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The invention of the safety elevator was the first of many innovations that made skyscrapers like the Burj Dubai possible.Big, Bigger, Biggest: Skyscraper : THURS APRIL 10 9P et/pt : http://channel.nationalgeograp...

Channel: Travel & Events
Uploaded: January 1, 1970 at 12:59 am
Author: NationalGeographic

Length: 03:22
Rating: 4.82
Views: 9211

Tags: Big  Bigger  Biggest  History  Skyscraper  

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Video Comments

lostnyc2 (January 1, 1970 at 12:59 am)
"Where are the other five? (inventions)"Well, he left out these likely candidates:Steel framework with a curtain wall facade- eliminating massive foundations and 10 foot thick brick walls at the ground floor.Electricity- early elevators ran on steam, engines- limited in many way.Bessemer's invention with processing steel which made steel structures cheap and mass produceable.Lastly, I would add steel piles and pile drivers to drive them to bedrock for foundations.
billybandol (January 1, 1970 at 12:59 am)
yes,seems to be a circuit.On decadence follows war and then poorness and brotherhood.
JiveDadson (January 1, 1970 at 12:59 am)
Every time a new highest skyscraper has been built since the 1900's, there followed a world-wide economic recession.
Dabu3 (January 1, 1970 at 12:59 am)
He says seven ingenious inventions, but only shows two! Where are the other five?
Leo92112 (January 1, 1970 at 12:59 am)
New video:UFO, Bratislava, Skyscrapesrs, Towers Please comments.
shonshons (January 1, 1970 at 12:59 am)
The narrator is wrong. Burj Dubai is estimated to be 800 meters. He said it is nearly half a kilometer tall(near 500m).
LlamaZruleZ (January 1, 1970 at 12:59 am)
Not just tourism, they have a lot of companies and business's there.It's like new york but warmer.
zimfromBM (January 1, 1970 at 12:59 am)
fuck me that thing is big
raggyrnmba (January 1, 1970 at 12:59 am)
Half a mile is 800 meters approx.
IronPillaz (January 1, 1970 at 12:59 am)
where can I watch the rest of that doco? Very cool