[8bitsrule]

The evidence for multiple strikes around 12,800BP has been piling up for quite a few years now. There are other theories of course. A few papers :

Alaska - https://dx.doi.org/10.1086/695703

South Carolina - www.nature.com/articles/s41598-019-51552-8 (plus Article: https://theconversation.com/new-evidence-that-an-extraterres... )

Chile - https://www.nature.com/articles/s41598-018-38089-y

South Africa - https://dx.doi.org/10.1016/j.quascirev.2014.06.017

Syria - https://dx.doi.org/10.1038/s41598-020-60867-w

California, Channel Islands - https://dx.doi.org/10.1016/j.quascirev.2008.09.006