What killed almost everything?
Scientists can choose from a growing menu of proposed causes for the end-Permian extinction. Here are the leading contenders.
By
Joel Davis |
Published: Thursday, 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.