We're already far afield, so here's the book about the megafauna extinction you mention:
The Cycle of Cosmic Catastrophes:
Flood, Fire, and Famine
in the History of Civilization
by Richard Firestone,
Allen West, and
Simon Warwick-Smith
Perhaps Clovis, Atlantis and Noah’s Ark are all the same?
Some day we’ll know.
Perhaps Clovis, Atlantis and Noah’s Ark are all the same?
Some day we’ll know.