Ancient Technology (Introduction)

by David Turell @, Saturday, January 01, 2011, 14:55 (5075 days ago) @ xeno6696

This shouldn't be too shocking... the concrete we use today is only 1 ingredient different from what the Romans used.-Not shocking. It is an ancient substance, and I think only recently explained. Unless I have recovered memory syndrome, I saw an article a number of years ago with a modern explanation of how it works.


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