RE: How Did Hadrosaurs Survive?

["Tim Donovan" <msdonovan66@hotmail.com>]

> From: "Brian Lauret" <zthemanvirus@hotmail.com>
> Reply-To: zthemanvirus@hotmail.com
> To: dinosaur@usc.edu
> Subject: RE: How Did Hadrosaurs Survive?
> Date: Tue, 29 Oct 2002 20:05:10 +0000

> > From: "Williams, Tim" <TiJaWi@agron.iastate.edu>
> > Reply-To: TiJaWi@agron.iastate.edu
> > To: "'Tim Donovan '" <msdonovan66@hotmail.com>
> > CC: "'dinosaur@usc.edu'" <dinosaur@usc.edu>
> > Subject: RE: How Did Hadrosaurs Survive?
> > Date: Tue, 29 Oct 2002 14:07:39 -0600
> >
> >
> > Tim Donovan wrote:
> >
> >
> > >   Euoplocephalus was adapted to the smaller Albertosaurus and failed to
> > > survive alongside T. rex.
> >
> > I guess T. rex invented the electric drill.  I can't see any other way 
> > that
> > a tyrannosaur could bore through ankylosaur armor.

 As I wrote before, Ankylosaurus evolved extra armor lacking in 
Euoplocephalus. Some recent studies strongly suggest tyrannosaurs attacked 
ankylosaurs. With its robust teeth, T. rex as likely more proficient at 
this.
> Maybe Tyrannosauruswas able to turn lighter ankylosaurs on their 
> backside,while larger ones are too heavy.


 No, they didn't need to.
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