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About
once
every
600,000
years.
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Give or take. It's about 30,000 years overdue now.
My understanding is that the theory of cataclysmic extinction is currently favored by scientists over gradual extinction, but I will not assert it as I only have one source to cite, and that's sloppy scholarship.
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(VISITOR) AUTHOR'S NAME MaryArlene
MESSAGE TIMESTAMP 06 september 2005, 17:12:24
AUTHOR'S IP LOGGED 209.180.69.195
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