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History of Technology Videos 160 videos
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History of Technology 5: New Building Materials 36 Views
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Description:
New building materials both made homes stronger than ever before, and made wolves work harder than ever on their lung strength.
Transcript
- 00:02
In the ancient world, people started to build bigger, better, and stronger homes. [Wolf blows at a house]
- 00:06
Why?
- 00:08
Because populations became big enough and centralized enough to require them. [City appears in the desert]
- 00:13
Stronger homes also helped keep away those pesky door-to-door salesmen. [Man with a briefcase knocks on the door]
- 00:17
Enter: new materials and designs. [Salesman falls down a trap door]
Full Transcript
- 00:20
Ancient civilizations, like Egypt, Rome, Greece, Persia, China, and the Mayan cultures, to name a few, built [Pictures of constructions]
- 00:27
some of the grandest and most impressive structures in the world.
- 00:31
And they didn't have a single crane, bulldozer, or dump truck between them.
- 00:35
Nothin' like good ol' fashioned slave labor to get the job done…well, not all of it [Man dressed in rags pulling a large rock]
- 00:40
was slave labor…
- 00:41
Still, any amount of slave labor is too much slave labor.
- 00:46
But back to building materials…
- 00:48
First and maybe foremost, ancient peoples kept on building with mud…. [Man chucks mud at another man]
- 00:52
…but with time, they got way better at it, transforming mud into hard, dry bricks. [Man putting wood into a fire]
- 00:58
In places like ancient Egypt, bricks were formed out of clay and mud and baked in the
- 01:03
sun.
- 01:04
It also gave ancient Egyptians a great chance to work on their tans and pores. [Man sits on hot mud bricks and gets burned]
- 01:09
Egyptians also came up with mortar, which is a mixture of sand and clay that helped [Bricklayer building a wall]
- 01:13
hold their bricks together.
- 01:15
This same process was used to build mud and brick skyscrapers.
- 01:20
Talk about luxury.
- 01:21
Wonder if there were doormen.
- 01:23
The Romans were the first to figure out how to bake their bricks in kilns to make them [Man putting bricks into a kiln]
- 01:28
stronger. [Brick with arms lifting weights]
- 01:30
The structures they built could therefore be taller and last longer in the weather. [Picture of a castle]
- 01:35
The Romans were basically architectural wizards, and they didn’t even have Hogwarts.
- 01:40
Need more proof of their architectural magic?
- 01:42
Well, how about this: Romans came up with concrete. [Man dressed as a wizard makes a bag of concrete appear with a wand]
- 01:45
Yup.
- 01:46
We know, concrete doesn't seem like an ancient thing…
- 01:48
…but lo and behold, Roman engineers figured out how to blend lime, sand, and natural cement
- 01:54
together to make actual-factual concrete. [Man mixing ingredients in a barrel]
- 01:57
And sure, it took them a while to stop using the citrus fruit, but they figured it out
- 02:02
eventually.
- 02:03
Concrete allowed them to build aqueducts, roads, and buildings. [Pictures of Roman contructions]
- 02:07
And all those cool things would have been super useful in the Middle Ages, except apparently,
- 02:12
some raging barbarians lost the recipe. [Barbarian rips up the recipe for concrete]
- 02:17
Nice work there, raging barbarians.
- 02:18
This is why the Middle Ages couldn't have nice things.
- 02:22
Anyway.
- 02:24
Concrete also helped with the construction of large domes in buildings. [Man dressed as a wizard makes a large dome appear on the top of a building]
- 02:27
Y'know, those bulbous creations, which magically manage to not collapse in a few millennia?
- 02:32
Yup.
- 02:33
Concrete.
- 02:34
Before the Romans, nobody had figured out how to make a domed ceiling. [Man looking at the ceiling scratching his head]
- 02:39
It's a bit of an engineering and mathematical puzzle.
- 02:41
But the Romans built one that remained the largest dome in the world for more than 1,000
- 02:46
years
- 02:48
Romans also brought us plaster.
- 02:50
…Okay, they didn't strictly invent plaster, because other people had the idea of putting [Roman man plastering a wall]
- 02:54
lime and clay on their walls.
- 02:56
But the Romans definitely used it to a new extent, which made their homes a lot…homier. [Man sipping a drink sat in a luxury room]
- 03:01
Sorry, next time we’ll try harder with our adjectives. [Thesaurus is chucked at the Shmoop house]
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