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Re: Yet more on dinosaur quad climbers



On Fri, Jul 12, 2013 at 07:12:32PM -0700, Mike Habib wrote:
> On Jul 12, 2013, at 6:58 PM, Ruben Safir <ruben@mrbrklyn.com> wrote:
> 
> > He might present something reasonable.
> > I'm always interested in hearing.
> 
> If you want to stop being condescending and present some data, then I'd be 
> interesting hearing.
> 
> 
> > PS - the turtle problem is different.  Accerting that the shell was
> > not evolved because of its amour advantage would be the equivilent
> > argument…
> 
> Indeed.  And in a similar sense, the early stages of shell expansion may not 
> have been for armor, because the earliest changes in the turtle skeleton may 
> not have conferred much protection.  Just as for feathers, a functional shift 
> likely occurred.  Structures don't evolve for functions they'll have later.
> 


We are not talking about precursors and proto feathers, which were
clearly NOT for flight.  We are talking about wings and flight feather.