The Great Dying - Too much heat and too little oxygen
Scientists call it the Great Dying, a 250-million-year-old catastrophe that wiped out 90 percent of ocean species and 70 percent of land species in the biggest &to=http:// english.pravda.ru/society/2002/01/11/25263.html ' target=_blank>mass extinction in Earth's geologic history.
The cause of this cataclysm is a matter of great dispute among paleontologists, but research released Thursday offers new evidence that &to=http:// english.pravda.ru/science/19/94/377/14519_climate.html ' target=_blank>global warming caused by massive and prolonged volcanic activity may have been the chief culprit.
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