Alright, so here’s the mystery: in Costa Rica, there are these giant stone spheres scattered around, and no one knows for sure who made them. They’re perfectly round and date back to ancient times, ...

An analysis of 150 round, baseball-sized stones found at a site where early humans lived 1.4 million years ago shows that they were intentionally knapped into spheres. This rules out the idea that ...

Archaeologists from the University of Bristol have suggested that mysterious stone spheres found at various ancient settlements across the Aegean and Mediterranean could be playing pieces from one of ...