Scattered across the Roman Empire are thousands of colossal granite monoliths — towering columns carved from single stone ...

The "walking moai hypothesis" could end a long-time debate over how ancient engineers moved these iconic statues around ...

Four rammed-earth monoliths occupy prominent real estate in downtown Tucson. The monoliths stand at the northwest corner of West Congress Street and Interstate 10, in Sentinel Plaza. The hard-to-miss ...