[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: New Ruben et al. dinosaur physiology reference
On Wed, Jul 09, 2003 at 02:07:56PM -0500, Tim Williams scripsit:
> Graydon <firstname.lastname@example.org> wrote:
> >I'm bothered by it becuase nasal turbinates are primarily a mechanism
> >for moisture retention and heat exchange, and it's hard to see them
> >as the only way to do that, particularly given the probable basal
> >nature of the dinosaurian uniflow airsack and lung system, so I'm
> >seeing this as an unjustifiably strong conclusion.
> The hypothesis is that the presence of respiratory turbinates can be
> equated with endothermy. Thus, the absence of RTs indicates the
> absence of endothermy. This equation has been criticized (many, many
> times) as overly simplistic. Greg Paul, for one, provides an
> excellent summation:
I'd take the elephants and kids to outright falsify the hypothesis.
email@example.com | Uton we hycgan hwaer we ham agen,
| ond thonne gedhencan he we thider cumen.
| -- The Seafarer, ll. 117-118.