On the website, Science Daily there are is an article posted January 27, 2009 that talks about the theory of the North American Comet 12, 900 years ago. It says that new data disproves the theory of the comet, and that there is not evidence there was continental -scale fires. The tests they took were examining charcoal and pollen records to assess how fire regimes in North America. One thing that the results did prove was that the increase in large-scale wildfires in all regions of the world during the past decade is related to an increase in global warming. This means that when there is an increase in global warming, there will also be an increase in wild fires. This is bad news but can also help predict more wild fires to come in the future.
Study made by Dr. Sandy Harrison and the University of Bristol
http://www.sciencedaily.com/releases/2009/01/090126173729.htm
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