It's either one of the greatest archaeological discoveries of our time, or man has made a giant pyramid out of a molehill. In the wake of recent news that evidence of colossal pyramids had been found in the small Bosnian town of Visoko, many in the archaeological community are speaking out and dismissing both the discovery and the man who made it, businessman Semir Osmanagic.Some critics have gone as far as to call the pyramid an absurd publicity stunt.But Osmanagic stands by his claim."They are jealous," Osmanagic told LiveScience in a telephone interview. "These people are going crazy because they've been teaching students that these [Bosnians] were cavemen, and all of a sudden they are finding complex structures here."Osmanagic first noticed the irregularly shaped hills on a trip to the town, located 18 miles north of Sarajevo, in April of 2005. Preliminary digging uncovered mysterious slabs in a stone not native to the immediate area. Further excavation of the hills in April of this year, along with the incredible announcement that one would be much larger than the great pyramid of Cheops at Giza, Egypt, prompted the most recent news release.Satellite images, thermal analysis and radar studies have been performed at the site, all independently confirming the existence of pyramid-shaped architecture, according to Osmanagic. More importantly, he said, the tests suggest that the layout could not have been man-made. Photos released by the media and made available on Osmanagic's website show a series of stone plates buried just beneath the top layer of soil and vegetation. Despite the tests and pictures, some archaeologists aren't convinced by his claims."Clearly there are voids or something similar in the rock, but that is a long way from saying these are man-made," said Anthony Harding, president of the European Association of Archaeologists. The pyramids could be upwards of 12,000 years old, Osmanagic has deduced, based on geological knowledge of the area. That is a main point of contention for specialists concerned with the archaeology in the Balkan region.