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At 03:11 PM 3/24/00 -0500, John Bois wrote:
Specifically, among terrestrial vertebrates the ONLY group that
experienced true extinctions were the dinosaurs!...
Not strictly true, at least according to Archibald. His analysis of the
Hell Creek and overlying layers shows the following: 50% extinction in
Multituberculates, 89% extinction in Marsupials, 70% extinction in
squamates, and 100% extinction in non-avian dinosaurs.
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