The archaeologist behind the uncovering of Bosnia’s Valley of the Pyramids has announced the discovery of what may be the world’s oldest manmade stone sphere, at a site near the town of Zavidovici, Bosnia. "It is once again further proof that there was an advanced civilization here with a high level of technology about which we know very little," remarks Dr. Semir Osmanaigc.

Dr. Osmanaigc is excavating the partially-exposed sphere, which is currently protruding about five feet out of an embankment. The sphere resembles hundreds of manmade stone spheres that were found in Costa Rica, that were dated to 1,500 years ago, although the unevenness of it’s surface, and the depth that it is embedded into the ground suggest a much older age. According to one of Osmanaigc, the stone was probably not alone, as there were reportedly hundreds of them found across Bosnia, but only fifteen intact specimens remain, with the rest having been destroyed over the years.

Critics are quick to point out that the sphere might simply be a natural formation, caused by a process called concretion, where round stones are formed by the precipitation of mineral cement within the spaces between particles in sedimentary rock or soil. However, this isn’t to say that the sphere could be a natural concretion that was further rounded by human sculptors at a later date.