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RE: Notion of Mammals Causing Dinosaur Extinctions
Regardless of the fact that dinosaurs existed for 170 million years
without a problem from the mammals (who evoved right alongside them),
there is no evidence of gradual extinction of dinosaurs over the last
few million years of the Cretaceous (Fastovsky et al. SN.1991).
Unless, all of a sudden (within a few thousand years at most) mammals
ate all the dinosaur eggs, then it doesn't seem very feasible that the
mammals caused or had anything to do with their extinction. Also, most
mammals went extinct at the K-T boundary along with the non-avian
dinosaurs, except for the lucky few which eventually led to the
evolution of people, who sit around pondering such things.
Jon Weinbaum
Ecology & Evolutionary Biology
at Uconn and part-time lurker.
JWeinbaum@msn.com