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RE: How Did Hadrosaurs Survive?
Tim Donovan wrote:
> Ceratopsids and ankylosaurs obviously had to become larger, but why
> did Edmontosaurus become so large?-it very likely didn't fight but fled.
> Unless the longer legs of a larger hadrosaur made it faster, large size
> would have been a disadvantage.
Who says? Large size is a wonderful defense for herbivores against large
predators. I think even Bakker (and I get the impression you've read a lot
of his work) has even suggested this.
> Albertosaurus was not the immediate ancestor of T. rex. Its ancestor
> must have evolved inland-as it is unknown in the Horseshoe Canyon.
> Finally, T. rex spread to the lowlands, displacing the albertosaurs and
> forcing the herbivores to become larger-those that could adapt.
Wow! You've solved the phylogeny, biogeography and ecomorphology of
tyrannosaurs in one swoop. Why are those professionals so far behind?