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Comment
. 2021 Nov 19;374(6570):eabh1878.
doi: 10.1126/science.abh1878. Epub 2021 Nov 18.

Comment on "A global environmental crisis 42,000 years ago"

John Hawks  1
Affiliations
Comment

Comment on "A global environmental crisis 42,000 years ago"

John Hawks. Science. .

Abstract

Cooper et al. (Research Articles, 19 February 2021, p. 811) propose that a weakening geomagnetic field prior to the Laschamps Excursion explains megafaunal extinctions and human cultural changes that they claim happened 42,000 years ago. However, these authors misrepresent both the data and interpretations of cited work on extinctions and human cultural changes, so the specific claims they make about extinctions and cultural changes are false.

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Comment in

  • Response to Comment on "A global environmental crisis 42,000 years ago".
    Cooper A, Turney CSM, Palmer J, Hogg A, McGlone M, Wilmshurst J, Lorrey AM, Heaton TJ, Russell JM, McCracken K, Anet JG, Rozanov E, Friedel M, Suter I, Peter T, Muscheler R, Adolphi F, Dosseto A, Faith JT, Fenwick P, Fogwill CJ, Hughen K, Lipson M, Liu J, Nowaczyk N, Rainsley E, Ramsey CB, Sebastianelli P, Souilmi Y, Stevenson J, Thomas Z, Tobler R, Zech R. Cooper A, et al. Science. 2021 Nov 19;374(6570):eabh3655. doi: 10.1126/science.abh3655. Epub 2021 Nov 18. Science. 2021. PMID: 34793228

Comment on

  • A global environmental crisis 42,000 years ago.
    Cooper A, Turney CSM, Palmer J, Hogg A, McGlone M, Wilmshurst J, Lorrey AM, Heaton TJ, Russell JM, McCracken K, Anet JG, Rozanov E, Friedel M, Suter I, Peter T, Muscheler R, Adolphi F, Dosseto A, Faith JT, Fenwick P, Fogwill CJ, Hughen K, Lipson M, Liu J, Nowaczyk N, Rainsley E, Bronk Ramsey C, Sebastianelli P, Souilmi Y, Stevenson J, Thomas Z, Tobler R, Zech R. Cooper A, et al. Science. 2021 Feb 19;371(6531):811-818. doi: 10.1126/science.abb8677. Science. 2021. PMID: 33602851

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