Ancient Technology (Introduction)
by David Turell 
, Saturday, January 01, 2011, 14:55 (5052 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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Balance_Maintained,
2010-12-16, 06:46
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xeno6696,
2011-01-01, 14:41
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David Turell,
2011-01-01, 14:55
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2011-01-01, 18:21
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- Ancient Technology -
romansh,
2011-01-01, 18:21
- Ancient Technology -
David Turell,
2011-01-01, 14:55
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xeno6696,
2011-03-23, 11:40
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- Ancient Technology -
xeno6696,
2011-01-01, 14:41