Geologists studying ancient desert rocks have stumbled on a microscopic tunnel system that looks uncannily deliberate, a lacework of hair-thin tubes that slice through solid stone in repeating ...
SAN SALVADOR, El Salvador — Workers building a wall around a school uncovered four carved rocks that an archaeologist says date from the time of Jesus Christ. The discovery took place on March 6 in ...
Long ago, when Romans wanted to build a new temple, they would head to the nearby quarries of Tivoli, chisel out blocks of porous rock called lapis tiburtinus — now known as travertine — and float the ...
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