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Re: 4 winged dino NOVA
Flight feathers on the forelimbs have the flow of air parallel to the
The secondaries, yes. The primaries -- no. That's why the primaries are more
In *Microraptor* the foot feathers are even more asymmetric than the
The only other option would be to twist the feet 90 degrees inward at the
ankles, which I don't think would have been anatomically possible.