ONLINE ONLY - Suad Keserovic cleans a stone ball in Podubravlje village near Zavidovici, Bosnia and Herzegovina April 11, 2016. Keserovic claimed that the stone sphere is 3.30 meter in diameter ...

A LARGE stone ball dating from the 13th century which was used during a siege of Edinburgh Castle has been discovered by archaeologists. The large carved stone looks like a cannon ball but has been… ...

Stonehenge builders 'used ball bearings to move giant slabs of stone into position' By DAILY MAIL REPORTER Updated: 07:32 EDT, 19 November 2010 ...