This necklace strung from blue glass beads looks modern, but it dates to the Late Bronze Age some 3,100 years ago. It was found in 1885 when a farmer ploughed up a cremation urn at Kongehoj in Denmark. Analysis shows the beads were made in Mesopotamia or present-day Iraq over 3000 years ago, providing evidence of trade connections between Europe and the Middle East as early as that.