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  • New species evolved within a few thousand years of the Chicxulub Impact

    From Pro Plyd@invalide@invalid.invalid to talk-origins on Sun Jun 7 19:32:14 2026
    From Newsgroup: talk.origins


    Don't recall seeing mention of this. From February, just
    came across it

    https://www.sciencenews.org/article/evolution-dinosaurs-chicxulub-asteroid

    https://archive.ph/Zy2W7

    In the long shadow of the asteroid that wiped out
    the dinosaurs, life appears to have bounced back
    with surprising speed.

    A new analysis of sedimentation rates suggests
    that the first wave of marine species emerged
    within a few thousand years of the mass extinction
    event, many millennia quicker than many scientists
    assumed.

    The findings, reported January 21 in Geology,
    invite a rethink of how rapidly evolution can
    rebuild biological diversity rCo not just as it did
    after the Chicxulub asteroid struck Earth
    66 million years ago, but perhaps also today and
    into the future as climate change and other human
    pressures accelerate the pace of ecological
    upheaval.

    rCLThis really helps us understand how quickly
    species can evolve,rCY says Christopher Lowery, a
    paleoceanographer at the University of Texas at
    Austin, adding that it provides a rare rCLopportunity
    in the geological past to understand how ecosystems
    can recover from these quick, severe changes.rCY
    ...

    Paper here

    https://pubs.geoscienceworld.org/gsa/geology/article-abstract/54/3/285/724558/New-species-evolved-within-a-few-thousand-years-of
    January 21, 2026
    New species evolved within a few thousand years of the
    Chicxulub Impact

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  • From RonO@rokimoto557@gmail.com to talk-origins on Mon Jun 8 09:19:29 2026
    From Newsgroup: talk.origins

    On 6/7/2026 8:32 PM, Pro Plyd wrote:

    Don't recall seeing mention of this. From February, just
    came across it

    https://www.sciencenews.org/article/evolution-dinosaurs-chicxulub-asteroid

    https://archive.ph/Zy2W7

    In the long shadow of the asteroid that wiped out
    the dinosaurs, life appears to have bounced back
    with surprising speed.

    A new analysis of sedimentation rates suggests
    that the first wave of marine species emerged
    within a few thousand years of the mass extinction
    event, many millennia quicker than many scientists
    assumed.

    The findings, reported January 21 in Geology,
    invite a rethink of how rapidly evolution can
    rebuild biological diversity rCo not just as it did
    after the Chicxulub asteroid struck Earth
    66 million years ago, but perhaps also today and
    into the future as climate change and other human
    pressures accelerate the pace of ecological
    upheaval.

    rCLThis really helps us understand how quickly
    species can evolve,rCY says Christopher Lowery, a
    paleoceanographer at the University of Texas at
    Austin, adding that it provides a rare rCLopportunity
    in the geological past to understand how ecosystems
    can recover from these quick, severe changes.rCY
    ...

    Paper here

    https://pubs.geoscienceworld.org/gsa/geology/article- abstract/54/3/285/724558/New-species-evolved-within-a-few-thousand-years-of January 21, 2026
    New species evolved within a few thousand years of the
    Chicxulub Impact


    I found a paper that claimed that there were 21 morphospecies of Parvularugoglobigerina and that only 3 survived the K/T extinction
    event. P. eugubina is claimed to be a new morphospecies because it
    looked different enough from the survivors to be called something
    different. The claim is that over 70% of the existing species did not
    survive the extinction event that killed off the non-avian dinos.
    Initially the survivor's populations would have likely crashed with most
    of the other existing species, and some morphotypes would have been
    better suited than others to survive the environmental conditions that
    existed for sometime after the impact. My take is that the genetics to produce the P. eugubina morphospecies already existed within Parvularugoglobigerina. Hybrids or even exaggerated morphotypes within
    a species would be selected for. The Grants demonstated that
    morphological change could occur very rapidly within a species of
    Galapagos finch during an extended drought dependent on the standing
    genetic variation that the population already contained.

    Ron Okimoto

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