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Re: dinosaur anatomy
<< That makes the *symmetrical* feathers on _Protoarchaeopteryx_ a bit
difficult to fathom, doesn't it? >>
Yes. It makes more sense if _Protarchaeopteryx_ (sp?) is secondarily
flightless and, like modern-day ratites, its asymmetrical feathers reverted to
symmetry since they lost their use for flight.
To me, the whole feather-evolution makes more sense if feathers originated as
insulation, then came in handy as a flight apparatus later ... Just _my_
"Now listen here, monkey-boy! Compared to you humans, I'm on the top rung of
the evolutionary ladder, so _can_ it, alright?"