

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title for Zeus, the inventor. The calendar is strongly linked

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to one used in Apyrus in northwestern Greece, suggesting the

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mechanism originated there, maybe in a Corinthian colony, and.

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Speaker 1: The other big dial on the back was for predicting.

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Speaker 2: Eclipses the sarastyle. The Sara cycle is an eighteen year,

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eleven day period two hundred and twenty three sonotic months,

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after which the pattern of solar and lunar eclipses repeats

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almost identically.

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Speaker 1: So it was an eclipse prediction tool, a.

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Speaker 2: Highly effective one. It could tell you when solar and

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lunar eclipses were likely to happen, which is vital information

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for both religious and civil life.

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Speaker 1: And mixed in with all this high level astronomy, there

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was something a bit more local, right the Games dial.

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Speaker 2: Yes, a smaller dial that tracked the four year cycle

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of the ancient athletic games. It even mentions the minor

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naw Games of Dodona in a pyrus, which again really

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reinforces that pecific geographical origin.

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Speaker 1: It's such a great detail. It grounds this cosmic computer

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in a real human community using it to schedule their festivals.

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Speaker 2: It absolutely does so.

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Speaker 1: It predicts eclipses, tracks calendars, corrects for orbital anomalies, schedules games.

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It seems almost certain that a device this advance must

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have also tracked the planets.

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Speaker 2: That is the strong belief. Yes, it's still an area

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of conjecture, but it's supported by inscriptions found on the

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fag mets.

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Speaker 1: The inscriptions mentioned the planets.

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Speaker 2: They clearly refer to the five classical planets. Mercury, Venus, Mars, Jupiter,

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and Saturn.

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Speaker 1: But the thirty gears they found aren't enough to model

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all of them, are they?

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Speaker 2: No, not the thirty that survived, But researchers have created

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models showing that the original casing had more than enough

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space and the engineering principles the Greeks used were sufficient

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to do it.

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Speaker 1: It would have required even more complex.

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Speaker 2: Gearing is immensely complex. For Mercury and Venus, for instance,

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you'd need a whole new system of episclic gears mounted

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on the main solar gear, probably driving another pinin slow mechanism.

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It's a mechanical puzzle, but a solvable one.

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Speaker 1: So the consensus is that the original complete device was

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much bigger.

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Speaker 2: Oh yes, The current thinking is that the fully functional

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mechanism probably had closer to seventy gears, not just thirty.

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It was a complete clockwork universe in a box. The

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sophistication is just undeniable.

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Speaker 1: Which brings us back to that central question. It's so

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easy to look at this and think it's a complete,

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one off and out of place artifact.

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Speaker 2: That the sources are clear that it wasn't a miracle.

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It was the absolute pinnacle the zenith of a very real,

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if very specialized Hellenistic mechanical tradition, a tradition of what

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they call techne.

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Speaker 1: This machine didn't just appear in a vacuum, not at all.

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Speaker 2: It was the n product of centuries of accumulated knowledge,

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primarily centered in places like Alexandria, Rhodes and Syracuse. To

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understand the mechanism, you have to look at its ancestors.

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Speaker 1: And two names always come up. The first is Tiscibius,

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who is working way back around two ninety BCE. He's

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called the father of nomad.

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Speaker 2: Sissibius was a master craftsman. He invented the water pump,

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He invented the water organ, the hydraulus. But his most

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important contribution to this tradition was probably his work on

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time keeping, the water clock. He invented the first truly

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accurate water clock or clipsidra see. Earlier water clocks were

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wildly inaccurate because as the water level dropped, the pressure

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changed and so did the drip rate.

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Speaker 1: But Tis Sibius fix.

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Speaker 2: That he did. He invented these incredibly clever float operated

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valves that kept the water pressure perfectly constant. This idea

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of a self regulating continuous mechanism is foundational to all

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later complex machinery.

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Speaker 1: So he's laying the groundwork for control systems. Then much

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later you have Hero of Alexandria around sixty two.

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Speaker 2: See Hero is crucial because he was a documenter, he

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was a systematizer. He wrote these extensive manuals like Pneumatica

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that preserved so much of the earlier work of Sissibius

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and others, and his.

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Speaker 1: Writings describe a world that sounds almost like a theme

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park of automation birds, temple doors that open.

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Speaker 2: Automatically, automatic doors triggered by lighting a fire on an altar,

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and even the elol pile, a rudimentary steam engine. His

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work shows that the Greeks had a thriving mechanical culture

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for centuries. They could build complex machines with levers, linkages

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and control systems.

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Speaker 1: But for the direct lineage of geared astronomy, the specific

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tradition of the Antikira mechanism, we have to go back

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to one man.

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Speaker 2: We have to go back to Syracuse and to the

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legend himself, Archimedes.

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Speaker 1: The mechanism is basically the only surviving physical proof of

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a tradition he started.

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Speaker 2: The tradition of spheral Poius fear making. We only know

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about his mechanical planetaria from written sources, mainly the Roman

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statesman Cicero right.

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Speaker 1: Cicero, in his work Dairy Publica, tells the story of

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two devices built by Archimedes that were brought to Rome

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after Syracuse fell in two to twelve BC.

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Speaker 2: One was a simple star globe, but the other was

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a full mechanical planetarium, a geared simulator that accurately showed

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the motions of the Sun, the Moon, and the five

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known planets.

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Speaker 1: And Cicero uses this very specific phrase to describe it.

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Speaker 2: He does, and it's the historical smoking gun. He says.

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Archimedes' invention was admirable because he had calculated how a

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single revolution should maintain unequal and diversified progressions in dissimilar motions.

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Speaker 1: Unequal and diversified progression.

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Speaker 2: That's it. That phrase is the confirmation. It proves that

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the technology to model non uniform celestial motion using complex

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gearing existed two centuries before the Antitherram mechanism was even built.

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The knowledge base was there, and.

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Speaker 1: Cicero mentions that one of his contemporaries had built a

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similar device, which means it wasn't just some lost secret

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of Archimedes exactly.

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Speaker 2: The knowledge was reproducible, at least among a very elite

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group of engineers. The anti theorem mechanism is simply the

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only one that survived. It's the physical proof of the

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Archimedean tradition.

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Speaker 1: So you have the intellectual groundwork, you have the mechanical precedence,

357
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use the specific geared tradition, and underneath it all there

358
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was even a philosophical idea about what these machines could do.

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Speaker 2: A powerful one. You can look at Aristotle who predicted

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that a political utopia could only happen if automatic machines

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were invented to do all the physical labor, which would

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eliminate the need for slavery, a vision.

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Speaker 1: Of technological liberation thousands of years ago.

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Speaker 2: It shows that the smartest minds of the age saw

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the potential, and that right there is the great tragedy.

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If they had the genius, the theory, the foresight, and

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the actual hardware to build a clockwork universe, why did

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it all disappear in the West for fifteen hundred years.

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Speaker 1: This is the real core of our deep dive. The

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mechanism isn't just a monument to genius. It's also a

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monument to a profound failure. It's proof that a civilization

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can just lose its most advanced skills.

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Speaker 2: And it wasn't because they weren't smart enough. The failure

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was built into the very structure of their society.

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Speaker 1: Let's start with the most fundamental problem, the intellectual divide

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between theory or epistem and practical craft technic.

377
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Speaker 2: This was a devastating separation the intellectual elite, the philosophers

378
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and mathematicians. They held engineering and any kind of craft

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work in deep contempt.

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Speaker 1: It wasn't just an accent, it was part of their

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worldview right absolutely.

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Speaker 2: For thinkers like Plato and Aristotle, pure thought, pure mathematics,

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episteme was the noble activity of a free mind. But

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practical work, anything that involved getting your hands dirty with

385
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metal or wood techne was considered sordid and ignoble, the

386
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work of laborers and slaves.

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Speaker 1: And Plucharch's account of Archimedes is the perfect example of

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this attitude.

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Speaker 2: It's the smoking gun. Plutar tells us that Archimedes, despite

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all his incredible inventions, repudiated as sordid and ignoble the

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whole trade of engineering. He refused to leave behind any

392
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written works on his practical machines.

393
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Speaker 1: He only wanted to be remembered for his pure.

394
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Speaker 2: Mathematics exactly, And the consequence of that philosophical snobbery was fatal.

395
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The people who wrote everything down, the philosophers, refused to

396
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document how to actually build these things, how to cut

397
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the gears, how to tool the metal.

398
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Speaker 1: And the people who did know how to build them,

399
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the artisans and craftsmen. They weren't part of that literary

400
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academic elite.

401
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Speaker 2: Their knowledge was passed down orally or through apprenticeship. It

402
00:19:13,160 --> 00:19:17,000
was a fragile, ephemeral body of knowledge, completely dependent on

403
00:19:17,079 --> 00:19:18,960
continuous practice in their workshops.

404
00:19:19,039 --> 00:19:21,039
Speaker 1: So when those workshops disappeared.

405
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Speaker 2: The knowledge vanished. All that was left was the theoretical

406
00:19:23,640 --> 00:19:26,559
geometry in books, which is useless if you don't have

407
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the craft skills to turn it into a physical object.

408
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Speaker 1: And that fragility was made so much worse by the

409
00:19:32,000 --> 00:19:36,839
second major problem, the socioeconomic paralysis of a slave society.

410
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Speaker 2: This is the really brutal part of the story. Why

411
00:19:39,799 --> 00:19:43,279
would you invest in developing and spreading labor saving machinery

412
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when your entire economy is built on a constant, cheap

413
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supply of human slave labor.

414
00:19:48,759 --> 00:19:51,480
Speaker 1: There was no economic incentive for it. Innovation was a

415
00:19:51,480 --> 00:19:54,000
hobby for the rich, not an economic necessity.

416
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Speaker 2: Precisely, the anti Keither mechanism, as amazing as it was,

417
00:19:58,039 --> 00:20:01,279
was a luxury item. It was a spoke, high cost

418
00:20:01,319 --> 00:20:03,440
toy for a wealthy patron to show off.

419
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Speaker 1: It never became a standardized, widely used piece of technology,

420
00:20:07,160 --> 00:20:08,680
like say the medieval clock.

421
00:20:09,119 --> 00:20:13,160
Speaker 2: Never and that kind of elite patronage is inherently unstable.

422
00:20:13,640 --> 00:20:16,640
It doesn't create the continuous industrial demand you need to

423
00:20:16,720 --> 00:20:21,960
keep a complex engineering tradition alive for centuries. Francis Bacon

424
00:20:22,039 --> 00:20:26,359
later said ancient science was like a vestal virgin, beautiful, revered,

425
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but ultimately unable to bear fruit.

426
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Speaker 1: It was an adornment for a privileged few, not a

427
00:20:31,400 --> 00:20:33,240
tool to transform life for everyone.

428
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Speaker 2: So you have this intellectual failure to document the craft

429
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and an economic failure to spread the technology. The full

430
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system was incredibly.

431
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Speaker 1: Fragile, ready to shatter as soon as a real political

432
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shock arrived.

433
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Speaker 2: Which brings us to the third and final factor, institutional collapse.

434
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The slow decline and eventual fall of the Western Roman

435
00:20:51,680 --> 00:20:54,640
Empire was the shock that this fragile ecosystem just could

436
00:20:54,720 --> 00:20:55,400
not survive.

437
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Speaker 1: The infrastructure that supported it all just disappeared. The wealthy patrons,

438
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the academic centers like the Library of Alexandria, the high

439
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precision metal workshops all gone.

440
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Speaker 2: And we often think of the Dark Ages is just

441
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a time when books were lost, But it was much

442
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more visceral than that. They lost the ability to make things.

443
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Speaker 1: The loss of even basic skills is startling.

444
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Speaker 2: It really is. Historians of technology point to things like

445
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pottery in post Roman Britain. Archaeologists can see that communities

446
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lost the ability to consistently make fast, wheel thrown pottery.

447
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They went back to cruder, handbuilt methods.

448
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Speaker 1: If you can lose a skill as basic as using

449
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a potter's wheel properly, what chance did the highly specialized

450
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craft of gear cutting have zero chance?

451
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Speaker 2: The whole interdisciplinary ecosystem, the skilled metallurgists, the tool makers,

452
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the supply chains for good bronze, the patrons, it all evaporated.

453
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The techne atrophied and died, creating that fifteen hundred year

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vacuum in the West.

455
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Speaker 1: But and this is a critical point that narrative of

456
00:21:56,240 --> 00:22:00,400
collapse is geographically specific. The vacuum was in Western Europe.

457
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The knowledge didn't die out completely.

458
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Speaker 2: No, it didn't die it migrated. It found continuity in

459
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the East, which acted as the crucial bridge to the future.

460
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Speaker 1: While the West was losing basic skills, the Eastern Roman Empire,

461
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Byzantium was still going strong.

462
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Speaker 2: Byzantium maintained its sophisticated urban culture, its libraries, and its

463
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mechanical engineering tradition which inherited directly from the Hellenistic world.

464
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Speaker 1: And the most spectacular evidence of this preserved techne was

465
00:22:25,759 --> 00:22:30,400
in the imperial court. They use these incredible automata as

466
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a form of political theater.

467
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Speaker 2: It was all about projecting divine power. Imagine you're an

468
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ambassador visiting the emperor in Constantinople. You're brought into the

469
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throne room and you.

470
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Speaker 1: See roaring mechanical.

471
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Speaker 2: Lions, roaring mechanical lions, a golden tree full of singing

472
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mechanical birds, and the most impressive of all, the ascending throne.

473
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Speaker 1: The throne itself would rise up into.

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Speaker 2: The air using a hydraulic or counterweight system. It would

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physically lift the emperor up above the audience, symbolizing his

476
00:22:59,000 --> 00:23:02,599
closeness to God. This wasn't just for show. It required

477
00:23:02,680 --> 00:23:06,960
complex large scale mechanics, gears, linkages, control systems.

478
00:23:07,319 --> 00:23:10,200
Speaker 1: It's powerful evidence that the core engineering skills were never

479
00:23:10,240 --> 00:23:12,240
lost in the East, they were just being used for

480
00:23:12,279 --> 00:23:13,920
a different purpose exactly.

481
00:23:14,240 --> 00:23:16,799
Speaker 2: But the truly decisive step, the thing that saved and

482
00:23:16,880 --> 00:23:20,079
advanced the tradition, happened during the Islamic Golden Age.

483
00:23:20,240 --> 00:23:22,920
Speaker 1: This is where the crucial shift happens from technology as

484
00:23:22,920 --> 00:23:25,720
a luxury to technology as a practical necessity.

485
00:23:26,039 --> 00:23:29,319
Speaker 2: That's the difference maker. The Islamic world created a new

486
00:23:29,480 --> 00:23:33,039
institutional demand for precision science. They needed it to run

487
00:23:33,079 --> 00:23:37,000
their society and fulfill religious duties like what accurately determining

488
00:23:37,039 --> 00:23:40,039
prayer times, finding the direction of Mecca from anywhere in

489
00:23:40,039 --> 00:23:42,799
the world, fixing the start of the lunar months for

490
00:23:42,880 --> 00:23:47,880
the calendar. This created a continuous, stable, high level demand

491
00:23:47,960 --> 00:23:49,839
for scientific instruments, and.

492
00:23:49,880 --> 00:23:53,680
Speaker 1: That demand provided the resources and the incentive not just

493
00:23:53,720 --> 00:23:57,000
to preserve the knowledge, but to refine it and crucially

494
00:23:57,440 --> 00:23:58,480
to document it.

495
00:23:58,640 --> 00:24:02,000
Speaker 2: Something the classical world never did. And we can trace

496
00:24:02,119 --> 00:24:06,000
the legacy of geared astronomy directly through this tradition. For example,

497
00:24:06,119 --> 00:24:09,400
there's Alberuni's Moon box from the eleventh century. He described

498
00:24:09,440 --> 00:24:11,759
an eight geared device for showing the phases of the

499
00:24:11,799 --> 00:24:15,200
moon and the sun's position. It has clear mechanical echoes

500
00:24:15,240 --> 00:24:17,160
of the Hellenistic tradition, but the.

501
00:24:17,079 --> 00:24:21,319
Speaker 1: Real physical proof the direct air to the anti kthera mechanism,

502
00:24:21,680 --> 00:24:24,039
is the geared astrolabe from ISFAM.

503
00:24:24,200 --> 00:24:26,720
Speaker 2: That astrolabe, made in twelve twenty one is the oldest

504
00:24:26,759 --> 00:24:29,960
complete surviving geared machine in the world. It used intricate

505
00:24:30,039 --> 00:24:33,119
internal gearing to show the moon's phase and age, and

506
00:24:33,200 --> 00:24:35,039
it could predict eclipses.

507
00:24:34,720 --> 00:24:38,000
Speaker 1: So its complexity was comparable to the anti keither mechanism.

508
00:24:38,119 --> 00:24:42,480
Speaker 2: Demonstrably comparable. It proves without a doubt that the high

509
00:24:42,559 --> 00:24:46,119
level knowledge of kinematic engineering never actually banished from the

510
00:24:46,160 --> 00:24:47,400
world stage, and what.

511
00:24:47,519 --> 00:24:51,799
Speaker 1: Truly cemented its survival was that shift from fragile craft

512
00:24:51,839 --> 00:24:57,119
knowledge to systematic documentation. People like al Jazari Ismael.

513
00:24:56,799 --> 00:24:59,759
Speaker 2: Al Jazari is a hero of this story. His masterpiece,

514
00:25:00,119 --> 00:25:03,440
the Book of Knowledge of Ingenious Mechanical Devices from twelve

515
00:25:03,480 --> 00:25:07,200
oh six, is the detailed technical manual that the antikythra

516
00:25:07,319 --> 00:25:08,559
builders never wrote.

517
00:25:08,680 --> 00:25:10,599
Speaker 1: His elephant clock is the famous.

518
00:25:10,279 --> 00:25:14,359
Speaker 2: Example fantastic example. It was this huge, complex water clock

519
00:25:14,440 --> 00:25:18,160
that used float mechanisms, linkages and gear trains. But the

520
00:25:18,160 --> 00:25:22,079
most important thing is that he documented everything. He explained

521
00:25:22,119 --> 00:25:23,559
how and why it all worked.

522
00:25:23,799 --> 00:25:25,720
Speaker 1: And his work wasn't just for show. A lot of

523
00:25:25,799 --> 00:25:27,359
it was for public utility.

524
00:25:27,079 --> 00:25:29,799
Speaker 2: Right now, yes, things like water lifting devices for irrigation

525
00:25:30,000 --> 00:25:34,920
and hospitals. This stable, practical institutional demand allowed the engineering

526
00:25:34,920 --> 00:25:37,279
tradition to flourish and be passed on ready for the

527
00:25:37,319 --> 00:25:37,839
next chapter.

528
00:25:38,079 --> 00:25:41,079
Speaker 1: So the knowledge didn't disappear, It just migrated East where

529
00:25:41,079 --> 00:25:44,319
it was codified, developed and prepared for its journey back

530
00:25:44,319 --> 00:25:44,759
to Europe.

531
00:25:44,839 --> 00:25:47,240
Speaker 2: The reintroduction of that knowledge began in the twelfth and

532
00:25:47,319 --> 00:25:51,839
thirteenth centuries with the Great Translation Movement. European scholars started

533
00:25:51,839 --> 00:25:56,640
translating all these preserved Greek and critically Islamic scientific texts

534
00:25:57,079 --> 00:25:58,119
back into Latin.

535
00:25:58,240 --> 00:26:00,680
Speaker 1: So they got the theory back. But as we saw

536
00:26:00,720 --> 00:26:04,359
with the Greeks, theory isn't enough. Europe needed the right

537
00:26:04,519 --> 00:26:08,240
social and economic conditions for that knowledge to actually take root.

538
00:26:08,200 --> 00:26:11,640
Speaker 2: And the soil had been prepared. Medieval European society was

539
00:26:11,720 --> 00:26:14,799
fundamentally different from the ancient world. It wasn't built on

540
00:26:14,839 --> 00:26:17,680
the backs of slaves. It was built on non human power.

541
00:26:17,920 --> 00:26:20,440
Speaker 1: We're talking about the explosion of water mills.

542
00:26:20,119 --> 00:26:25,559
Speaker 2: And windmills, watermills, windmills, the modern horse harness that revolutionized agriculture,

543
00:26:25,839 --> 00:26:30,359
even the simple chimney which transformed domestic life. This new society,

544
00:26:30,559 --> 00:26:34,920
based on labor scarcity had a huge incentive to develop machinery.

545
00:26:34,720 --> 00:26:37,440
Speaker 1: And that spurred the invention of the mechanical clock. The

546
00:26:37,440 --> 00:26:39,759
first ones we know of appear in the late twelve hundreds.

547
00:26:39,920 --> 00:26:42,119
Speaker 2: The one at Dunstable Priory in twelve eighty three is

548
00:26:42,119 --> 00:26:44,960
one of the earliest. These clocks were revolutionary not because

549
00:26:44,960 --> 00:26:47,559
they were accurate. They were horribly inaccurate at first.

550
00:26:47,640 --> 00:26:50,079
Speaker 1: They lost fifteen or thirty minutes a day easily.

551
00:26:50,160 --> 00:26:52,440
Speaker 2: But they were revolutionary because they solved the problem of

552
00:26:52,480 --> 00:26:55,559
regulated energy release with the invention of the escapement, the.

553
00:26:55,680 --> 00:26:59,519
Speaker 1: Vergin fullid escapement. It allowed the clock to run continuously

554
00:26:59,599 --> 00:27:02,359
and at aonymously driven by a weight.

555
00:27:02,519 --> 00:27:05,759
Speaker 2: And that created the continuous social and economic demand for

556
00:27:05,839 --> 00:27:09,319
gear cutting that the ancient world had lacked. But as

557
00:27:09,359 --> 00:27:12,000
you said, they were still crude. To get back to

558
00:27:12,039 --> 00:27:15,359
the anti cathera level of complexity, they needed to combine

559
00:27:15,359 --> 00:27:19,000
their new escapement with the refined astronomical gearing that had

560
00:27:19,039 --> 00:27:20,559
been preserved in the East.

561
00:27:20,319 --> 00:27:23,119
Speaker 1: And that synthesis finally happened in the fourteenth century with

562
00:27:23,200 --> 00:27:26,759
the creation of the monumental astronomical clocks the Astralia.

563
00:27:27,079 --> 00:27:30,720
Speaker 2: Yes, the device that definitively closed that fifteen hundred year

564
00:27:30,759 --> 00:27:34,880
gap was Giovanni Dedandi's Astraarium, built between thirteen forty eight

565
00:27:34,880 --> 00:27:35,920
and thirteen sixty four.

566
00:27:36,039 --> 00:27:39,640
Speaker 1: This was the true mechanical successor to the antikithra mechanism.

567
00:27:39,880 --> 00:27:42,480
Speaker 2: It was a masterpiece that matched and then surpassed its

568
00:27:42,519 --> 00:27:45,960
ancient predecessor. It stood about a meter tall and used

569
00:27:45,960 --> 00:27:48,799
around one hundred and seven gears. It was a complete

570
00:27:48,880 --> 00:27:52,440
astronomical calculator, showing the positions of the Sun, Moon, and

571
00:27:52,599 --> 00:27:56,119
all five planets, all driven by a weight powered clock.

572
00:27:56,279 --> 00:28:00,200
Speaker 1: So this is the moment when Hellenistic genius, preserved by

573
00:28:00,240 --> 00:28:05,279
Islamic scholars, finally meets the new energy regulating technology of

574
00:28:05,319 --> 00:28:06,200
the European clock.

575
00:28:06,480 --> 00:28:10,400
Speaker 2: And crucially, unlike the anti Kythera mechanism did Dondie wrote

576
00:28:10,400 --> 00:28:14,960
everything down. He painstakingly documented every single gear, every ratio,

577
00:28:15,039 --> 00:28:17,519
every part of its construction, and that's the key difference.

578
00:28:17,519 --> 00:28:20,920
That's everything. From Dondie onwards. The written record of clockwork

579
00:28:20,960 --> 00:28:25,319
development is continuous. The knowledge was finally institutionalized, valued for

580
00:28:25,359 --> 00:28:29,200
both its theory, its epistome, and its practical application its technee.

581
00:28:29,480 --> 00:28:30,759
It never disappeared again.

582
00:28:30,799 --> 00:28:33,799
Speaker 1: So let's pull all these threads together. The antikytherer mechanism

583
00:28:33,920 --> 00:28:38,000
was this breathtaking, unmatched achievement. It was a clockwork cosmos

584
00:28:38,000 --> 00:28:38,559
in a box.

585
00:28:38,920 --> 00:28:42,960
Speaker 2: But the tradition that built it was fundamentally fragile. It

586
00:28:43,000 --> 00:28:47,279
was confined to these specialized, undocumented workshops and dependent on

587
00:28:47,319 --> 00:28:50,319
the whims of wealthy patrons. It just couldn't survive the

588
00:28:50,359 --> 00:28:51,720
collapse of the classical world.

589
00:28:51,799 --> 00:28:54,960
Speaker 1: The knowledge only survived globally because the Eastern Roman Empire

590
00:28:55,039 --> 00:28:58,000
kept the basic skills alive, and more importantly, because the

591
00:28:58,039 --> 00:29:02,599
Islamic world created a stable, practical institutional need for it.

592
00:29:02,880 --> 00:29:05,799
They valued its application, so they document it and developed it.

593
00:29:05,960 --> 00:29:08,720
Speaker 2: The lesson from this whole fifteen hundred year story seems

594
00:29:08,720 --> 00:29:13,920
pretty profound. Enduring technological progress requires a society that values

595
00:29:13,960 --> 00:29:17,000
the how the technee just as much as the what

596
00:29:17,519 --> 00:29:21,480
the epistem. If you fail to document and institutionalize the craft,

597
00:29:21,720 --> 00:29:22,839
it's just going to dissolve.

598
00:29:22,960 --> 00:29:26,160
Speaker 1: You know, there's a fascinating philosophical echo here. We mentioned

599
00:29:26,160 --> 00:29:29,119
how in the Middle Ages some religious statues were built

600
00:29:29,119 --> 00:29:31,759
with internal mechanisms to make them move, like the Root

601
00:29:31,799 --> 00:29:34,240
of Grace. People saw it as a miracle right.

602
00:29:34,240 --> 00:29:37,400
Speaker 2: Until the Reformation, when critics broke them open, showed everyone

603
00:29:37,440 --> 00:29:40,039
the levers and gears and called it trickery and fraud.

604
00:29:40,440 --> 00:29:44,400
The mechanical explanation for them completely negated the sacred meaning,

605
00:29:44,759 --> 00:29:45,559
which raises a.

606
00:29:45,519 --> 00:29:48,599
Speaker 1: Really powerful question for our own time. Today, we're building

607
00:29:48,599 --> 00:29:52,920
ever more sophisticated systems AI robotics that are designed to

608
00:29:53,079 --> 00:29:57,279
mimic consciousness, to mimic life itself. Do we still feel

609
00:29:57,319 --> 00:30:01,880
that same philosophical discomfort when mechanism gets too close to magic?

610
00:30:02,000 --> 00:30:04,519
That's a great question. We love the automation, but when

611
00:30:04,599 --> 00:30:06,759
we see the code, when we see the gears behind

612
00:30:06,759 --> 00:30:10,000
the curtain, does it cheapen the illusion of sentience? Does

613
00:30:10,039 --> 00:30:14,119
our relentless technological progress force us to embrace the mechanical

614
00:30:14,200 --> 00:30:18,519
roots of magic? Or are we, like those sixteenth century reformers,

615
00:30:18,759 --> 00:30:21,319
compelled to reject it once we understand the trick.

616
00:30:21,559 --> 00:30:23,920
Speaker 2: What do you think is the biggest philosophical hurdle we

617
00:30:24,039 --> 00:30:27,119
face as our automated systems become more and more lifelike.

618
00:30:27,599 --> 00:30:30,119
Speaker 1: We'll leave you to ponder that thought until next time.

619
00:30:30,400 --> 00:30:32,200
Keep exploring those thrilling threads.