"The sphere could have actually been produced by a natural occurrence known as concretion" 'Concretion: The Enigmatic Stone Spheres of Franz Josef Land' http:

"The sphere could have actually been produced by a natural occurrence known as concretion" 'Concretion: The Enigmatic Stone Spheres of Franz Josef Land' http://www.urbanghostsmedia.com/2015/07/stone-spheres-concretion-franz-josef-land/ http://www.urbanghostsmedia.com/2015/07/stone-spheres-concre...