The stone spheres of Costa Rica are one of the strangest mysteries in archaeology. CNN's Jonathan Mann reports.
원문출처 : http://edition.cnn.com/video/data/2.0/video/world/2015/02/05/spc-gt-pkg-mann-costa-rica-stone-spheres.cnn.html?eref=edition
원문출처 : http://edition.cnn.com/video/data/2.0/video/world/2015/02/05/spc-gt-pkg-mann-costa-rica-stone-spheres.cnn.html?eref=edition