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How plausible, or implausible, would it be for a lineage of birds' feathers to evolve into sharp, hardened plate-like scale armor (and/or blades), comparable to that of pangolins? And if it is plau...
How plausible, or implausible, would it be for a lineage of birds' feathers to evolve into sharp, hardened plate-like scale armor (and/or blades), comparable to that of pangolins? And if it is plau...