Excavations at an archaeological site in Bahrain are shedding light on one of the oldest trading civilisations. The site in Bahrain, thought to be the location of the enigmatic Dilmun civilisation Dilmun, one of most important ancient civilisations of the region and said to date to the third millennium BC, was a hub on a major trading route between Mesopotamia - the world's oldest civilisation - and the Indus Valley in South Asia. It is also believed that Dilmun had commercial ties with ancient sites at Elam in Iran, Alba in Syria and Haittan in Turkey. "For 4,000 years this...