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Joined: Feb 2015
Posts: 8,276 Likes: 23
14 point
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14 point
Joined: Feb 2015
Posts: 8,276 Likes: 23 |
I don't know, but look at how long the Egyptian pyramids have lasted. When I toured Hoover Dam, they made a comment about how long the dam would last barring an earthquake or other natural or man made disaster. The pyramids are made from solid stone rocks, not 1930’s industrial concrete. The Romans invented hydraulic concrete, some of which is still survives to this day.The Pantheon Dome in Rome is one example.
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