Why did the builders of Stonehenge, West Kennett Long Barrow and Silbury Hill disappear….?

  I have just been watching an episode of Blowing up History, in which the prehistoric stone monuments at Stonehenge, West Kennett and Silbury Hill were investigated. The discovery of a large upturned bell-shaped pottery jar at West Kennett led to the revelation that it was the work of the so-called Beaker People of Europe,…