Across Egypt, drill holes and stone cores show strange grooves and machining signatures carved into granite, basalt, and diorite. Researchers say some of these marks look like spiral cutting, implying ...
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How the Ancients May Have Cut Stone with Sound
The ancient world is filled with stone monuments so precise, they baffle modern engineers. Did early civilizations possess tools we’ve lost — or did they use something far more advanced? This video ...
PENZANCE, England (RNS) — On a gray afternoon in November, a group of 19 people gathered outside the Church of St. Buryan, an iconic medieval parish with a 92-foot granite tower that dominates the ...
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