When you see the extent of lake Bonneville and other western basin lakes 20,000 years ago, if humans were there (and I don’t know why they wouldn’t have been) they were seafarers and the mountain tops were islands.
Something destroyed any civilization that could have existed and took all of the megafauna with it.
And kids today are worried about 1 foot of sea level rise in 100 years.
Something destroyed any civilization that could have existed and took all of the megafauna with it.
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The comet strikes of 10,800 BC. See: the Carolina Bays, the Nebraska Rain Water Basins, and Graham Hancock’s “America Before” for a description of the events that lasted 100 years and ushered in the Younger Dryas Age, leaving a thick burned residue (Black Mat) over most of the Northern Hemisphere from the mega firestorms.