Evidence for an extraterrestrial impact 12,900 years ago that contributed to the megafaunal extinctions and the Younger Dryas cooling.
Firestone RB, West A, Kennett JP, Becker L, Bunch TE, Revay ZS, Schultz PH, Belgya T, Kennett DJ, Erlandson JM, Dickenson OJ, Goodyear AC, Harris RS, Howard GA, Kloosterman JB, Lechler P, Mayewski PA, Montgomery J, Poreda R, Darrah T, Hee SS, Smith AR, Stich A, Topping W, Wittke JH, Wolbach WS.
Firestone RB, et al. Among authors: mayewski pa.
Proc Natl Acad Sci U S A. 2007 Oct 9;104(41):16016-21. doi: 10.1073/pnas.0706977104. Epub 2007 Sep 27.
Proc Natl Acad Sci U S A. 2007.
PMID: 17901202
Free PMC article.