Researchers in Costa Rica Unearth A Nearly ‘Perfect’ Massive Stone Sphere

Excavations in Costa Rica have revealed a massive — nearly perfect — stone sphere, prompting experts to ask how such precision was achieved thousands of years ago.  “We have studied the terrain in which there are more than 15 of these spheres, and some are placed beside areas that give access to residential buildings as if they were placed there to welcome you. They were used as a sign of…