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Re: Science feather strength debate
The asymmetrical vanes of the remiges and rectrices of
_Archaeopteryx_ suggest some kind of aerial capability. But not
necessarily powered flight, because _Microraptor_ has them too.
Of course, the only argument against *Microraptor* being a powered flier
is the same one that holds for *Archaeopteryx* and *Confuciusornis*: its
However, some flightless birds retain asymmetrical vanes (e.g.,
Oho. Reference, please?