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explained. Thus, to the Officer-Drake school, volcanism tied together all the facts remarkably well.

There was no denying that they were onto something. After the eruptions of Krakatoa in 1883, Mount St. Helens in 1980, and Pinatubo in 1991, the dust and sulfur injected into the atmosphere shaded the earth enough to cause average world temperature to drop, though by only one or two degrees. And remember that it was the report of the darkening effects of the Krakatoa eruption that set Luis Alvarez on the trail of meteorite impact in the first place. It would be the height of irony were Krakatoa now to be used to defeat his theory.

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