12,000 years ago the area that now forms the southern North Sea was dry land: a vast plain populated by Mesolithic hunter-gatherers. By 5,500 BC the entire area had disappeared beneath the sea as a consequence of rising sea levels. Until now, this unique landscape remained hidden from view and almost entirely unknown. The North Sea Palaeolandscape Project, funded by the Aggregates Levy Sustainability Fund, have mapped 23,000 km2 of this "lost world"...