Enigmatic Stone Balls from 5,000 Years Ago Continue to Baffle Archaeologists
By Tom Metcalfe, Live Science Contributor | June 18, 2018 07:13am ET
Some of the most enigmatic human-made objects from Europe's late Stone Age — intricately carved balls of stone, each about the size of a baseball — continue to baffle archaeologists more than 200 years after they were first discovered.
More than 500 of the enigmatic objects have now been found, most of them in northeast Scotland, but also in the Orkney Islands, England, Ireland and one in Norway.
https://www.livescience.com/62843-enigmatic-stone-balls-scotland.html