The Grand Canyon: How It Formed | PBS LearningMedia
The Grand Canyon: How It Formed | PBS LearningMedia
Jan 1, 2009
pbslearningmedia.org
2.6K views · 116 reactions | To build the breathtaking Skywalk Glass Bridge over the Grand Canyon, workers constructed the horseshoe-shaped walkway 50 feet back from the edge, and then slowly rolled it out over the canyon—a system used by the ancient Egyptians to build their pyramids. #25DaysofGetaways Tune into back-to-back episodes of How Did They Build That, hosted by Jay Ellis, starting at tonight at 8 PM! | Smithsonian Channel | Facebook
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2.6K views · 116 reactions | To build the breathtaking Skywalk Glass Br…
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