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Re: Oxygen level in Mesozoic - shorter
On Tue, 6 Aug 2002, David Marjanovic wrote:
> > [...] _Apatosaurus_ required an oxygen content in
> > the atmosphere of about 35% to function at any level above a very slow
> > walk, slower than the rates deducted from trackways.
> So either there were 40 % oxygen or some basic assumption is wrong... Indeed
> their central argument are the relatively tiny nostrils of *Apatosaurus*. DA
> writes that the nostrils of elephants are just as tiny, so Hengst et aliorum
> conclusions (of course they thought they had proven sauropod ectothermy,
> BTW) are falsified.
just out of curiousity - How much mouth breathing does an elephant do?