Researchers continue to expand the case for the Younger Dryas Impact hypothesis. The idea proposes that a fragmented comet smashed into the Earth’s atmosphere 12,800 years ago, causing a widespread climatic shift that, among other things, led to the abrupt reversal of the Earth’s warming trend and into an anomalous near-glacial period called the Younger Dryas.
New study reveals comet airburst evidence from 12,800 years ago
This idea will not die. It has been brought up and refuted multiple times. They do seem to be getting more data, at least. I think part of the reason for the endless research is that the public loves this and money is pushed at it.
Another take on the rubble cloud.