Why Roman Concrete Outlasts Ours by Thousands of Years
Modern concrete crumbles in decades, but ancient Roman harbors still stand after 2,000 years under seawater. Here is the volcanic secret behind Roman concrete.
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Lost Technologies
The Lost Recipe of Damascus Steel
Ancient Damascus blades were so strong they could cut through stone. Discover why the formula was lost to history and the modern science of carbon nanotubes.
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