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Re: Bigger dinosaurs had warmer blood.
--- "Richard W. Travsky" <firstname.lastname@example.org> wrote:
> On Tue, 11 Jul 2006, Allan Edels wrote:
> >> From Yahoo:
> > Bigger dinosaurs had warmer blood.
> > The bigger a dinosaur was, the warmer its blood, a
> study of the big beasts'
> > fossil remains shows.
> > [...]
> > But as dinosaurs got bigger, they became less
> efficient at dissipating heat
> > and this helped to keep them warm anyway. This is
> known as inertial
> > homeothermy.
> > According to the scientists' equation, the
> enormous sauropod Apatosaurus -
> > which at 13,000kg was among one of the biggest
> dinosaurs - had a body
> > temperature of just over 40C.
> And the first thing that came to mind for me was how
> DID they shed heat?
> If they had to move fast to escape a predator, that
> would have raised
> their temperature even more...
I'm thinking that this might have been the main
function of air sacs in dinosaurs (esp. large
theropods and sauropods).
That aside, I doubt _Apatosaurus ajax_ ever had to
move fast to do anything.
"I am impressed by the fact that we know less about many modern [reptile] types
than we do of many fossil groups." - Alfred S. Romer
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