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 ...

The distinctively fluted surface and elongated hills in this image in Medusae Fossae are caused by wind erosion of a soft fine-grained rock. Called yardangs, these features are aligned with the ...

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 ...

The Travertine Quarries That Built Ancient Rome Are Carving Rock for a New Generation of Temples TIVOLI, Italy (AP) — Long ago, when Romans wanted to build a new temple, they would head to the nearby ...