Mysterious Scottish Petrospheres

Carved Stone Balls are petrospheres, usually round and rarely oval. They have from 3 to 160 (but usually six) protruding knobs on the surface. Their size is fairly uniform at around 2.75 inches or 7 cm across, they date from the late Neolithic to possibly as late as the Iron Age, and are mainly found in Scotland, but also elsewhere in […]