By Daily Mail Reporter
Last updated at 12:09 PM on 6th June 2011
It was previously thought that huge monuments, including Windmill Hill in Wiltshire and Maiden Castle in Dorset, spread slowly across the country over five centuries during the Neolithic period from 4000 to 2000BC.
But researchers now believe that causewayed enclosures, a type of early Neolithic earthwork, were rapidly erected all over southern England in just 75 years...
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