Before you put me in the same category as Von Daniken, hear me out.
When the ice spread across Europe, it basically annihilated everything and changed the landscape. New valleys and fjords later emerged where there had been none.
My reason for asking such a speculative question is partly related to the extraordinary age of the Göbekli Tepe site in Turkey, and the fact that in order to raise such structures skills are needed which presuppose organized learning of some sort.
Today archaeology has moved down at almost a molecular level. And I thought this might make it possible to search for clues of what preceded the ice-age in a new way. So, the question is does the evidence exist, and is any search feasible?