A giant Sphere discovered in Bosnia

What is this mysterious rocky sphere buried in the ground? The archaeologist Semir Osmanagich made the strange discovery in a forest Zavidovici in Bosnia. According to observations made, the weight of the structure is estimated at nearly 30 tons. Side dimensions, its radius would be between 1.2 and 1.5 meters.

According to the archaeologist, this rock is not natural but shaped by the human hand. He also added that the sphere contains a large metal content. To Semir Osmanagich, this discovery would be proof of the existence of a very advanced civilization on this territory there are 1500 years. A civilization with a different technology from ours which archaeologists have found no record ...

This theory is far from convinced all the experts. According Mandy Edwards of the Scool of Earth, Atmosphere and Environmental Sciences of the University of Manchester, the object would be formed naturally by the meeting of several chemical body solidifying together: a phenomenon called concretion. Erosion could then have perfect form.