theclumsiestninja Uncategorized September 22, 2017 1 Minute systlin: GUYS THEY FIGURED OUT THE ROMAN CONCRETE RECIPE THAT MAKES IT IMMUNE TO SEAWATER http://www.msn.com/en-us/news/technology/mystery-of-2000-year-old-roman-concrete-solved-by-scientists/ar-BBDO5VC Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook Like Loading... Related Published by theclumsiestninja View all posts by theclumsiestninja Published September 22, 2017
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