A 30-metre “pyramid” submerged just off the coast of Japan is turning heads — and could shake up everything we thought we knew about ancient civilisations.

At first glance, they resembled tiny, uniform tubes—barely half a millimeter wide and up to three centimeters long—running in parallel formations through the stone. Later expeditions ... who first ...

"Those brave enough to walk across the ledge will appear to levitate above the ground below, as if on a magic carpet made of ...