A big piece of the puzzle for Randall Carlson.
Who's Randall Carlson?
Randall Carlson
Randall Carlson is an American architect, geological theorist, and anthropological theorist.
He is a proponent of the Younger Dryas impact hypothesis, and has theorized about the extinction of historical advanced human civilizations.
Carlson founded Sacred Geometry International, which focuses on a range of controversial theories and has a website and Facebook page.
Carlson’s theories have not been peer-reviewed or published in any scientific journals. He has appeared on the Joe Rogan Experience podcast multiple times, sometimes accompanying Graham Hancock, who promotes similar ideas.
https://en.wikipedia.org/wiki/Randall_Carlson
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Younger Dryas impact hypothesis
The Younger Dryas impact hypothesis or Clovis comet hypothesis originally proposed that a large air burst or earth impact of one or more comets initiated the Younger Dryas cold period about 12,900 BP calibrated (10,900 14C uncalibrated) years ago.[1][2][3]
The hypothesis has been contested by research showing that most of the conclusions cannot be repeated by other scientists, and criticized because of misinterpretation of data and the lack of confirmatory evidence.[4][5][6][7]
The current impact hypothesis states that the air burst(s) or impact(s) of a swarm of carbonaceous chondrites or comet fragments set areas of the North American continent on fire, causing the extinction of most of the megafauna in North America and the demise of the North American Clovis culture after the last glacial period.[8]
The Younger Dryas ice age lasted for about 1,200 years before the climate warmed again. This swarm is hypothesized to have exploded above or possibly on the Laurentide Ice Sheet in the region of the Great Lakes, though no impact crater has yet been identified and no physical model by which such a swarm could form or explode in the air has been proposed.
Nevertheless, the proponents suggest that it would be physically possible for such an air burst to have been similar to, but orders of magnitude larger than, the Tunguska event of 1908.
The hypothesis proposed that animal and human life in North America not directly killed by the blast or the resulting coast-to-coast wildfires would have likely starved on the burned surface of the continent.
https://en.wikipedia.org/wiki/Younger_Dryas_impact_hypothesis