Secrets of Stonehenge

Every year, a million visitors are drawn to Salisbury Plain, in southern England, to gaze upon Stonehenge, a mysterious circle of stones that is arguably the best-known and most mysterious relic of prehistory. During the 20th century, excavations revealed that the structure was built in stages and that it dates back some 5,000 years to the late Stone Age, but its purpose remains a mystery. Now, investigations inside and around Stonehenge have started a dramatic new era of discovery and debate. Who built Stonehenge? What was its purpose? How did prehistoric people quarry, transport, sculpt and erect the giant stones? A new generation of researchers is tackling these questions and finding important clues in the landscape surrounding Stonehenge, one of the densest concentrations of prehistoric structures in the world. Ⓢ