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Re: If the asteroid had missed...
On 3/15/07, firstname.lastname@example.org <email@example.com> wrote:
>Ah, but here's the rub: even if you are correct, the modern faunal
composition probably wouldn't exist without the bolide effects, which creates a
bit of a Catch 22.
Certainly. However, the animals that seem to do most of the predation on
extant large nesters (e.g., armadillos, birds, lizards) are not extravagantly
different from pre-boundary animals. Most explanations for the absence of
large dinosaurs invoke preresidential advantage of current niche holders. Yet,
terror birds staged a large carnivorous come back in SA. Why was this the only
one (?). And why did it ultimately fail? I agree that the invaders were quite
different from boundary types...still.
The Diatrymiformes (NA and Eurasia) and Dromornithidae (Australia)
were both large and possibly carnivorous.
Why can't you be a non-conformist just like everybody else?