But experts say the five that he identified in Bosnia-Herzegovina are natural hills.Despite his many critics, maverick archaeologist Sam Osmanagich stands by his claims that he has uncovered not one, but five structures which he says are pyramids in Visoko in Bosnia-Herzegovina. Dr Osmanagich, who earned his doctorate on the history of civilisations at the University of Sarajevo in 2008, was in Singapore recently for a conference, where he spoke about his work on pyramids. The 55-year-old claims that he has discovered the "biggest complex of pyramidal structures in the world" comprising five pyramids, all connected by underground tunnels. The...