 | Volcanoes blamed for worst mass extinction http://news.independent.co.uk/world/science_technology/story.jsp?story=603039
By Steve Connor, Science Editor
21 January 2005
The greatest mass extinction in the 3.5-billion-year history of life on Earth probably occurred as a result of climate change resulting from a series of huge volcanic eruptions, researchers believe.
They said a study of "the great dying", when 90 per cent of marine life became extinct and three-quarters of land animals and plants died out, had failed to support earlier suggestions of the Earth and a giant asteroid colliding.
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