LONDON (AP).- Scientists scouring the area around Stonehenge said Thursday they have uncovered a circular structure only a few hundred meters (yards) from the world famous monument. There’s some debate about what exactly has been found. The survey team which uncovered the structure said it could be the foundation for a circle of freestanding pieces of timber, a wooden version of Stonehenge. But Tim Darvill, a professor of archaeology at Bournemouth University in southern England, expressed skepticism, saying he believed it was more likely a barrow, or prehistoric tomb. Darvill did say that the circle was one of an expanding number of discoveries being made around Stonehenge which “really shows how much there is still to learn and how extensive the site really was.” “In its day Stonehenge was at the center of the largest ceremonial center in Europe,” he said. The stonehenge that is visible today is thought to have been completed about 3,500 years ago, although the first earthwork