What killed almost everything?
Scientists can choose from a growing menu of proposed causes for the end-Permian extinction. Here are the leading contenders.
February 21, 2008
|What caused the Great Dying? Though far from a consensus view, an emerging hypothesis does account for many lines of geological and fossil evidence. This explanation includes the effects of super-eruptions, methane hydrates, the greenhouse effect, and oceanic anoxia.|
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