Carrowmore in the largest cemetery of megalithic tombs in Ireland, with 5,500-year-old passage tombs dating from 3,600 BC. Archaeologists Dr Marion Dowd and Dr James Bonsall directed the excavation of a site that was formerly known as a barrow. Barrows are circular earthen monuments surrounded by a circular ditch. These sites typically date to the Bronze Age and Iron Age, ranging from between 4,000 and 1,500 years old. The excavation has revealed that some unexpected results – that the monument isn’t a barrow at all... The team found that the circular ditch surrounded a central raised area that consisted of...