The Van Danniken school of ancient mysteries tends to obfuscate the actual who dunnit. There was a near extinction level event in historic times called the Younger Dryas Event that comes down to us in the form of the Biblical flood myth. But this myth exists in the origins of all ancient stories - a period of fecundity destroyed by an epoch of upheaval. Immanuel Velikovsky, and Ignatius Donnelley, began this research and it continues in the works of David Talbott, Dwardu Cardona and Ev Cochrane. Google is your friend. Curiosity is your friend.
Silliness and superstition on baseless writings is my enemy :)
have a good one :)
I don’t think the flood event was the same as the Younger Dryas Event. I think the flood came later. There are some ideas about Black Sea flooding that I found interesting.