Could a prehuman industrial civilization have existed on the Earth millions of years ago? If it did how could we detect it's existence?
This is how coast line of Sunda shelf looked like in Upper Paleolithic:
Extend it to the entire world coast line, e.g. 20k years ago, till now.. and you will have answer for Flood Myth.
If increase of temperature, because of global warming, will continue melting ice, you will have Flooding v2.0.