Joe Rogan: EVIDENCE for the YOUNGER DRYAS Impact

The Younger Dryas impact hypothesis (YDIH) or Clovis comet hypothesis is a speculative attempt to explain the onset of the Younger Dryas (YD) cooling at the end of the Last Glacial Period, around 12,900 years ago.[citation needed]The hypothesis is controversial and not widely accepted by relevant experts.[1][2][3]

It is an alternative to the long-standing and widely accepted explanation that it was caused by a significant reduction in, or shutdown of the North Atlantic Conveyor due to a sudden influx of freshwater from Lake Agassiz and deglaciation in North America.[4][5][6][7] The YDIH posits that fragments of a large (more than 4 kilometers in diameter), disintegrating asteroid or comet struck North America, South America, Europe, and western Asia, coinciding with the beginning of the Younger Dryas cooling event.[citation needed] Advocates proposed the existence of a Younger Dryas boundary (YDB) layer that can be identified by materials they interpret as evidence of multiple meteor air bursts and/or impacts across a large fraction of Earth’s surface.[8] However, inconsistencies have been identified in the graphs they published, and authors have not yet responded to requests for clarification and have never made their raw data available.[9] Some YDIH proponents have also proposed that this event triggered extensive biomass burning, a brief impact winter and the Younger Dryas instance of abrupt climate change, contributed to extinctions of late Pleistocene megafauna, and resulted in the end of the Clovis culture.[10][11]