As a specialist in prehistoric underwater archaeology, Dr Jonathan Benjamin looks at rising sea levels differently from most people and his fascination with this global phenomenon began when as a PhD candidate at Edinburgh University he came across the work of the Danish archaeologists Anders Fischer and Søren H Anderson. In the 1970s and 1980s, Fischer and Anderson recovered some of the most well preserved material ever seen from sites such as the 6,500-year-old settlement at Tybrind Vig. This was the first submerged settlement excavated in Denmark and from 1977 was the scene of intensive archaeological activity. Lying 300m from...