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Re: K-T selection event
>Random musings . . .
>I've never entirely bought into the notion of a meteor strike causing
>the terminal-Cretaceous extinctions. So I keep thinking about other
>things that might have done it. My main question is: why did the
>extinction occur the way it did? Why were dinosaurs wiped out and not
>mammals or birds? Why mosasaurs and not sharks? Why ammonites and not
(discussion of metabolism gradations deleted)
>Comments, thoughts, ideas, anyone?
I'd be willing to accept an asteroid (or asteroid shower) as the
last straw in the extinction of the Mesozoic megafauna. The Daccan
eruptions, and maybe even the climatological after-effects of the breakup
of the supercontinents may have contributed. But as to the survival of
mammals and birds, I think it had something to do with the fact that they
were seed-eaters and insectivores. Cockroaches and plants with small seeds
obviously survived, and so then did the animals that fed on them. How many
insect- or small seed- eating dinosaurs were there?
"Dammit, Philbert; what kind of a lepidopterist are you? For god's
man; stand up to them!"