Doggerland = Middle Earth?

I saw this map on the internet last night.

It is Great Britain and North West Europe circa 15,000 BCE.

Tell that doesn't just fill you with all sorts of ideas.  This was during the Upper Paleolithic era, or late Stone Age.

NOW.  compare that to this map we all all know and love.

I don't know about you all, but my head is full of ideas!