But the redditors nicked it, via Nat Geo, from the below authors;
Sources: Simon Fitch and Vincent Gaffney, U of Birmingham, UK;
North Sea Paleolandscapes Project
Gaffney, V., Thomson, K., Gaffney, V., Thomson, K., Fitch, S., Fitch, S., & Goodchild, H. (2007). Heritage Management and the North Sea Palaeolandscapes Project. In Mapping Doggerland: the Mesolithic Landscapes of the Southern North Sea