Comets Over Canada...Or Not?

I have written previously about Allen West's theory re a comet or other extraterrestrial object exploding over Canada 13,000 years ago and bringing an end to the Clovis Culture, triggering the Younger Dryas, and causing the extinction of the mammoth.

Well, science marches on. A new paper (Paleoindian demography and the extraterrestrial impact hypothesis) has appeared testing the first of these three conclusions:

The impact is also claimed to have caused major cultural changes and population decline among the Paleoindians. Here, we report a study in which ≈1,500 radiocarbon dates from archaeological sites in Canada and the United States were used to test the hypothesis that the ET resulted in population decline among the Paleoindians.

[...]

The results of the analyses were not consistent with the predictions of extraterrestrial impact hypothesis. No evidence of a population decline among the Paleoindians at 12,900 ± 100 calBP was found. Thus, minimally, the study suggests the extraterrestrial impact hypothesis should be amended.

Ah well. Pity. I am partial to any theories that involve stuff exploding in the sky.

And I know nobody reads these sciency-type posts. I still enjoy doing them, especially when writing about politics starts to make me feel unclean.

H/t Afarensis.