Top 5 Most Amazing Feats of Ancient Engineering

shared by edgarrr on Sep 12, 2012 in Science

Top 5 Most Amazing Feats of Ancient Engineering

shared by edgarrr on Sep 12, 2012 in Science

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Want to build a giant stone structure? That's no problem thanks to today's heavy equipment and modern building practices. But imagine the work that went into building some of the engineering wonders o...
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