A dry stone wall is a purposeful pile of rocks, held in place by friction and gravity rather than mortar. It’s one of the oldest building methods known to mankind, used over millennia to construct ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. A big, round, 4,000 ...

Add Yahoo as a preferred source to see more of our stories on Google. Ancient civilizations accomplished feats of engineering that continue to challenge modern understanding. Despite advances in ...

Archaeologists excavated some ruins in Mexico City and found an ancient ritual offering: a stone box with dozens of knives, photos show. Photo from Mauricio Marat and INAH Hidden by dirt and forgotten ...

Rammed earth construction is an ancient building technique that occasionally sneaks into new structures. This old-meets-new ethos is embodied in twin villas nestled into a lush Costa Rica hillside ...

A controversy has erupted in Northern France after dozens of ancient standing stones were destroyed to make way for a hardware superstore. Roughly 39 stones, dating back at least 7,000 years were ...

Archaeologists in Greece have hit the jackpot with the unearthing of a magnificent ancient structure, complete with marble ...

Over 500 ancient stone monuments dot the rolling hills of southwestern Spain. La Torre-La Janera stretches across 220 acres in Huelva province. Prehistoric humans built this sacred landscape starting ...

A wind whips up dust on the desolate landscape of Harrat Uwayrid, the volcanic plateau that rises above the sandstone valleys of AlUla in Saudi Arabia. Across the flat plain, shades of gray-brown soil ...