New research into an ancient timber circle discovered on a Norfolk beach and dubbed “Seahenge” suggests it was created in response to a period of extreme climatic deterioration at the close of the third millennium BC. New research into an ancient timber circle discovered on a Norfolk beach and dubbed “Seahenge” suggests it was created in response to a period of extreme climatic deterioration at the close of the third millennium BC. Archaeology Phys.org – latest science and technology news stories