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  1. 19555

    Maybe there was a belch of hydrogen sulfide involved in the Permian extinctions. However, did it leave some geological trace, as did the vast Siberian outpourings of magma, both on land and in the sea, over the course of a million years during the period? Stan SkirvinScottsdale, Ariz. The ocean venting proposed by Lee Kump’s […]

    By Science News
  2. Earth

    Last Gasp: Toxic gas could explain great extinction

    Sudden venting of hydrogen sulfide from the deep sea could have caused the largest extinction in Earth's history by poisoning land animals and destroying atmospheric ozone that protects Earth from ultraviolet light.

    By Naila Moreira

  3. 19554

    This article features yet another study making summary statements on what is obviously inadequate sampling.