{"id":"firestone2007evidence","DOI":"10.1073/pnas.0706977104","URL":"https://doi.org/10.1073/pnas.0706977104","type":"article-journal","title":"Evidence for an extraterrestrial impact 12,900 years ago that contributed to the megafaunal extinctions and the Younger Dryas cooling","author":[{"given":"R. B.","family":"Firestone"},{"given":"A.","family":"West"},{"given":"J. P.","family":"Kennett"},{"given":"L.","family":"Becker"},{"given":"T. E.","family":"Bunch"},{"given":"Z. S.","family":"Revay"},{"given":"P. H.","family":"Schultz"},{"literal":"and others"}],"issued":{"date-parts":[[2007]]},"year-text":"2007","container-title":"Proceedings of the National Academy of Sciences 104(41), 16016–16021","catalog-key":"SRC0D51WPR222ST"}