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*To*: DML <dinosaur@usc.edu>*Subject*: Re: Dinosaur temperature paper*From*: David Marjanovic <david.marjanovic@gmx.at>*Date*: Tue, 18 Jul 2006 08:59:05 +0200*References*: <5D664573-5F53-4090-A091-714D255D1A72@blueoakfarm.com> <006601c6a9cb$1f4a3510$0300a8c0@IPC>*Reply-to*: david.marjanovic@gmx.at*Sender*: owner-DINOSAUR@usc.edu

I wrote:

I wonder what happens in adults that have reached their final adult size (and thus have a growth rate close to zero. Using the same logic and the same equation that Gillooly et al. use to “calculate” temperature during ontogeny, I calculate that the body temperature of an adult Apatosaurus is close to zero [Kelvin].

Not quite.

T = 10 log [G (M exp -0.75)/g0]

If G is 0, we get T = 10 log 0 = 10 x 1 = 10. Right? Ten kelvin! WooHoo!!!

Wrong. Log 1 is 0 -- and log 0 is minus infinity. Thanks to Richard Cowen for mentioning this basic fact. Been a long time since math in school...

**References**:**Dinosaur temperature paper***From:*Richard Cowen <cowen@blueoakfarm.com>

**Re: Dinosaur temperature paper***From:*David Marjanovic <david.marjanovic@gmx.at>

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