Constructing the Hoover Dam
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8 سال پیش
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When it was originally built,
When it was originally built, the Hoover Dam was the largest concrete structure in the world. It weighs 6.6 million tons and stands 700 ft tall. The biggest challenge engineers faced while building the dam was the extreme heat.
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#ImpossibleEngineering
Wednesdays 9/8 on Science
http://www.sciencechannel.com/tv-show...
Subscribe to Science Channel: http://bit.ly/SubscribeScience
Check out SCI2 for infinitely awesome science videos. Every day. http://bit.ly/SCI2YT
Download the TestTube app: http://testu.be/1ndmmMq
8 سال پیش
در تاریخ 1395/01/25 منتشر شده
است.
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