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> if this variation in growth rate did > happen,
> one practical advantage could be a reduced effective basal
> thus (perhaps) requiring less food?
Something similar to this happens in mammals and birds today. A period of
rapid growth followed by an adulthood where metabolic requirements are
proportionately less. This should not be viewed as an indication that adult
dinosaurs were "less warm-blooded" than the young unless the same can be
said for elephants, egrets, and _Mus_.