North America comet theory questioned

No evidence of an extraterrestrial impact 13,000 years ago, studies say.

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Surovell, T. A. et al. Proc. Natl Acad. Sci. USA advance online publication doi:10.1073/pnas.0907857106 (2009).
Firestone, R. B. et al. Proc. Natl Acad. Sci. USA 104, 16016-16021 (2007).
Article CAS ADS Google Scholar
Marlon, J. R. et al. Proc. Natl Acad. Sci. USA 106, 2519-2524 (2009).
Article CAS ADS Google Scholar
Kennett, D. J. et al. Proc. Natl Acad. Sci. USA 106, 12623-12628 (2009).
Article CAS ADS Google Scholar

Authors

Rex Dalton
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Dalton, R. North America comet theory questioned. Nature (2009). https://doi.org/10.1038/news.2009.997