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The Biggest Dinosaurs
At 2:01 PM, August 20, 1997, Christy Nadalin wrote (in part):
<does anyone have any thoughts about why dinosaurs in Patagonia were
growing so large during the Cretaceous>?
If I may expand upon Christy's question for the purposes of this
discussion, does anyone have any thoughts about why the upper absolute
size of dinosaurs was so much greater than the upper absolute size of
terrestrial animals today? Over the past 5 years or so, I have been
(rather informally, I admit--no claim to scientific rigor on this one)
compiling references on size estimates of predatory dinosaurs and their
probable prey and comparing that relationship to the known sizes of
extant terrestrial predators and prey. From the material I've
gathered--which is admittedly sketchy--the *relative* size of predators
to prey in those two communities seem to be quite similar, even though
the absolute sizes are quite different.