Feathers, which are the most complex integumental structures known in the animal kingdom, without doubt required coordinated changes in numerous genes.
Farina says that if you want to make “creationists’ head explode” you just have to mention that reptile scales and bird feathers are made of the same keratin.
These incongruent or homoplastic characters are a notorious problem for phylogenetics and contradict the evolutionary prediction of a nested hierarchy.
Giberson and Collins point to the feather as a prime example of a novel feature arising via blind evolution.
A newborn porcupine passes through its mother’s birth canal without causing her any injuries. How?