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Re: Warm-Blooded debate
>> Indications are that adult fully endothermic sauropods would have overheated,
>> particularly since they have no known anatomical structures with which to
>> dump excess body heat, so full adult endothermy >likely< developed in the
>> aforementioned lineage leading to birds >after< the sauropods diverged.
>I still wonder about this. Animals as large as elephants do not
>overheat, and their main source of cooling other than getting in the
>shade is radiation via the ears. Of course they radiate heat back
>to the environment at night as large animals do as well. I don't
>know if anyone has looked at the entire skin being a radiator in
>elephants or not (active not passive), but I'll find out and get back
>to you. If a sauropod can use its circulatory system to radiate
>heat back to the environment via the skin as well, then I see no
>reason for them to overheat.
Elephants blow dust and water on their backs, presumably to cool
down. Hard to see how the animals' skin could radiate heat faster than the
sun is pouring it on.
I haven't heard, in several years, any discussion of how sauropods
dealt with their relatively tiny heads. Has that conundrum been resolved?
Seems to me that an herbivorous endotherm the size of a C-130 Galaxy
aircraft, but equiped with a horse-sized head, would have to eat at
shrew-like rates to keep warm. Yet if the thing were ectothermic, wouldn't
that reduce the caloric rate requirements and thus make the tiny head
"Dammit, Philbert; what kind of a lepidopterist are you? For god's
man; stand up to them!"