A new scientific dating technique has revealed there was a building spree more than 5,500 years ago, when many of the most spectacular monuments in the English landscape, such as Maiden Castle in Dorset and Windmill Hill in Wiltshire, were built, used and abandoned in a single lifetime. The fashion for the monuments, hilltops enclosed by rings of ditches, known to archaeologists as causewayed enclosures, instead of being the ritual work of generations as had been believed, began on the continent centuries earlier but spread from Kent to Cornwall within 50 years in about 3700 BC. Alex Bayliss, an archaeologist...