Cloaked by time's leafy shroud, the prehistoric settlement of Gaer Fawr lies all but invisible beneath a forest in the lush Welsh countryside. Commanded by warrior chiefs who loomed over the everyday lives of their people, the massive Iron Age fortress once dominated the landscape. Now the 2,900-year-old structure lives again, thanks to a digital recreation following a painstaking survey by the Royal Commission on the Ancient and Historical Monuments of Wales... The study involved thousands of measurements taken in 2007, which were used build a digital terrain model of the 21-acre (5.8-hectare) site. Measurements were made manually using lasers...