In Britain, fresh light is cast on the enigma of Stonehenge as dozens of volunteers use ropes and wooden sledges to erect replicas of the massive stones originally raised 4,000 years ago. Their task involves more than brute force, since the question of how the lintels that bridge the uprights were raised and leveled continues to baffle scholars and engineers alike. The meaning of Stonehenge to its builders and the purpose of the astronomical alignments built into its structure also figure in this match between muscles and megaliths.
