Let me recite Graham Hancock-Santha Faiia in a nut-shell.
“The globe, 3000 years before the end of the last Ice-Age and melt-down, faced an enormous collision with an asteroid (around 9000 years ago). This resulted in a chain reaction of earthquakes, geological deformations and tidal waves.
Paleo-magnetic investigations reviled that the magnetic poles of our earth changed by 180º around 12,400 years ago“.
Human life and culture were undeniably affected by these catastrophes.
The disappearance of many land mammals.
In just a few seconds 10-12,000 years ago the face of the earth was almost wiped clean and the rest is a story of “re-emergence“.