Never heard of Boulognia? Nor had I. But apparently its the land beneath the English Channel when it was land (different sea levels). I wonder if something that sounds like it should be sliced and put between bread will ever catch on?
The term is mentioned in the report on research saying Neanderthals were in Britain way before scientists okay'd them to be there. Tut tut. Don't people ever listen? Not yet! Wait for the thaw, doofus.
Still the whole idea of land bridges and flooded worlds (hence Boulognia) and adventurous wanderers is fantastic.
I'm fascinated that humans once shared the world with another sentient species.