[Strategerist]

There's no evidence whatsoever of a simultaneous worldwide flood of all land, ever, really, much less in the last 10,000 years.

Sorry.

[Wonder Warthog]

"There's no evidence whatsoever of a simultaneous worldwide flood of all land, ever, really, much less in the last 10,000 years."

Well, actually there is. When the glaciers melted at the end of the last ice age, there "was" widespread flooding over large parts of the earth, and much land that was above sea level was submerged. A lot of that land was probably occupied by humans, and the oral transmission of the histories of the survivors probably was the source of the "universal flood" legends in many or most religions.