Revellers celebrate the pagan festival of 'Winter Solstice' at Stonehenge in Wiltshire, England on December 21, 2012

Revellers celebrate the pagan festival of ‘Winter Solstice’ at Stonehenge in Wiltshire in southern England on December 21, 2012. British researchers on Saturday unveiled a new theory for the origins of Stonehenge, saying the ancient stone circle was originally a graveyard and venue for mass celebrations.