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Re: Theories on the extinction of dinosaurs

In a message dated 11/12/99 9:02:23 PM EST, kirkam@wam.umd.edu writes:

<< Hmm...why does there have to be one distinct cause of extinction? >>

Because as far as we know, the extinction happened all over the world at 
exactly the same time, within the resolution afforded by the geological 
column. For multiple causes to all converge like that on one narrow time span 
worldwide is well-nigh impossible.